Fig. 4From: “Connecting concepts helps put main ideas together”: cognitive load and usability in learning biology with an AI-enriched textbookSignificant differences between cognitive load sub-type levels. “1” and “2” indicate measuring points (start and close of the study). *Difference is sig. at the 0.05 level (2-tailed); ***difference is sig. at the 0.001 level (2-tailed)Back to article page