“…Often, researchers distinguish between completion and drop-off, where completion is defined as students who submitted the final exam (Ramesh et al, 2014), students who showed behaviour in the last week (Sinha et al, 2014), or students who earned a normal or "with distinction" certificate (Allione & Stein, 2016;Jiang et al, 2014;Pursel, Zhang, Jablokow, Choi, & Velegol, 2016) and by selfreports of (partially) completion (Adamopoulos, 2013). Often, researchers distinguish between completion and drop-off, where completion is defined as students who submitted the final exam (Ramesh et al, 2014), students who showed behaviour in the last week (Sinha et al, 2014), or students who earned a normal or "with distinction" certificate (Allione & Stein, 2016;Jiang et al, 2014;Pursel, Zhang, Jablokow, Choi, & Velegol, 2016) and by selfreports of (partially) completion (Adamopoulos, 2013).…”