“…In our program, a significant percentage showed interest in attending but never participated, while an equally significant percentage left the program during the first weeks, confirming a number of other studies (Dillahunt, Wang, & Teasley, 2014;Gütl et al, 2014;Heutte, Kaplan, Fenouillet, Caron, & Rosselle, 2014;Ho et al, 2014;Perna et al, 2014;Santos, Klerkx, Duval, Gago, & Rodríguez, 2014;Stein & Allione, 2014;Tucker, Dickens, & Divinsky, 2014;Whitmer et al, 2014;Wilkowski, Deutsch, Russell, 2014;Greene, Oswald, & Pomerantz, 2015;Kleiman, Wolf, & Frye, 2015;Koedinger, Kim, Jia, McLaughlin, & Bier, 2015;Lackner, Ebner, & Khalil, 2015;Skrypnyk et al, 2015;Allione & Stein, 2016;Davis, Chen, Jivet et al, 2016a;Evans, Baker, & Dee, 2016;Fidal-go-Blanco, Sein-Echaluce, & García-Peñalvo, 2016;Maldonado et al, 2016;Tseng, Tsao, Yu, Chan, & Lai, 2016;Crosslin, Dellinger, Joksimovic, Kovanovic, & Gaševic, 2017;Tawfik et al, 2017).…”