“…Log stream data does not provide a complete picture of all learner behaviours; for example, it e xcl udes those forms of engagement with learning that occurs off-line or may not leave a digital trace, such as i n some forms of emotional engagement (Fournier, Kop, & Sitlia, 2011;Veletsianos, Colleer, & Schne i der, 2015). The data are rarely designed for research purposes, and have been found variously to b e too granular or not granular enough for some purposes (Kizilcec, Piech, & Schneider, 2013), or too patchy or incomplete, or too inaccurate, confounded, or corrupted with data unrelated to learning (Dringus, 2012;Greller & Draschler, 2012;Siemens & Long, 2011).…”