“…In that, 3,682,944 logs were of the target contents, but we excluded 2,867,481 logs because students’ operation was too quick (less than 3 s) or too long (longer than 20 min), which implies students’ off-task behavior on the material. The thresholds were determined by the previous studies on e-book based learning interactions (Majumdar, Bakilapadavu, et al, 2021 a, Majumdar, Flanagan, et al, 2021 b; Yin et al, 2019 ). Finally, we included 815,463 logs for our analysis (Fig.…”