Workplace-Based Entrustment Scales for the Core EPAs: A Multisite Comparison of Validity Evidence for Two Proposed Instruments Using Structured Vignettes and Trained Raters

Abstract

In a structured setting, both the Ottawa and Chen scales distinguished between preentrustable and entrustable learners; however, the Ottawa scale demonstrated more desirable characteristics. These findings represent a critical step forward in developing valid, reliable instruments to measure learner progression toward entrustment for the Core EPAs.