Fig. 3

Distribution of confidence and correctness per cluster. Blue colors represent correctly answered questions, red colors represent incorrectly answered questions. The shades of color indicate the level of confidence the student had in their answer. Beige represents unanswered questions. The upper plots are heat maps showing the scores for each answer for each student in the respective cluster (y-axis) ordered from left to right by the position of the question in the test (x-axis). The boxplots in the lower plots show how often a student answered with what confidence and correctness for each cluster. Thus, each boxplot includes all participating students in that cluster