No observed effect from a student-led mock objective structured clinical examination on subsequent performance scores in medical students in Canada.

Student-led peer-assisted mock objective structured clinical examinations (MOSCEs) have been used in different settings to help students prepare for subsequent higher-stakes, faculty-run OSCEs. MOSCE participants generally valued feedback from peers and report benefits to learning. Our study investigated whether participation in a peer-assisted MOSCE affects subsequent OSCE performance. To determine whether mean OSCE scores differed depending on whether medical students participated in the MOSCE, we conducted a between-subjects analysis of variance (ANOVA), with cohort (2016 vs. 2017) and MOSCE participation (MOSCE vs. No MOSCE) as independent variables and mean OSCE score as the dependent variable. Participation in the MOSCE had no influence on mean OSCE scores (P=0.19). There was a significant correlation between mean MOSCE scores and mean OSCE scores (Pearson's r = 0.52, P<0.001). Whereas previous studies report self-reported benefits from participation in student-lead MOSCEs, it was not associated with objective benefits in this study.