How do social presence and active learning in synchronous and asynchronous online classes relate to students' perceived course gains? - Rabindra A. Ratan; Chimobi Ucha; Yiming Skylar Lei; Chaeyun Lim; Whisnu Triwibowo; Stephen Yelon; Anna Sheahan; Bailey Lamb; Baxter Deni; Vivian Hsueh Hua Chen (Comput. Educ., 2022)