AUTHOR=Li Hong TITLE=Impact of collaborative learning on student engagement in college English programs: mediating effect of peer support and moderating role of group size JOURNAL=Frontiers in Psychology VOLUME=Volume 16 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2025.1525192 DOI=10.3389/fpsyg.2025.1525192 ISSN=1664-1078