Informed self-assessment during the transition to medical school: a longitudinal narrative study.

Influences on medical students' ISAs change during the transition to studying medicine. A greater sense of belonging, and evidence of progress towards clinical competence became more important to self-assessment than comparison with peers and exam performance. Our findings reinforce the importance of formative assessments, opportunities to study and socialise with peers and early clinical experiences during first year. These experiences enhance ISA skills during the transition to medical school.