Cung, Bianca, Di Xu, and Sarah Eichhorn. “Increasing Interpersonal Interactions in an Online Course: Does Increased Instructor E-Mail Activity and a Voluntary In-Person Meeting Time Facilitate Student Learning?”. Online Learning 22, no. 3 (September 1, 2018). Accessed March 25, 2026. https://olj.onlinelearningconsortium.org/index.php/olj/article/view/1322.