Skip to main content

SYSTEMATIC REVIEW article

Front. Educ., 06 January 2025
Sec. Higher Education

Social capital assessments in higher education: a systematic literature review

  • 1School of Engineering Education, Purdue University, West Lafayette, IN, United States
  • 2Engineering Education Transformations Institute, University of Georgia, Athens, GA, United States

Social capital theory is a valuable theoretical framework in the field of higher education—as it has been used to examine differences in important educational outcomes based on students’ social network and the resources embedded in that network. Despite multiple well-established methods proposed by seminal researchers, there is limited synthesis of how to assess social capital, perpetuating inconsistent findings and evidence for educational interventions. The aim of the study is to evaluate quantitative social capital assessments, based on survey design and operationalized measures, and recommend methods, operationalized measures and assessment instruments for social capital. Using seven educational databases and Web of Science, we reviewed 93 English language, quantitative studies from peer-reviewed journals, published from 1980 to 2022; to be included, studies had to measure the social capital of students entering and currently in undergraduate studies. Results from the 93 articles revealed that generators (18 papers), social network analysis (5 papers), and standard Likert measures (80 papers) were commonly used to assess social capital. Standard Likert measures, while most common, were rarely aligned with social capital theory, reducing the validity of the measures. Results also showed that operationalizations of social capital were heavily rooted in social network theory, where social capital is accessed through social networks (86 papers) and actions from alters (65 papers) in the students’ network. However, direct measures of social capital—that is, network characteristics, access to supports, and seminal definitions of trust and community—were less common. This study provides important consensus and recommendations for researchers to select assessment instruments appropriate for their study and rooted in principles of assessment validity. We recommend researchers select survey methods (e.g., social capital generators) and operationalizations (e.g., actions from alters) that are well aligned with social capital theory. Assessment instruments designed using strong theoretical frameworks, such as Lin’s network theory of social capital, add to the validity of the researchers’ instrument design, use and interpretation of the students’ social capital scores.

1 Introduction

Social capital theory, a framework for understanding the resources embedded in relationships, is a valuable theoretical framework for examining differences in educational outcomes and guiding interventions. Social capital theory has been used to investigate important educational outcomes—across a variety of differing assessment methods—such as undergraduate students’ academic satisfaction (Likert scale; Bye et al., 2020), well-being (Likert scale; Poots and Cassidy, 2020), persistence (resource generator; Dika and Martin, 2018), educational attainment (Likert scale; Etcheverry et al., 2001), and access to higher education (social network analysis; Ahn, 2010). With the framework becoming increasingly well-established in education (Engbers et al., 2017), secondary and postsecondary institutions have developed workshops, academic programs, and seminars focused on increasing students’ social capital as a means to bolster students’ success and persistence (Khosravi et al., 2019; Moschetti and Hudley, 2008; Schwartz et al., 2023). As more institutions develop interventions fostering undergraduate’s social capital, it is essential that researchers have assessment instruments that can accurately and concisely assess students’ social capital.

Extant social capital studies have utilized a variety of quantitative assessment instruments and measures with little consensus on the ideal definitions, methods, and measures available to measure the complex construct (Engbers et al., 2017; Magson et al., 2014). This lack of measurement standardization could be rooted in the many definitions available to operationalize social capital, the use of ad hoc measures not specifically made for measuring social capital or rooted in theory, or a lack of clear definitions that can be easily operationalized for measurement development (Lin, 1999; van der Gaag and Webber, 2008). For example, some studies will define social capital using seminal authors (e.g., Bourdieu, Coleman), yet fail to utilize well-defined theories (or any social capital theories at all) for operationalizing social capital measures or item development (e.g., Bini and Masserini, 2016; Lisnyj et al., 2021). Consequently, these studies then contribute to a base of literature that lacks theoretical alignment and contributes to inconsistent measurement of social capital (Engbers et al., 2017; Gamoran et al., 2021).

Consensus on rigorous, standardized construct definitions and measures is a needed foundation for strong research and effective interventions aimed at supporting students (Magson et al., 2014). Social capital constructs, measures and assessment instruments need consistent usage of a well-defined theory and strong evidence of validity (i.e., constructs well aligned with the theory and the methodology; AERA, APA, and NCME, 2014), reliability (i.e., consistency across multiple applications) and fairness (i.e., items measuring only the construct under investigation without being biased based on background factors). Without well-aligned theoretical framing and assessment validity, educational researchers have been found to publish conflicting findings (Gamoran et al., 2021). On the one hand, studies that utilized assessment instruments without strong alignment with social capital frameworks have found their work to be inconsistent with current studies (e.g., Perna and Titus, 2005; Sandefur et al., 2006)—thus contributing to scholarship that perpetuates confusion around the relationship between social capital and educational outcomes.

On the other hand, studies with assessment instruments with strong evidence of validity and alignment to the theory have started to build a crucial foundation for developing effective interventions. Benchmarking has been useful method for understanding the impact of interventions and performing comparison studies, as demonstrated by the Social Capital Bench Marking Survey, a survey used to benchmark the social capital of various communities across the United States (Easterling, 2011). Within higher education, Starobin et al. (2013), Chen and Starobin (2018, 2019), Johnson et al. (2016), Jorstad et al. (2017), and Kruse et al. (2015) developed and established validity evidence for the STEM Student Success Literacy (SSSL) Survey—a social capital assessment instrument well situated in Coleman’s (1988) definition of social capital and empirical studies on undergraduate students’ social capital. For 7 years, Starobin et al. (2013) created a base of empirical social capital research well situated in strong theory and assessment principles. However, few studies utilize instruments with such strong alignment to social capital theory or evidence of validity. For effective educational interventions to be developed, there is a clear need for a foundational base of literature with rigorous assessment instruments rooted in social capital theory.

Our study synthesizes the operationalizations and methods available for assessing social capital in higher education. Specifically, our study aims to synthesize the types of quantitative assessment methods educational researchers utilize to measure social capital and we explore the forms of social capital most measured. We investigate the following research questions: (1) How is social capital operationalized for use in higher education? and (2) What types of scaling and survey design techniques are used to assess social capital in higher education?

2 Literature review

2.1 Seminal authors in social capital literature

Rooted in the work of sociologists such as Bourdieu (1986) and Coleman (1988), social capital can be used to explain differences in outcomes based on access to and use of resources found in one’s network or relationships. While these principal theorists generally agree that social capital comprises the resources accessed from relationships, Bourdieu (1986), Lin (1999), Coleman (1988), and Putnam (1993) all had different definitions of social capital that influence the operationalization of social capital and the scaling and survey designs utilized. The interested reader may explore Mikiewicz (2021) and Li (2015) for a complete coverage of the differences between the seminal authors introduced.

2.1.1 Individual-based social capital

Historically, Bourdieu and Lin operationalize social capital as an individual’s access to resources within their own personal networks. Bourdieu (1986) posited that social capital is “the aggregate of the actual or potential resources which are linked to possession of a durable network of … relationships” (p. 21). Thus, access to social capital is dependent on the individual’s (i.e., the ego) membership in a social network, that varies in size, heterogeneity, and amount of capital possessed by the individuals in the network (i.e., alters). Similarly, Lin (2001) defined social capital as “resources embedded in one’s social networks, resources that can be accessed or mobilized through ties in the networks” (p. 4). Lin (2001) posited three sources of social capital: structural positions, network location, and purpose of action. Structural position and network location refer to network characteristics of the individual and the people in their networks who provide the resources (the alters), whereas purposes of action refers to the intent of the actions, such as providing expressive or instrumental supports (Lin, 2001). Expressive actions provide supports for the individual’s mental or physical health while instrumental actions provide tangible supports that help an individual access and achieve a goal (e.g., obtaining a scholarship, getting a new job). Lin (2001) posited that expressive actions come from close ties where “dense networks benefit the sharing and mobilizing [of] resources,” and instrumental actions are accessed through weak ties, where resources are accessed through multiple connecting or “bridging” relationships (p. 15). Lin and Bourdieu emphasized network characteristics as important factors in one’s accrual of social capital, which can be seen in assessment methods such as Lin’s (2001) position generators and Wasserman and Faust’s (1994) social network analysis.

Another established conceptualization of social capital, based Bourdieu’s work, is Nahapiet and Ghoshal’s (1998) framework for structural, relational, and cognitive social capital. While the three dimensions can be assessed separately, they are interrelated and commonly measured together for a more comprehensive understanding. Structural social capital refers to the individual’s possession of a social network. Cognitive and relational social capital both refer to shared feelings and values, where cognitive is one’s shared values and attitudes with others and relational is their mutual trust and expectations.

2.1.2 Community-based social capital

While Bourdieu and Lin focused on the individual, Coleman (1988) and Putnam (1993) defined social capital in terms of the collective good, where resources exist in relationships, social organizations, and strong community. Social capital as a collective good supports the individual through “social networks and the norms of reciprocity and trustworthiness that arise from them” rather than the individual’s specific alter-ego network (Putnam, 1993, p. 19). Coleman’s (1988) definition of social capital views the resources in collegiate organizations and programs as a public good available to those involved in the organization. Similarly, Putnam’s (1995) definition focuses on social organizations and the “networks, norms and trust that facilitate action and cooperation for mutual benefit” (p. 65). Putnam defined two key forms of capital: bonding and bridging capital. Bonding social capital is capital accessed through close, in-group ties, whereas bridging capital is accessed through weak, bridging ties (Putnam, 2000).

Based on Putman’s work, Shiri et al. (2013) developed a framework of social capital as shared social structures, where social capital is measured as “social trust, norms and values, social communication and common objectives, which prepare individuals for collective action” (Gholami et al., 2020, p. 510). The framework operationalizes themes of social trust, social values, and communication with seven factors: social values, social trust, social networks, social cohesion, social participation, social communication, and sharing knowledge.

2.2 Measurement consensus in social capital literature

Little in the way of synthesis on methods and operationalizations is available to those interested in assessing social capital, save for a few reviews and studies by seminal authors. Some reviews have examined the role of social capital in higher education (Dika and Singh, 2002), specifically focused on underrepresented students (Mishra, 2020), or have explored measures more generally (Engbers et al., 2017); however, these reviews offer little synthesis on the types of quantitative methods used in higher education. Lin (1999) posited three methods (social network analysis, name generators and position generators) and a working definition of social capital (embedded resources and network locations). Work by van der Gaag et al. (2008) and van der Gaag and Snijders (2004) posited three common methods for measuring social capital: name generators, resource generators, and position generators. However, little to no work has confirmed if these methods and operationalizations are well utilized in the literature. This study was born from the lack of available synthesis on methods and measures established from social capital theorists and seeks to provide recommendations for seeking an establish measure.

3 Methods

We utilized a systematic literature review to examine quantitative social capital assessment instruments for students entering higher education and those who are in higher education following guidelines established by Borrego et al. (2014) and Grant and Booth (2009).

3.1 Literature search procedures

First, we identified a search string aligned with our research questions that was based on the literature and previous work (Mishra, 2020). We queried nine databases; eight databases (searched through EBSCOhost) were chosen for their education-relevant literature. The ninth database, Web of Science, was selected to provide a broader, more comprehensive search. Per the guidelines established by Grant and Booth (2009), we utilized a similar search string when querying the nine databases with variations of the words “social capital,” “assessment,” and “undergraduates.” The search was restricted to journal articles in English and full-length papers published from 1980 to September 2022. All variations and databases are listed in Table 1.

Table 1
www.frontiersin.org

Table 1. Results of the number of articles queried from the databases with the specific search string.

3.2 Eligibility criteria

From the search strings, we queried 452 full-length, peer-reviewed journal articles from eight databases through EBSCOhost and 210 full-length, peer-reviewed journal articles from Web of Science. Once duplicates were removed (282 articles), we reviewed the remaining articles on how well they met the inclusion and exclusion criteria.

To be included

• Quantitative assessment instruments discussed are clearly aligned with social capital or constructs that the authors relate to social capital (e.g., social capital measures as social interactions, networking, etc.),

• Participants must be entering undergraduate education (i.e., high school seniors, non-traditional students, etc.) or be current undergraduates,

• Articles were published between 1980 to September 2022.

Articles were excluded if

• Instruments are not aligned with social capital theory,

• Study is not situated in higher education or study uses students in higher education but is not about higher education (i.e., health outcomes or social media use),

• No quantitative measures for social capital (i.e., only qualitative) are included,

• Study did not appear in a peer-reviewed journal, or

• No full-length paper was available, or paper was not accessible in English.

Many valuable higher education social capital assessments are qualitative in nature (Martin et al., 2013; Palmer and Gasman, 2008; Soria and Stebleton, 2013) or focused on K-12 students (Croninger and Lee, 2001; Miller et al., 2024; Willis and Fitzpatrick, 2019). We purposely narrowed our search to undergraduate students, as measures of social capital vary between K-12, undergraduate and graduate students due to their differing social networks and supports needed.

After removing duplicates, we screened 380 titles and abstracts based on the inclusion and exclusion criteria. We excluded 224 articles based on the eligibility criteria and selected 156 papers for full paper review. After applying the exclusion criteria, we reviewed 93 articles. The inclusion process can be seen graphically in Figure 1, a PRISMA flowchart based on Moher et al.’s (2009) work on reporting items for systematic reviews.

Figure 1
www.frontiersin.org

Figure 1. Adaptation of the PRISMA flowchart (Moher et al., 2009) for systematic literature review.

We analyzed the selected papers by inductively and deductively coding for each research question. First, we deductively coded the methods and scaling designs using codes directly from the methods established by Lin (1999), van der Gaag et al. (2008) and van der Gaag and Snijders (2004)—such as, social network analysis and social capital generators. We found one additional code, dichotomous and Likert scales, which was not directly specified by Lin, van der Gaag or Snidjers. Next, we analyzed how each paper operationalized social capital using deductive and inductive coding. Overarching themes, such as “social capital as actions” and “social capital as social networks” were deductively coded using Lin’s network theory of social capital (1999), Shiri et al.’s (2013) social structures, and Putnam’s bonding and bridging networks (1993). For our more detailed codes, we deductively coded measures based on frameworks by seminal authors (e.g., bonding and bridging capital) and emergently coded themes that were not well-situated within pre-existing frameworks (e.g., interactions, peer capital).

3.3 Reliability

We followed recommendations from Borrego et al. (2014) to avoid bias during the selection and analysis phases. As a team, we discussed search terms, methodology, and themes. Two researchers, one doctoral student, and one undergraduate researcher trained in social capital theory and higher education established inter-rater reliability for the initial screening phase and the analysis phase. The two researchers reviewed a random sample (30%) of the articles pulled at the abstract screening phase and a random sample (35%) of the articles selected for analysis. While all studies were screened and analyzed, due to time and financial constraints only 30% of studies went through the inter-rater reliability process, following guidelines for sample size presented by Sim and Wright (2005). Inter-rater reliability was calculated using Cohen’s к, a measure used to determine agreement of categorical or ordinal data for two or more raters (Gisev et al., 2013). Based on scale proposed by Landis and Koch (1977), the researchers were in “substantial agreement” during the initial screening stage (к = 0.69). Next, Cohen’s к was calculated for each research question. The inter-rater reliability for both research questions indicated that the two researchers were in substantial agreement (к1 = 0.75, к2 = 0.68).

4 Findings

4.1 Trends in the literature

We found that social capital theory was a widely used framework in studies published in a variety of journals—not all focused on higher education. The journals in this study feature multiple higher education contexts (e.g., Journal of Postsecondary Education & Disability, Community College Journal of Research and Practice, Journal of Hispanic Higher Education, International Journal of Engineering Education) and career development (e.g., Journal of Career Assessment). Additionally, social capital has been used in numerous other fields tangential to education, such as sports (e.g., Journal of Sport Behavior), public health (e.g., Health Communication), socio-economics (e.g., Journal of Socio-Economics), and more. We share these findings as understanding the context of the assessment is crucial in establishing its validity, reliability and fairness.

4.2 Findings related to RQ1: how is social capital operationalized for use in higher education?

In answering RQ1, social capital was operationalized by measuring social capital as (1) the characteristics of or interactions within the ego’s social network, (2) actions done by alters in the ego’s network (i.e., the resources shared, emotional support provided), (3) the shared values between the ego and their social network or community, and (4) proxy variables that do not directly measure social capital (e.g., number of siblings). See Table 2 and the Supplementary Table 1 for detailed information on the operationalization themes and papers analyzed.

Table 2
www.frontiersin.org

Table 2. Summary of results for common operationalizations of social capital.

4.2.1 Social capital measured as social networks

The most common operationalization of social capital utilized social network theory as the basis for assessment (74 studies). While all 74 studies assessed the ego’s social network as a measure of social capital, variations in how social networks were operationalized can be seen across the studies. A summary of the results from the review can be found in Table 2.

4.2.1.1 Social networks

In 13 of the 74 studies, social capital was operationalized as the presence of a network. Eleven studies utilized Likert or dichotomous scales to assess whether a student possessed a general or specific type of social network (e.g., presence of a college social network; Ahn and Davis, 2020; Anastasiadis et al., 2018; Edelman et al., 2016; Engberg and Wolniak, 2010; Gholami et al., 2020; Jemari et al., 2017; Kim et al., 2020; Nichols and Islas, 2016; Oja and Clopton, 2017; Tomlinson and Jackson, 2021; Whitney et al., 2012). Three studies measured the presence of a social network by measuring social capital through various social capital generators (Engberg and Wolniak, 2010; Grace, 2017; Martin, 2013).

Fifteen studies measured specific network characteristics, such as density, network size, and strength of ties. Eight studies measured the ego’s available social capital through network characteristics through a name, resource, and position generator or social network analysis (Ahn, 2010; Daza, 2016; Häuberer and Brändle, 2018; Martin et al., 2014, 2015; Okpych and Gray, 2021; Rodrigues et al., 2019; Skvoretz et al., 2020). Four studies utilized both generators and Likert scales to assess both the characteristics of those who provided supports (name and position generator) and the type of relationship or types of supports being provided (Likert scales; Brouwer et al., 2016; Engberg and Wolniak, 2010; Gowdy and Hogan, 2021; Lee et al., 2018). Three studies relied on Likert or dichotomous scales to assess the ego’s social network—measuring social network characteristics such as “friend network density” (Cheung and Liu, 2017) and maintaining or connection of social network ties (Trieu et al., 2019; Perez-Macias et al., 2019).

Another subset of papers operationalized social capital by assessing the ego’s network ties through bonding and bridging capital. Seven studies assessed both bridging and bonding social capital while 13 studies only assessed bridging social capital (e.g., Ma and Bennett, 2021; Trieu et al., 2019; Yu and Wang, 2019). Eleven of the 13 studies assessed the students’ bridging and bonding capital through Likert scales, often through Williams (2006) Internet Social Capital Scale for bonding and bridging social capital.

4.2.1.2 Interactions

A subset of papers focused on alter-ego “interactions” rather than looking at the ego’s network. Thirty-five studies measured “interactions” between the ego and their alters through Likert or dichotomous scales—including interactions with specific alter positions (i.e., parents, faculty, friends; e.g., Wang et al., 2018), frequency of interactions (Daza, 2016; Lingo, 2020), and the quality of each interaction measured as the perceived quality or the quality of the resources provided (e.g., Havelka, 2016; McCallen and Johnson, 2019). Interactions between the ego and alters may be labeled as forms of capital, such as faculty, academic, or college capital (e.g., Chen and Starobin, 2019); peer capital (e.g., Brouwer and Jansen, 2019); and family capital (e.g., Gao and Ng, 2017).

4.2.1.3 Networking

Lastly, four studies operationalized social capital as social networks through the literal act of networking. Four papers measured the ego’s participating in networking behavior or having networking skills (e.g., Tomlinson and Jackson, 2021) as an indicator of an ego’s potential or accessed social capital.

4.2.2 Social capital measured as actions

The next most common operationalization of social capital focuses on the “purposes of actions” (Lin, 2001). Most studies we found did not specifically reference Lin’s purposes of actions (i.e., expressive and instrumental actions); however, we frequently saw measures and items include terms such as “social supports” and “information related capital.” In 29 studies, instrumental supports were commonly measured by asking the respondent if they had someone who could provide them information (i.e., a name generator; e.g., Gowdy and Hogan, 2021), someone who provided access to resources (i.e., a resource generator; e.g., Dika and Martin, 2018), or if they had interactions with alters in specific positions (i.e., peer, faculty, family) that provided college-related information or resources (i.e., Likert scale; e.g., D’Amico et al., 2019). Eleven studies measured social capital as expressive actions, but their measurement of expressive actions were limited—only a few items related to positive interactions with alters (e.g., Etcheverry et al., 2001). Expressive actions were more common in papers that were concerned with supporting students’ well-being (e.g., Abbas et al., 2020; Yu et al., 2021).

4.2.3 Social capital measured as shared values

A less common operationalization found was measuring shared values through social participation, communication, values, and trust. We have created the umbrella operationalization of shared values to encompass three separate operationalizations: Nahapiet and Ghoshal’s (1998) structural, cognitive, and relational/behavioral social capital, Shiri et al.’s (2013) shared social structures, and social capital as trust. The theme of shared values is commonly in conjunction with additional themes such as social communication, social networks, and social participation.

Four studies utilized Nahapiet and Ghoshal’s (1998) framework for structural, cognitive, relational, and behavioral social capital. In total, three studies assessed structural capital (e.g., Jiang et al., 2021), three studies measured cognitive capital (e.g., Mato and Tsukasaki, 2019;) and three studies assessed relational/behavioral capital (e.g., Sotaquira et al., 2022).

Six studies operationalized social capital as Shiri et al.’s (2013) shared social structures, measuring a combination of the seven conceptual framework factors and other additional factors such as cultural values, social integration, social coherence, social confidence, and social cohesiveness (e.g., Adaryani et al., 2014; Galambahri et al., 2015; Shiri and Naderi, 2015). Most commonly, papers measured four to six factors, the most common factors being social participation (Adaryani et al., 2014; Galambahri et al., 2015; Gholami et al., 2020; Khosravani, 2016), social values (Gholami et al., 2020; Khosravani, 2016; Shiri and Naderi, 2015), and social cohesion (Gholami et al., 2020; Khosravani, 2016; Shiri and Naderi, 2015).

Lastly, twelve studies measured trust as an indicator of social capital. These studies generally paired measuring trust with bridging capital, social interactions, and exchange of information (instrumental actions; e.g., Perez-Macias et al., 2019; Sotaquira et al., 2022). Trust, while not explicitly an expressive action, was measured similarly. For example, Brouwer and Jansen (2019) operationalized trust as “the extent to which members of the learning community could rely on one another for support” (p. 225).

4.2.4 Social capital measured through proxy

The last operationalization found was the use of proxy variables as indicators of social capital. Utilizing proxy variables such as family engagement and involvement in organizations is rooted in early social capital work, with Coleman (1994) assessing social capital through involvement in religion. Sandefur et al. (2006) noted that the use of proxy variables can be valuable for assessing social capital as ego-alter interactions are hard to assess; however, some variables can be misleading, such as the number of siblings in a family, since the true social capital can only be measured by direct measures related to the relationship. The 29 studies utilizing proxy variables were categorized into three types of variables: friend background, family background, and community participation. Friend background variables generally measured the number of friends attending college (Kim et al., 2020; Nichols and Islas, 2016; Settle, 2011). Family variables often focused on family background and values; for example, items often measured socioeconomic status, parents’ background (i.e., education level), family structure (e.g., number of siblings), parental support, and expectations around education (e.g., Johnson et al., 2016; Wagner, 2015). Community variables included participation in specific communities such as political (e.g., participation in the communist party in China), school-based (e.g., participation in after-school sports) and religious (e.g., attending church; Lisnyj et al., 2021; Park, 2012).

4.3 Findings from RQ2: what types of scaling and survey design techniques are used to assess social capital in higher education?

In RQ2, we found 6 types of scaling and survey designs: social capital generators, social network analysis and Likert and dichotomous scales. Social capital generators (e.g., name, resource and position generators) and social network analysis are strong, direct measures of social capital, whereas Likert and dichotomous scales were found to be less aligned with social capital theory. See Table 3 and the Supplementary Table 2 for detailed information on the scaling and survey designs and papers analyzed.

Table 3
www.frontiersin.org

Table 3. Summary of the assessment types found in the literature.

4.3.1 Generators

Name generators, position generators, and resource generators all appeared in the literature by seminal authors and our study articles (see Table 3). Name generators prompt the participant to list a certain number of alters that have contributed to the participant’s social capital in a specific way (McCallister and Fischer, 1978; Wellman, 1979). From the listed alters, network characteristics are collected, such as the “position” of the alter (i.e., employment position), type of relationship, length of relationship, quantity of communication, and other aspects of the relationship. Since name generators prompt students to list the names of alters that they can think of in a survey setting, name generators tend to focus on measuring close, bonding relationships (McCallister and Fischer, 1978). In this literature review, name generator prompts often encouraged students to think of those with whom they had discussed school and personal topics. On average, the name generators prompted students to think of five to 10 alters. Data collected from name generators acted as a method to collect network characteristics that were later examined using social network framework and social network analysis methods (e.g., Ahn, 2010; Okpych and Gray, 2021; Rodrigues et al., 2019).

Position generators ask respondents to think of alters with specific social positions that provide access to resources (Lin, 2001). Although they are less common than name generators, Lin (2001) posited that the value of focusing on an alter’s structural position lies in the capital that position conveys. In the four position generators found in this review, the prompts focused on collecting the position of the person who provided educational guidance, such as being influential college-related decisions (Engberg and Wolniak, 2010; Liu, 2020; Skvoretz et al., 2020) or supporting them in academic endeavors (Martin, 2013). The specified alter positions prompted in the instruments fall into two categories: type of job (teacher, counselor) or name of relationship to the ego (parent, friend, relative, or peer).

Resource generators ask respondents to think of (an unspecified) alter who supports them and to record, through dichotomous or Likert scale, if they have someone who provides the listed resource (van der Gaag and Snijders, 2005). Within this study, all papers utilizing a resource generator utilized the original or an adapted form of van der Gaag and Snijders’ Resource Generator, entitled Survey on the Social Networks of the Dutch. This resource generator measures social capital broadly, querying about available forms of social capital in the respondent’s personal, financial, and work lives. In this study, three studies utilized all or parts of the Survey on the Social Networks of the Dutch (Brändle, 2017; Grace, 2017; Häuberer and Brändle, 2018). Three studies adapted the survey to better suit an educational context by measuring the specific instrumental and expressive educational resources available to students (Dika and Martin, 2018; Martin et al., 2014, 2015). Additionally, these studies addressed multiple methods of accruing capital by using a combined name and resource generator (Dika and Martin, 2018; Martin et al., 2014, 2015).

4.3.2 Social network analysis

Social network analysis is a method for collecting and assessing social capital from a network perspective (Lin, 1999; Wasserman and Faust, 1994). Generally, social network analysis examines the social capital available in networks through metrics such as network size; connections or betweenness for alters; heterogeneity, density, distance, tie strength, and other measures of alter network location. The type of social network measures depends on if the network is “open” or “closed,” where closed networks are closely knit networks where alters may know each other (Granovetter, 1973). For example, closed networks, such as mentoring networks or programs found in this review, allow for assessment of the network between alters as there is a finite number of alters (Ahn, 2010; Okpych and Gray, 2021). Papers in this review collected data for open networks using name generators, where not all of the alters listed were located in the same network, and the measures captured the relationship between the alter and the ego (e.g., Martin, 2013; Rodrigues et al., 2019). The most common measures found in this review assessed students’ quality of ties by examining the closeness, strength, or frequency of contact between the ego and their alter.

4.3.3 Surveys

Surveys, both Likert and dichotomous scales, were the most common method of assessing students’ social capital. Three common types of survey were identified in this review: (1) survey items created for the specific study, (2) survey items from previously validated instruments, and (3) survey items that were proxy variables from large-scale studies. Multiple studies utilized instruments that were used frequently, indicating some standardization of measuring specific methods or constructs, such as van der Gaag and Snijders’ (2005) resource generator and Williams’s (2006) Internet Social Capital Scale. Of the 80 studies that utilized surveys in this literature review, 16 surveys utilized proxy variables. We define proxy variables as the use of pre-existing surveys or data sets that were originally collected to measure constructs other than social capital (e.g., university satisfaction) and have been reinterpreted to measure social capital. These studies generally used large datasets from national longitudinal studies such as the National Educational Longitudinal Survey, the National Longitudinal Survey of Freshman, and National Survey of Student Engagement (Beattie and Thiele, 2016; Dika, 2012; Sandefur et al., 2006; Wagner, 2015). Instruments utilized in more than one study in this literature review are summarized in Table 4 and Supplementary Table 3.

Table 4
www.frontiersin.org

Table 4. Summary of common scales used to assess social capital.

5 Discussion

We sought to establish common methods and operationalizations that can be used to assess social capital in higher education to start a conversation of consensus around assessing social capital. Our research aligns with seminal researchers’ limited synthesis of assessment methods and operationalizations; specifically, we found that the methods shared by Lin (1999; e.g., name generator, position generator, and social network analysis) and van der Gaag and Webber (2008; e.g., social capital generators and social network analysis) were represented in our literature review. The operationalizations that Lin (1999) posited, assessing social capital as network locations (e.g., strength of tie) and embedded resources (e.g., network resources), also appeared in our review. Network characteristics, such as frequency and strength of tie, were among frequent operationalizations we found. Multiple instruments measure the range of embedded resources provided such as access to financial, family, and academic capital. While these reviews still reflect instruments used in social capital research, they are limited in their accuracy and prevalence.

5.1 Operationalizations of social capital (RQ1)

Common operationalizations found in the literature generally provided surface level information about the alters in a students’ network rather than assessing students embedded social capital. Seventy-four of the 93 studies we reviewed utilized social networks and interactions, but these common operationalizations are limited. For example, operationalizations such as “the presence of a social network” or the “interactions between alter and ego” are not well aligned with theory, as they do not capture the access or mobilization of resources for expressive or instrumental gain. Similarly, some studies measured interactions with specific types of alters or measure the quality through perceived understanding or frequency, which provides limited information about actual capital embedded in those relationships.

Instead, more direct measures operationalized social capital as resources available through ones’ social network—as seen in studies that measure network characteristics and/or resources accessed through network interactions (e.g., Brouwer et al., 2016; Gowdy and Hogan, 2021; Perez-Macias et al., 2019). Network characteristics, such as density, heterophily and quality of ties, and embedded resources, were less common, but strong in the sense that they are developed from Lin’s (2001) operationalization of social capital as network locations and Bourdieu (1986) as network density and heterophily. When selecting or developing measures of social capital, researchers should intentionally select direct indicators of social capital (e.g., networks, actions, shared values) rather than relying on weak measures, such as proxy indicators.

5.2 Social capital scaling and survey design techniques (RQ2)

We found that Likert and dichotomous survey designs (n = 80) were used significantly more than social capital generators and social network analysis, despite lacking alignment with theory or endorsement by seminal authors, such as Lin (1999) and van der Gaag and Webber (2008). Many of the studies present developed their own items without consulting the literature for existing instruments or establishing validity evidence. Consequently, assessment instruments and their items were poorly aligned with social capital theory—a sentiment shared by Engbers et al. (2017) who posits there has been “a tremendous loss in theoretical purity from Bourdieu’s time” (p. 550). A preferable strategy used by some of the studies (n = 25) was to use pre-established instruments (see instruments in Table 4). Selecting direct, pre-established measures will ensure the traits being measured are aligned with social capital theory, establish additional validity evidence for the assessment, and contribute to the ongoing conversation of assessing social capital in higher education (Engbers et al., 2017). While Likert and dichotomous surveys are easier to distribute and analyze than social capital generators and network analysis, social capital generators and social network analysis directly measure either social network characteristics or the resources embedded in them. We found social capital generators to be some of the strongest methods to measure social capital, as they directly measure a student’s access to resources and are developed from social capital theory (Lin, 2001). We recommend these methods, rather than creating new Likert scales; direct measures provide theoretical alignment and increase evidence of construct validity.

5.3 Trends in social capital research

While many studies contribute unique instruments, definitions, and operationalizations, little to no conversation is happening around already established methods that are based on the theory. We expected there to be cross-citations within the specific methods (e.g., name generator, social network analysis), but found no papers that cited other social capital study’s methodology. Rather, authors cite seminal authors in the field of social capital as evidence for the aptness of their methodology and papers of similar domains or contexts. For example, Batistic and Tymon (2017), a study on networking behavior and employability, is cited by four other studies in this literature review, all focused on networking, employability, and entrepreneurship (Caballero et al., 2020; Gholami et al., 2020; Ma and Bennett, 2021; Perez-Macias et al., 2019). Cross-pollination of assessment methods is essential to building a strong body of available assessments and establishing benchmarks for students’ levels of social capital. When assessing social capital in higher education, we should utilize established methods and instruments from current works and consider our role in providing strong validity evidence and guides for our instrument use.

International studies bring unique perspectives to social capital research with the addition of new operationalizations and frameworks. In the 24 international studies we analyzed, we found that cultural contexts (e.g., local religion, politics, and societal norms) played an important role in the definition and operationalization of social capital. For example, in Liu (2020), the author posits that guanxi networks, a specific type of social network that emphasizes trust and moral obligation to support, is fundamental to understanding social capital in Chinese culture. We encourage researchers to consider the role of contextual factors (e.g., societal norms, culture, politics, etc.) in their assessments. By being sensitive to these contexts, we can establish additional validity evidence for our assessments by accurately measuring students’ cultural perceptions of their own social capital. Future work could perform meta-analysis of social capital assessment instrument results and assessment validity to strengthen the base of literature available for designing educational policies and interventions.

6 Conclusion and recommendations for future directions

Current higher education literature lacks consensus on how to define, operationalize, and measure social capital which creates challenges for the researchers selecting an appropriate method or operationalization when designing a study. In order for future assessments developed to positively contribute to higher educations’ understanding of students’ social capital, there is a need for instruments with strong validity evidence and alignment to social capital frameworks. Our review identified several prominent trends in higher education literature: (1) social capital is frequently operationalized as social network characteristics, social interactions between ego-alter, and instrumental actions (2) Likert and dichotomous scales were the most used method, but often used proxy measures of social capital; (2) methods specifically developed for understanding social capital (e.g., name, resource, and position generators and social network analysis) appeared but were less common.

To develop a better understanding of how to support undergraduates’ social capital, researchers should come to a consensus on what aspects of social capital are valuable to measure and what methods most directly assess social capital. In doing so, the literature would provide more evidence to inform practitioners in higher education. To assist in consensus forming, we propose the following based on our findings:

• Operationalizations and methods should be guided by a strong theoretical framework (Engbers et al., 2017), such as Lin’s (2001) network theory of social capital;

• Operationalizations should measure direct indicators of social capital (e.g., actions from alters, interactions with alters, shared values with communities or alters) rather than proxy indicators (e.g., family size, participation in school sports);

• Survey measures should utilize a social capital generator (e.g., name, resource, or position generator) to directly assess the perceived support provided by alters in the network;

• Validation studies should be conducted before reporting the results;

• Established instruments, with evidence of validity, may be preferred for those not interested in developing new instruments.

Higher education researchers should consider these recommendations when considering how to best support undergraduate student success. We hope this review starts a consensus-based conversation on how best to assess social capital.

Data availability statement

The original contributions presented in the study are included in the article/Supplementary material, further inquiries can be directed to the corresponding author.

Author contributions

AG: Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Writing – original draft. JM: Conceptualization, Funding acquisition, Methodology, Project administration, Supervision, Validation, Writing – review & editing. KD: Conceptualization, Funding acquisition, Methodology, Project administration, Resources, Supervision, Validation, Writing – review & editing.

Funding

The author(s) declare that financial support was received for the research, authorship, and/or publication of this article. This work was supported by the National Science Foundation under Grant #2030133 and #2030083. Additionally, we acknowledge support from the U. S. Department of Defense [Contract No. W52P1J-22-9-3009].

Acknowledgments

The authors wish to thank Yuting Zhang for her contributions to literature review methods.

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher’s note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

Supplementary material

The Supplementary material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/feduc.2024.1498422/full#supplementary-material

References

Abbas, A., Eliyana, A., Ekowati, D., Saud, M., Raza, A., and Wardani, R. (2020). Data set on coping strategies in the digital age: the role of psychological well-being and social capital among university students in Java Timor, Surabaya, Indonesia. Data Brief 30:105583. doi: 10.1016/j.dib.2020.105583

PubMed Abstract | Crossref Full Text | Google Scholar

Adaryani, R. L., Akbari, M. R., Adel, F., and Amiri, A. (2014). Examine the effects of students’ social capital components on entrepreneurship intention (evidences from: University College of Agriculture and Natural Resources, University of Tehran). Int. J. Agricult. Manag. Dev. 4, 147–155. doi: 10.22004/ag.econ.246112

Crossref Full Text | Google Scholar

AERA, APA, and NCME (2014). Standards for educational and psychological testing. Washington, DC: American Educational Research Association.

Google Scholar

Ahn, J. (2010). The role of social network locations in the college access mentoring of urban youth. Educ. Urban Soc. 42, 839–859. doi: 10.1177/0013124510379825

Crossref Full Text | Google Scholar

Ahn, M. Y., and Davis, H. H. (2020). Sense of belonging as an indicator of social capital. Int. J. Sociol. Soc. Policy 40, 627–642. doi: 10.1108/IJSSP-12-2019-0258

Crossref Full Text | Google Scholar

Anastasiadis, C., Tsounis, A., and Sarafis, P. (2018). The relationship between stress, social capital and quality of education among medical residents. BMC. Res. Notes 11:274. doi: 10.1186/s13104-018-3387-5

PubMed Abstract | Crossref Full Text | Google Scholar

Bailey, A. W., and Russell, K. C. (2010). Predictors of interpersonal growth in volunteer tourism: a latent curve approach. Leis. Sci. 32, 352–368. doi: 10.1080/01490400.2010.488598

Crossref Full Text | Google Scholar

Batistic, S., and Tymon, A. (2017). Networking behaviour, graduate employability: a social capital perspective. Educ. Train. 59, 374–388. doi: 10.1108/ET-06-2016-0100

Crossref Full Text | Google Scholar

Beattie, I. R., and Thiele, M. (2016). Connecting in class? College class size and inequality in academic social capital. J. High. Educ. 87, 332–362. doi: 10.1080/00221546.2016.11777405

Crossref Full Text | Google Scholar

Bini, M., and Masserini, L. (2016). Students’ satisfaction and teaching efficiency of university offer. Soc. Indic. Res. 129, 847–862. doi: 10.1007/s11205-015-1141-0

Crossref Full Text | Google Scholar

Borrego, M., Foster, M. J., and Froyd, J. E. (2014). Systematic literature reviews in engineering education and other developing interdisciplinary fields. J. Eng. Educ. 103, 45–76. doi: 10.1002/jee.20038

Crossref Full Text | Google Scholar

Bourdieu, P. (1986). The forms of capital. In J. G. Richardson (Ed.), Handbook of theory and research for the sociology of education. Westport, CT: Greenwood Press. 241–258.

Google Scholar

Brändle, T. (2017). How availability of capital affects the timing of enrollment: the routes to university of traditional and non-traditional students. Stud. High. Educ. 42, 2229–2249. doi: 10.1080/03075079.2016.1141401

Crossref Full Text | Google Scholar

Brouwer, J., and Jansen, E. (2019). Beyond grades: developing knowledge sharing in learning communities as a graduate attribute. High. Educ. Res. Dev. 38, 219–234. doi: 10.1080/07294360.2018.1522619

Crossref Full Text | Google Scholar

Brouwer, J., Jansen, E., Flache, A., and Hofman, A. (2016). The impact of social capital on self-efficacy and study success among first-year university students. Learn. Ind. Diff. 52, 109–118. doi: 10.1016/j.lindif.2016.09.016

Crossref Full Text | Google Scholar

Bye, L., Muller, F., and Oprescu, F. (2020). The impact of social capital on student wellbeing and university life satisfaction: a semester-long repeated measures study. High. Educ. Res. Dev. 39, 898–912. doi: 10.1080/07294360.2019.1705253

Crossref Full Text | Google Scholar

Caballero, G., Álvarez-González, P., and López-Miguens, M. J. (2020). How to promote the employability capital of university students? Developing and validating scales. Stud. High. Educ. 45, 2634–2652. doi: 10.1080/03075079.2020.1807494

Crossref Full Text | Google Scholar

Chen, Y., and Starobin, S. S. (2018). Measuring and examining general self-efficacy among community college students: a structural equation modeling approach. Commun. Coll. J. Res. Pract. 42, 171–189. doi: 10.1080/10668926.2017.1281178

Crossref Full Text | Google Scholar

Chen, Y., and Starobin, S. S. (2019). Formation of social capital for community college students: a second-order confirmatory factor analysis. Community Coll. Rev. 47, 3–30. doi: 10.1177/0091552118815758

Crossref Full Text | Google Scholar

Cheung, C., and Liu, E. S. (2017). Enhancing the contribution of volunteering to career commitment with friendship among university students. Career Dev. Int. 22, 754–771. doi: 10.1108/CDI-12-2016-0236

Crossref Full Text | Google Scholar

Clopton, A. W., and Finch, B. L. (2010). Are college kids “bowling alone?” examining the contribution of team identification to the social capital of college students. J. Sport Behav. 33, 377–402.

Google Scholar

Coleman, J. S. (1988). Social capital in the creation of human capital. Am. J. Sociol. 94, S95–S120. doi: 10.1086/228943

Crossref Full Text | Google Scholar

Coleman, J. S. (1994). Foundations of social theory. Cambridge, MA: Harvard University Press.

Google Scholar

Creed, P. A., and Gagliardi, R.-E. (2015). Career compromise, career distress, and perceptions of employability: the moderating roles of social capital and core self-evaluations. J. Career Assess. 23, 20–34. doi: 10.1177/1069072714523082

Crossref Full Text | Google Scholar

Croninger, R. G., and Lee, V. E. (2001). Social capital and dropping out of high school: benefits to at-risk students of teachers’ support and guidance. Teach. Coll. Rec. 103, 548–581. doi: 10.1111/0161-4681.00127

Crossref Full Text | Google Scholar

D’Amico, M. M., González Canché, M. S., Rios-Aguilar, C., and Salas, S. (2019). An exploration of college and career alignment for community college students. Rev. High. Educ. 43, 53–83. doi: 10.1353/rhe.2019.0090

Crossref Full Text | Google Scholar

Davis, S. N., and Wagner, S. E. (2019). Social and human capital influences on undergraduate researchers’ disciplinary identity: the case of social and natural scientists. Spur Scholar. Pract. Undergrad. Res. 2, 35–45. doi: 10.18833/spur/2/3/5

Crossref Full Text | Google Scholar

Daza, L. (2016). The role of social capital in students’ perceptions of progress in higher education. Educ. Res. Eval. 22, 65–85. doi: 10.1080/13803611.2016.1193029

Crossref Full Text | Google Scholar

Devor, C. S., Stewart, S. D., and Dorius, C. (2018). Parental divorce, social capital, and postbaccalaurate educational attainment among young adults. J. Fam. Issues 39, 2806–2835. doi: 10.1177/0192513X18760349

Crossref Full Text | Google Scholar

Dika, S. L. (2012). Relations with faculty as social capital for college students: evidence from Puerto Rico. J. Coll. Stud. Dev. 53, 596–610. doi: 10.1353/csd.2012.0051

Crossref Full Text | Google Scholar

Dika, S. L., and Martin, J. P. (2018). Bridge to persistence: interactions with educators as social capital for Latina/o engineering majors. J. Hisp. High. Educ. 17, 202–215. doi: 10.1177/1538192717720264

Crossref Full Text | Google Scholar

Dika, S. L., and Singh, K. (2002). Applications of social capital in educational literature: a critical synthesis. Rev. Educ. Res. 72, 31–60. doi: 10.3102/00346543072001031

Crossref Full Text | Google Scholar

Du’o’ng Cong Doanh (2021). The role of contextual factors on predicting entrepreneurial intention among Vietnamese students. Entrepren. Busi. Econom. Rev. 9, 169–188. doi: 10.15678/EBER.2021.090111

Crossref Full Text | Google Scholar

Easterling, D. (2011). Promoting community leadership among community foundations: the role of the social capital benchmark survey. Found. Rev. 3, 81–96. doi: 10.4087/FOUNDATIONREVIEW-D-11-00022

Crossref Full Text | Google Scholar

Edelman, L. F., Manolova, T., Shirokova, G., and Tsukanova, T. (2016). The impact of family support on young entrepreneurs’ start-up activities. J. Bus. Ventur. 31, 428–448. doi: 10.1016/j.jbusvent.2016.04.003

Crossref Full Text | Google Scholar

Engberg, M., and Wolniak, G. (2010). Examining the effects of high school contexts on postsecondary enrollment. Res. High. Educ. 51, 132–153. doi: 10.1007/s11162-009-9150-y

Crossref Full Text | Google Scholar

Engbers, T. A., Thompson, M. F., and Slaper, T. F. (2017). Theory and measurement in social capital research. Soc. Indic. Res. 132, 537–558. doi: 10.1007/s11205-016-1299-0

Crossref Full Text | Google Scholar

Etcheverry, E., Clifton, R. A., and Roberts, L. W. (2001). Social capital and educational attainment: a study of undergraduates in a faculty of education. Alberta J. Educ. Res. 47, 24–39. doi: 10.11575/ajer.v47i1.54841

Crossref Full Text | Google Scholar

Galambahri, S. F., Meykhosh, E., and Eghbali, J. (2015). Studying of the role of social capital in the motivation of students for job creation (case study: students of Islamic Azad University of Karaj). Int. J. Agricult. Manag. Dev. 5, 245–255. doi: 10.22004/ag.econ.262516

Crossref Full Text | Google Scholar

Gamoran, A., Miller, H. K., Fiel, J. E., and Valentine, J. L. (2021). Social Capital and Student Achievement: An Intervention-Based Test of Theory. Sociol. Educ. 94, 294–315. doi: 10.1177/00380407211040261

Crossref Full Text | Google Scholar

Gao, F., and Ng, J. C. K. (2017). Studying parental involvement and university access and choice: an “interacting multiple capitals” model. Br. Educ. Res. J. 43, 1206–1224. doi: 10.1002/berj.3298

Crossref Full Text | Google Scholar

Gholami, H., Alambeigi, A., Farrokhnia, M., Noroozi, O., and Karbasioun, M. (2020). The role of social capital in Iranian agricultural students’ acquisition of generic skills. High. Educ.Skills Work-based Learn. 11, 508–527. doi: 10.1108/HESWBL-01-2019-0015

Crossref Full Text | Google Scholar

Gisev, N., Bell, J. S., and Chen, T. F. (2013). Interrater agreement and interrater reliability: key concepts, approaches, and applications. Res. Soc. Adm. Pharm. 9, 330–338. doi: 10.1016/j.sapharm.2012.04.004

PubMed Abstract | Crossref Full Text | Google Scholar

Gowdy, G., and Hogan, S. (2021). Informal mentoring among foster youth entering higher education. Child. Youth Serv. Rev. 120:105716. doi: 10.1016/j.childyouth.2020.105716

Crossref Full Text | Google Scholar

Grace, M. K. (2017). Subjective social status and premedical students’ attitudes towards medical school. Soc. Sci. Med. 184, 84–98. doi: 10.1016/j.socscimed.2017.05.004

PubMed Abstract | Crossref Full Text | Google Scholar

Granovetter, M. S. (1973). The strength of weak ties. Am. J. Sociol. 78, 1360–1380. doi: 10.1086/225469

Crossref Full Text | Google Scholar

Grant, M. J., and Booth, A. (2009). A typology of reviews: an analysis of 14 review types and associated methodologies. Health Inform. Libr. J. 26, 91–108. doi: 10.1111/j.1471-1842.2009.00848.x

PubMed Abstract | Crossref Full Text | Google Scholar

Häuberer, J., and Brändle, T. (2018). Marginal utility of social capital: the assistance of family and friends in choosing university studies. Int. Stud. Sociol. Educ. 27, 409–431. doi: 10.1080/09620214.2018.1464402

Crossref Full Text | Google Scholar

Havelka, D. (2016). Antecedents to team performance on student IT projects. J. Inf. Syst. Educ. 27, 51–60.

Google Scholar

Hsu, C.-Y., and Wang, S.-M. (2019). Social entrepreneurial intentions and its influential factors: a comparison of students in Taiwan and Hong Kong. Innov. Educ. Teach. Int. 56, 385–395. doi: 10.1080/14703297.2018.1427611

Crossref Full Text | Google Scholar

Huynh, V. D. B., Nguyen, Q. L. H. T. T., Nguyen, P. V., and Nguyen, P. T. (2018). Application partial least square structural equation to develop a job search success measurement model. J. Mech. Continua Math. Sci. 13, 50–59. doi: 10.26782/jmcms.2018.12.00005

Crossref Full Text | Google Scholar

Ingels, S. J., Pratt, D. J., Rogers, J. E., Siegel, P. H., and Stutts, E. S. (2004). Education longitudinal study of 2002: Base year data file user’s manual. Washington, DC: U.S. Department of Education: National Center for Education Statistics.

Google Scholar

Ingels, S. J., Scott, L. A., Taylor, J. R., Owings, J., and Quinn, P. (1998). National Education Longitudinal Study of 1988 (NELS: 88), base year through second follow-up: Final methodology report [working paper series] Washington, DC: US Department of Education, National Center for Education Statistics.

Google Scholar

Iwanaga, K., Wu, J. R., Armstrong, A. J., Kaya, C., Dutta, A., Kundu, M., et al. (2021). Assessing perceived social support among African American college students with disabilities: a confirmatory factor analysis. J. Postsecondary Educ. Disab. 34, 127–140.

Google Scholar

Jahanian, R. (2013). A study on determining social capital development indicators in society: university students’ point of view. Hrvatski Casopis Za Odgoj I Obrazovanje 15, 43–60. doi: 10.15516/cje.v15i1.303

Crossref Full Text | Google Scholar

Jemari, M. A., Kasuma, J., Kamaruddin, H. M., Tama, H. A., Morshidi, I., and Suria, K. (2017). Relationship between human capital and social capital towards social entrepreneurial intention among the public university students. Int. J. Adv. Appl. Sci. 4, 179–184. doi: 10.21833/ijaas.2017.012.032

Crossref Full Text | Google Scholar

Jiang, Y., Chi, X., Lou, Y., Zuo, L., Chu, Y., and Zhuge, Q. (2021). Peer reading promotion in university libraries: based on a simulation study about readers’ opinion seeking in social networks. Inform. Technol. Lib. 40, 1–17. doi: 10.6017/ital.v40i1.12175

Crossref Full Text | Google Scholar

Johnson, J. D., Starobin, S. S., and Santos Laanan, F. (2016). Predictors of Latina/o community college student vocational choice in STEM. Commun. College J. Res. Pract. 40, 983–1000. doi: 10.1080/10668926.2016.1204963

Crossref Full Text | Google Scholar

Johnson, J. M., and Jackson, E. (2024). The HBCU advantage: reimagining social capital among students attending black colleges. Front. Educ. 9:1344073. doi: 10.3389/feduc.2024.1344073

Crossref Full Text | Google Scholar

Jorstad, J., Starobin, S. S., Chen, Y., and Kollasch, A. (2017). STEM aspiration: the influence of social capital and chilly climate on female community college students. Commun. College J. Res. Pract. 41, 253–266. doi: 10.1080/10668926.2016.1251358

Crossref Full Text | Google Scholar

Kerr, B. A., Multon, K. D., Syme, M. L., Fry, N. M., Owens, R., Hammond, M., et al. (2012). Development of the distance from privilege measures: a tool for understanding the persistence of talented women in STEM. J. Psychoeduc. Assess. 30, 88–102. doi: 10.1177/0734282911428198

Crossref Full Text | Google Scholar

Khosravani, F. (2016). Analyze the components of social capital among agricultural students with emphasis on entrepreneurship. Iran. J. Agricult. Econ. Develop. Res. 47, 391–401. doi: 10.22059/IJAEDR.2016.59711

Crossref Full Text | Google Scholar

Khosravi, R., Azman, A., Ayasreh, E. A. M., and Khosravi, S. (2019). Can a building social capital intervention improve the mental health of international students? A non-randomized quasi-experimental study. Int. Soc. Work. 62, 1384–1403. doi: 10.1177/0020872818797996

Crossref Full Text | Google Scholar

Kim, A.-S., Choi, S., and Park, S. (2020). Heterogeneity in first-generation college students influencing academic success and adjustment to higher education. Soci. Sci. J. 57, 288–304. doi: 10.1016/j.soscij.2018.12.002

Crossref Full Text | Google Scholar

Krishna, A., and Shrader, E. (1999). Social capital assessment tool. Conf. Soci. Capital Poverty Reduc. 2224.

Google Scholar

Kruse, T., Starobin, S. S., Chen, Y., Baul, T., and Santos Laanan, F. (2015). Impacts of intersection between social capital and finances on community college students’ pursuit of STEM degrees. Commun. College J. Res. Pract. 39, 324–343. doi: 10.1080/10668926.2014.981893

Crossref Full Text | Google Scholar

Kuh, G. D. (2001). The national survey of student engagement: Conceptual framework and overview of psychometric properties. Bloomington, IN, USA: Indiana University Center for Postsecondary Research.

Google Scholar

Landis, J. R., and Koch, G. G. (1977). The measurement of observer agreement for categorical data. Biometrics 33, 159–174. doi: 10.2307/2529310

Crossref Full Text | Google Scholar

Lee, S., Chung, J. E., and Park, N. (2018). Network environments and well-being: an examination of personal network structure, social capital, and perceived social support. Health Commun. 33, 22–31. doi: 10.1080/10410236.2016.1242032

PubMed Abstract | Crossref Full Text | Google Scholar

Liming, L., and Shunguo, Z. (2015). Analysis of factors influencing undergraduates’ occupation choices: an investigation of both social and human capital. Chin. Educ. Soc. 48, 42–58. doi: 10.1080/10611932.2015.1014706

Crossref Full Text | Google Scholar

Lingo, M. D. (2020). Arts attendance among first-year American college students. Arts Educ. Policy Rev. 121, 160–172. doi: 10.1080/10632913.2019.1682092

Crossref Full Text | Google Scholar

Lin, N. (1999). Building a network theory of social capital. Connect 22, 28–51.

Google Scholar

Lin, N. (2001). Social capital: A theory of social structure and action. Cambridge, UK: Cambridge University Press.

Google Scholar

Lisnyj, K. T., Pearl, D. L., McWhirter, J. E., and Papadopoulos, A. (2021). Targeting components of social capital on campus to alleviate Canadian post-secondary students’ academic stress. Curr. Psychol. 42, 13–23. doi: 10.1007/s12144-021-01376-5

Crossref Full Text | Google Scholar

Liu, D. (2020). The role of social capital/guanxi in students’ decision-making about postgraduate education in China: an explorative case study. Front. Educ. China 15, 453–481. doi: 10.1007/s11516-020-0019-3

Crossref Full Text | Google Scholar

Li, Y. (2015). “Social capital in sociological research: conceptual rigour and empirical application” in Handbook of research methods and applications in social capital. Li (Ed.). Cheltenham, UK: Edward Elgar Publishing. 1–20.

Google Scholar

Magson, N. R., Craven, R. G., and Bodkin-Andrews, G. H. (2014). Measuring social capital: The development of the social capital and cohesion scale and the associations between social capital and mental health. Aust. J. Educ. Dev. Psychol. 14, 202–216.

Google Scholar

Martin, J. P., Brown, S., Miller, M. K., and Stefl, S. K. (2015). Characterizing engineering student social capital in relation to demographics. Int. J. Eng. Educ. 31, 914–926.

Google Scholar

Martin, J. P., Miller, M. K., and Simmons, D. R. (2014). Exploring the theoretical social capital “deficit” of first generation college students: implications for engineering education. Int. J. Eng. Educ. 30, 822–836.

Google Scholar

Martin, J. P., Simmons, D. R., and Yu, S. L. (2013). The role of social capital in the experiences of Hispanic women engineering majors. J. Eng. Educ. 102, 227–243. doi: 10.1002/jee.20010

Crossref Full Text | Google Scholar

Martin, N. D. (2013). “Forms of social capital: family resources, campus networks, and dominant class advantage at an elite university” in Networks, work and inequality. ed. S. McDonald, Emerald Publishing Limited. vol. 24, 359–386.

Google Scholar

Mato, M., and Tsukasaki, K. (2019). Modeling the factors associating with health-related habits among Japanese students. Health Promot. Int. 34, 300–311. doi: 10.1093/heapro/dax077

PubMed Abstract | Crossref Full Text | Google Scholar

Maunah, B. (2020). Social and cultural capital and learners’ cognitive ability: issues and prospects for educational relevance, access and equity towards digital communication in Indonesia. J. Soci. Stud. Educ. Res. 11, 163–191.

Google Scholar

Ma, Y., and Bennett, D. (2021). The relationship between higher education students’ perceived employability, academic engagement and stress among students in China. Educ. Train. 63, 744–762. doi: 10.1108/ET-07-2020-0219

Crossref Full Text | Google Scholar

McCallen, L. S., and Johnson, H. L. (2019). The role of institutional agents in promoting higher education success among first-generation college students at a public urban university. J. Divers. High. Educ. 13, 320–332. doi: 10.1037/dhe0000143

Crossref Full Text | Google Scholar

McCallister, L., and Fischer, C. S. (1978). A procedure for surveying personal networks. Sociol. Methods Res. 7, 131–148. doi: 10.1177/004912417800700202

Crossref Full Text | Google Scholar

Meeuwisse, M., Severiens, S. E., and Born, M. P. (2010). Learning environment, interaction, sense of belonging and study success in ethnically diverse student groups. Res. High. Educ. 51, 528–545. doi: 10.1007/s11162-010-9168-1

Crossref Full Text | Google Scholar

Mikiewicz, P. (2021). Social capital and education–an attempt to synthesize conceptualization arising from various theoretical origins. Cogent Educ. 8:1907956. doi: 10.1080/2331186X.2021.1907956

Crossref Full Text | Google Scholar

Miller, E., Ziaian, T., Baak, M., and de Anstiss, H. (2024). Recognition of refugee students’ cultural wealth and social capital in resettlement. Int. J. Incl. Educ. 28, 611–628. doi: 10.1080/13603116.2021.1946723

Crossref Full Text | Google Scholar

Mishra, S. (2020). Social networks, social capital, social support and academic success in higher education: a systematic review with a special focus on ‘underrepresented’ students. Educ. Res. Rev. 29:100307. doi: 10.1016/j.edurev.2019.100307

Crossref Full Text | Google Scholar

Moher, D., Liberati, A., Tetzlaff, J., and Altman, D. G.The PRISMA Group (2009). Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. PLoS Med. 151, 264–269. doi: 10.7326/0003-4819-151-4-200908180-00135

Crossref Full Text | Google Scholar

Moschetti, R., and Hudley, C. (2008). Measuring social capital among first-generation and non-first-generation, working-class, white males. J. Coll. Admiss. 198, 25–30.

Google Scholar

Moschetti, R. V., Plunkett, S. W., Efrat, R., and Yomtov, D. (2018). Peer mentoring as social capital for Latina/o college students at a Hispanic-serving institution. J. Hisp. High. Educ. 17, 375–392. doi: 10.1177/1538192717702949

Crossref Full Text | Google Scholar

Myers, B., Starobin, S. S., Laanan, F. S., and Russell, D. (2012). Office of Community College Research and Policy, Examining student engagement and transfer intentions among community college STEM students. The Office of Community College Research and Policy Research Brief, 6. Ames, IA: Office of Community College Research and Policy.

Google Scholar

Nahapiet, J., and Ghoshal, S. (1998). Social capital, intellectual capital, and the organizational advantage. Acad. Manag. Rev. 23, 242–266. doi: 10.2307/259373

Crossref Full Text | Google Scholar

Neri, F., and Ville, S. (2008). Social capital renewal and the academic performance of international students in Australia. J. Soci. Econ. 37, 1515–1538. doi: 10.1016/j.socec.2007.03.010

Crossref Full Text | Google Scholar

Nichols, L., and Islas, Á. (2016). Pushing and pulling emerging adults through college: college generational status and the influence of parents and others in the first year. J. Adolesc. Res. 31, 59–95. doi: 10.1177/0743558415586255

Crossref Full Text | Google Scholar

Oja, B. D., and Clopton, A. W. (2017). Race, social capital, adjustment, and intercollegiate athletics: the opportunity to improve social acclimation at academic institutions. J. Study Sports Athl. Educ. 11, 46–65. doi: 10.1080/19357397.2017.1285997

Crossref Full Text | Google Scholar

Okpych, N. J., and Gray, L. A. (2021). Ties that bond and bridge: exploring social capital among college students with foster care histories using a novel social network instrument (FC-connects). Innov. High. Educ. 46, 683–705. doi: 10.1007/s10755-021-09553-x

Crossref Full Text | Google Scholar

Palmer, R., and Gasman, M. (2008). “It takes a village to raise a child”: the role of social capital in promoting academic success for African American men at a black college. J. Coll. Stud. Dev. 49, 52–70. doi: 10.1353/csd.2008.0002

Crossref Full Text | Google Scholar

Park, J. J. (2012). It takes a village (or an ethnic economy): the varying roles of socioeconomic status, religion, and social capital in SAT preparation for Chinese and Korean American students. Am. Educ. Res. J. 49, 624–650. doi: 10.3102/0002831211425609

Crossref Full Text | Google Scholar

Perez-Macias, N., Luis Fernandez-Fernandez, J., and Rua Vieites, A. (2019). Entrepreneurial intentions: trust and network ties in online and face-to-face students. Educ. Train. 61, 461–479. doi: 10.1108/ET-05-2018-0126

Crossref Full Text | Google Scholar

Perna, L. W. (2004). Understanding the decision to enroll in graduate school: sex and racial/ethnic group differences. J. High. Educ. 75, 487–527. doi: 10.1080/00221546.2004.11772335

Crossref Full Text | Google Scholar

Perna, L. W., and Titus, M. A. (2005). The relationship between parental involvement as social capital and college enrollment: an examination of racial/ethnic group differences. J. High. Educ. 76, 485–518. doi: 10.1080/00221546.2005.11772296

Crossref Full Text | Google Scholar

Poots, A., and Cassidy, T. (2020). Academic expectation, self-compassion, psychological capital, social support and student wellbeing. Int. J. Educ. Res. 99:101506. doi: 10.1016/j.ijer.2019.101506

Crossref Full Text | Google Scholar

Putnam, R. D. (1993). The prosperous community: social capital and public life. Am. Prospect. 13, 35–42.

Google Scholar

Putnam, R. D. (1995). Bowling alone: America’s declining social capital. J. Democr. 6, 65–78. doi: 10.1353/jod.1995.0002

Crossref Full Text | Google Scholar

Putnam, R. D. (2000). Bowling alone: The collapse and revival of American community. New York, NY: Simon and Schuster.

Google Scholar

Rodrigues, R., Butler, C. L., and Guest, D. (2019). Antecedents of protean and boundaryless career orientations: the role of core self-evaluations, perceived employability and social capital. J. Vocat. Behav. 110, 1–11. doi: 10.1016/j.jvb.2018.11.003

Crossref Full Text | Google Scholar

Ro, H. K., Lee, J., Fernandez, F., and Conrad, B. H. (2021). We don’t know what they did last summer: examining relationships among parental education, faculty interaction, and college students’ post-first year summer experiences. Innov. High. Educ. 46, 21–39. doi: 10.1007/s10755-020-09523-9

Crossref Full Text | Google Scholar

Salaran, M. (2010). Research productivity and social capital in Australian higher education. High. Educ. Q. 64, 133–148. doi: 10.1111/j.1468-2273.2009.00448.x

Crossref Full Text | Google Scholar

Sandefur, G. D., Meier, A. M., and Campbell, M. E. (2006). Family resources, social capital, and college attendance. Soc. Sci. Res. 35, 525–553. doi: 10.1016/j.ssresearch.2004.11.003

Crossref Full Text | Google Scholar

Schwartz, S., Parnes, M., Browne, R., Austin, L., Carreiro, M., Rhodes, J., et al. (2023). Teaching to fish: impacts of a social capital intervention for college students. Am. Educ. Res. J. 60, 986–1022. doi: 10.3102/00028312231181096

Crossref Full Text | Google Scholar

Settle, J. S. (2011). Variables that encourage students to persist in community colleges. Commun. College J. Res. Pract. 35, 281–300. doi: 10.1080/10668920701831621

Crossref Full Text | Google Scholar

Shiri, N., Gholami, H., Arabi, R., and Mirakzadeh, A. (2013). Role of social capital in agricultural students’ academic achievement: a case from Iran. J. Educ. Sci. Psychol. 3, 101–110.

Google Scholar

Shiri, N., and Naderi, N. (2015). The significance of social capital in the higher agricultural education system. Int. J. Agricult. Manag. Dev. 5, 41–49. doi: 10.5455/ijamd.158241

Crossref Full Text | Google Scholar

Sim, J., and Wright, C. C. (2005). The kappa statistic in reliability studies: use, interpretation, and sample size requirements. Phys. Ther. 85, 257–268. doi: 10.1093/ptj/85.3.257

Crossref Full Text | Google Scholar

Skvoretz, J., Kersaint, G., Campbell-Montalvo, R., Ware, J. D., Smith, C. A. S., Puccia, E., et al. (2020). Pursuing an engineering major: social capital of women and underrepresented minorities. Stud. High. Educ. 45, 592–607. doi: 10.1080/03075079.2019.1609923

Crossref Full Text | Google Scholar

Soria, K. M., and Stebleton, M. J. (2013). Social capital, academic engagement, and sense of belonging among working-class college students. Coll. Stud. Aff. J. 31:139–153, 168–169.

Google Scholar

Sotaquira, L., Backhaus, I., Sotaquira, P., Pinilla-Roncancio, M., Gonzalez-Uribe, C., Bernal, R., et al. (2022). Social capital and lifestyle impacts on mental health in university students in Colombia: an observational study. Front. Public Health 10. doi: 10.3389/fpubh.2022.840292

PubMed Abstract | Crossref Full Text | Google Scholar

Sou, E. K. L., Yuen, M., and Chen, G. (2022). Career adaptability as a mediator between social capital and career engagement. Career Dev. Q. 70, 2–15. doi: 10.1002/cdq.12289

Crossref Full Text | Google Scholar

Stack-Cutler, H. L., Parrila, R. K., and Torppa, M. (2015). Using a multidimensional measure of resilience to explain life satisfaction and academic achievement of adults with reading difficulties. J. Learn. Disabil. 48, 646–657. doi: 10.1177/0022219414522705

PubMed Abstract | Crossref Full Text | Google Scholar

Starobin, S., Laanan, F., Russell, D., Lopez, C., and Chen, Y. (2013). STEM transfer readiness among community college students: Results from the fall 2012 survey study for STEM student success literacy at Kirkwood community colleges (unpublished report). Ames, IA: Office of Community College Research and Policy.

Google Scholar

Tomlinson, M., and Jackson, D. (2021). Professional identity formation in contemporary higher education students. Stud. High. Educ. 46, 885–900. doi: 10.1080/03075079.2019.1659763

Crossref Full Text | Google Scholar

Tran, N. A., Jean-Marie, G., Powers, K., Bell, S., and Sanders, K. (2016). Using institutional resources and agency to support graduate students’ success at a Hispanic serving institution. Educ. Sci. 6:28. doi: 10.3390/educsci6030028

Crossref Full Text | Google Scholar

Trieu, P., Bayer, J. B., Ellison, N. B., Schoenebeck, S., and Falk, E. (2019). Who likes to be reachable? Availability preferences, weak ties, and bridging social capital. Inf. Commun. Soc. 22, 1096–1111. doi: 10.1080/1369118X.2017.1405060

Crossref Full Text | Google Scholar

van der Gaag, M., and Snijders, T. A. (2005). The resource generator: social capital quantification with concrete items. Soc. Networks 27, 1–29. doi: 10.1016/j.socnet.2004.10.001

Crossref Full Text | Google Scholar

van der Gaag, M., Snijders, T. A., and Flap, H. D. (2008). “Position generator measures and their relationship to other social capital measures” in Social capital: An international research program. eds. N. Lin and B. Erickson (Oxford, UK: Oxford Academic), 27–48.

Google Scholar

van der Gaag, M., and Snijders, T. (2004). “Proposals for the measurement of individual social capital” in Creation and returns of social capital. eds. H. Flap and B. Völker (London, UK: Routledge), 172–187.

Google Scholar

van der Gaag, M., and Webber, M. (2008). “Measurement of individual social capital” in Social capital and health. eds. I. Kiwachi, S. V. Subramanian, and D. Kim (New York, NY: Springer), 29–49.

Google Scholar

Wadhwa, R. (2018). Unequal origin, unequal treatment, and unequal educational attainment: does being first generation still a disadvantage in India? High. Educ. 76, 279–300. doi: 10.1007/s10734-017-0208-z

Crossref Full Text | Google Scholar

Wagner, J. M. (2015). Hispanic minority college students at selective colleges: what matters with degree completion? J. Hisp. High. Educ. 14, 303–326. doi: 10.1177/1538192714568807

Crossref Full Text | Google Scholar

Wang, X., Wickersham, K., Lee, Y., and Chan, H.-Y. (2018). Exploring sources and influences of social capital on community college students’ first-year success: does age make a difference? Teach. Coll. Rec. 120, 1–46. doi: 10.1177/016146811812001003

Crossref Full Text | Google Scholar

Washington, V., and Mondisa, J.-L. (2021). A need for engagement opportunities and personal connections: understanding the social community outcomes of engineering undergraduates in a mentoring program. J. Eng. Educ. 110, 902–924. doi: 10.1002/jee.20422

Crossref Full Text | Google Scholar

Wasserman, S., and Faust, K. (1994). Social network analysis: Methods and applications. Cambridge, UK: Cambridge University Press.

Google Scholar

Wellman, B. (1979). The community question: the intimate networks of east Yorkers. Am. J. Sociol. 84, 1201–1231. doi: 10.1086/226906

Crossref Full Text | Google Scholar

Whitney, J., Langley-Turnbaugh, S., Lovewell, L., and Moeller, B. (2012). Building relationships, sharing resources, and opening opportunities: a STEM learning community builds social capital for students with disabilities. J. Postsecondary Educ. Disabil. 25, 131–144.

Google Scholar

Williams, D. (2006). On and off the ‘net: scales for social capital in an online era. J. Comput.-Mediat. Commun. 11, 593–628. doi: 10.1111/j.1083-6101.2006.00029.x

Crossref Full Text | Google Scholar

Willis, D. E., and Fitzpatrick, K. M. (2019). Food insecurity and social capital among middle school students. Youth Soc. 51, 1127–1144. doi: 10.1177/0044118X17725460

Crossref Full Text | Google Scholar

Wofford, A. M. (2022). The perpetuation of privilege: exploring the relationship between early admissions and high-impact practices. Res. High. Educ. 63, 1312–1342. doi: 10.1007/s11162-022-09681-z

Crossref Full Text | Google Scholar

Yu, B., Luo, M., Liu, M., Zhou, J., Yang, S., and Jia, P. (2021). Social capital changes after COVID-19 lockdown among youths in China: COVID-19 impact on lifestyle change survey (COINLICS). Front. Public Health 9. doi: 10.3389/fpubh.2021.697068

PubMed Abstract | Crossref Full Text | Google Scholar

Yu, T.-L., and Wang, J.-H. (2019). Factors affecting social entrepreneurship intentions among agricultural university students in Taiwan. Int. Food Agribusi. Manag. Rev. 22, 107–118. doi: 10.22434/IFAMR2018.0032

Crossref Full Text | Google Scholar

Zhang, Y., and Wang, Y. (2021). Inequality and access to elite universities in China: reexamining the interacting multiple capitals model. Stud. High. Educ. 46, 1881–1893. doi: 10.1080/03075079.2019.1711042

Crossref Full Text | Google Scholar

Zhimin, L., and Yao, G. (2015). Family capital social stratification, and higher education attainment—an empirical study based on Jiangsu Province. Chin. Educ. Soc. 48, 218–230. doi: 10.1080/10611932.2015.1085773

Crossref Full Text | Google Scholar

Ziemianski, P. (2018). The perception of an entrepreneur’s structural, relational and cognitive social capital among young people in Poland—an exploratory study. J. Entrepreneur. Manag. Innov. 14, 109–122. doi: 10.7341/20181416

Crossref Full Text | Google Scholar

Zimet, G. D., Dahlem, N. W., Zimet, S. G., and Farley, G. K. (1988). The multidimensional scale of perceived social support. J. Pers. Assess. 52, 30–41. doi: 10.1207/s15327752jpa5201_2

Crossref Full Text | Google Scholar

Keywords: social capital, assessment, systematic review, undergraduate, higher educaction

Citation: Gentry AN, Martin JP and Douglas KA (2025) Social capital assessments in higher education: a systematic literature review. Front. Educ. 9:1498422. doi: 10.3389/feduc.2024.1498422

Received: 19 September 2024; Accepted: 15 November 2024;
Published: 06 January 2025.

Edited by:

Paitoon Pimdee, King Mongkut’s Institute of Technology Ladkrabang, Thailand

Reviewed by:

Gregory Siy Ching, National Chengchi University, Taiwan
Khajornsak Buaraphan, Mahidol University, Thailand

Copyright © 2025 Gentry, Martin and Douglas. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

*Correspondence: Kerrie A. Douglas, ZG91Z2xhc2tAcHVyZHVlLmVkdQ==

Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.