Peer‐assisted learning in medical education: A systematic review and meta‐analysis

Twenty-seven randomised controlled trials were eligible for inclusion, and twenty-one provided sufficient and complete data to enable meta-analysis. There was a significant improvement in the academic performance of medical students who received PAL compared with those in the control group (SMD = 0.52 [95% confidence interval 0.18-0.85]; p = .003). The impact of PAL was greater amongst clinical medical students (SMD = 0.63; p = .02) than preclinical medical students (SMD = 0.39; p = .08) and when used for teaching practical skills (SMD = 0.69; p = .001) compared with theory (SMD = -0.11; p = .21). Students taught by PAL also achieved better results in assessments conducted more than four weeks after course completion (SMD = 1.20; p = .04). [Correction added on 8 November 2020 after first publication. The data values in the Results section have been corrected in this version.] CONCLUSIONS: Medical students experiencing PAL benefit in terms of academic performance, relative to those not receiving PAL. PAL is of greatest value in the clinical stages of training and for practical skills. The long-term outcomes of PAL remain a priority for future research.