Figure 3: Results of the survey on usability and motivational factors. All students (n=121) of IG_reg (n=65) and IG_int (n=56) answered questions on various items about the user-friendliness and motivational aspects on an endpoint-based Likert scale from 1 (“Strongly disagree”) to 6 (“Strongly agree”). Inductive statistics used are outlined in 3.2. Tables 4 and 5 show the exact mean values and standard deviations as well as further items on the measurement of motivational factors and usability. ***p<.001, ns=not significant.