Fig. 2

Appropriateness index, Interaction between confidence and score, knowledge self-monitoring and efficiency assessment. a, percentage of each combination between confidence and unadjusted score at a question in the overall population. b, knowledge self-monitoring, described as the percentages of scores at a question according to the level of confidence stated. The p-value indicates the result of the chi-squared test comparing the top 20% and the bottom 20% students. c, efficiency, described as the percentages of confidence statements at a question according to the level of confidence stated. The p-value indicates the result of the chi-squared test comparing the top 20% and the bottom 20% students