AUTHOR=Luo Lanlan , Jin Shan , Huang Qi TITLE=Emotional competence and problem behavior of left-behind preschool children—the roles of self-regulation and authoritative grandparenting styles JOURNAL=Frontiers in Education VOLUME=10 YEAR=2025 URL=https://www.frontiersin.org/journals/education/articles/10.3389/feduc.2025.1522792 DOI=10.3389/feduc.2025.1522792 ISSN=2504-284X