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Debriefing involves the active participation of learners to identify and close gaps in knowledge and skills. Varied debriefing methods are used in simulation, but no empirical studies have examined the effectiveness of peer-led debriefing in simulation using standardized patients. The purpose of this study was to compare the effects of two debriefing methods (instructor-led vs. peer-led) on nursing skills, knowledge, self-confidence, and quality of debriefing among undergraduate nursing students in South Korea.

A nonequivalent control group pretest-posttest design was used. Fifty-seven third-year nursing students were randomly assigned to instructor-led (n = 26) or peer-led (n = 31) debriefing groups after a simulation of preoperative care. Structured questions and areas for discussion guided debriefing in both groups. Self-administered questionnaires were used to collect data on students' …