Use of portfolios by medical students: significance of critical thinking.

Portfolios have been used in the medical curriculum to evaluate difficult-to-assess areas such as students' attitudes, professionalism and teamwork. However, their use early in a problem-based learning (PBL) course to foster deep learning and enhance students' self-directed learning has not been adequately studied. The aims of this paper are to: (1) understand the uses of portfolios and the rationale for using reflection in the early years of a PBL curriculum; (2) discuss how to introduce portfolios and encourage students' critical thinking skills, not just reflection; and (3) provide students with tips that could enhance their skills in constructing good portfolios.