Comparisons by group of mean Mentoring Competency Assessment subscale scores self-assessed by mentors, with changes shown from pretest (“Pre”) to posttest (“Post”) and from retrospective pretest (“Retro-pre”) to posttest (“Post”). Subscales shown are communication (3A), expectations (3B), understanding (3C), independence (3D), diversity (3E), and professional development (3F). Group means with 95% confidence intervals are shown. P values test for group difference in the indicated change.