Visual images are crucial for communicating science in educational contexts and amongst practitioners. Reading images contributes to meaning-making in society at large, and images are fundamental communicative tools in public spaces such as science centers. Here, visitors are exposed to a range of static, dynamic, and digital visual representations accessible through various multimodal and interactive possibilities. Images conveying scientific phenomena differ to what extent they represent real objects, and include photographs, schematic illustrations, and measurement-based models. Depicting realism in biological objects, structures and processes through images differs with respect to, inter alia, shading, color, and surface texture. Although research has shown that aspects of these properties can both potentially benefit and impair interpretation, little is known about their impact on viewers’ visual preference and inclination for further exploration. Therefore the aim of this study is to investigate what effect visual properties have on visitors’ perception of biological images integrated in an interactive science center exhibit. Visitors responded to a questionnaire designed to assess the impact of three indicators of realism (shading, color, and surface texture) and biological content (e.g., cells and viruses) on participants’ preferences, perceptions of whether biological images depicted real objects, and their desire to further explore images. Inspired by discrete choice experiments, image pairs were systematically varied to allow participants to make direct choices between images with different properties. Binary logistic regression analysis revealed that the three indicators of realism were all significant predictors of participants’ assessments that images depict real objects. Shadows emerged as a significant predictor of preference for further exploration together with the presence of cells in the image. Correlation analysis indicated that images that were more often selected as depicting real objects were also more often selected for further exploration. We interpret the results in terms of construal level theory in that a biological image perceived as a realistic portrayal would induce a desire for further exploration. The findings have implications for considering the role of realism and preference in the design of images for communicating science in public spaces.
A concept map is a powerful method that promotes meaningful learning and is highly recommended for use in biology classes. According to multimedia research, the effectiveness of concept maps could be improved by incorporating pictorial elements. Apart from using realistic images, a new field of research claims that specific design manipulations, including human-like features with appealing colors (emotional design), influence learners’ affective state and improve learning. A positive affective state is assumed to evoke emotions and provoke deeper cognitive processing, which increases the cognitive resources available for a task. We conducted two experiments with a total of N = 249 junior high school students, comparing the effect of concept maps with emotional design illustrations (emotional design), with non-emotional design illustrations (neutral design), and without illustrations (control design). Experiment 1 examined the influence of these designs on students’ perceived affective state, perceived cognitive load (extraneous, intrinsic, and germane load), perceived task difficulty, and learning performance (n = 202), experiment 2 focused on the perceived affective state of the students (n = 47). We found that emotional design led to a significant decrease in perceived task difficulty, but we neither found an effect on learning performance nor the positive affective state. Learning with pictorial concept maps (in emotional or neutral design) reduced the negative affect compared to learning with control concept maps. Other than expected, the neutral design led to reduced perceived extraneous and intrinsic cognitive load. Consequently, in terms of learning, emotional design in concept maps did not hamper learning but did not foster it either.