The educational effects of portfolios on undergraduate student learning: a Best Evidence Medical Education (BEME) systematic review. BEME Guide No. 11.

摘要

INTRODUCTION: In recent years, the use of portfolios as learning and assessment tools has become more widespread across the range of health professions. Whilst a growing body of literature has accompanied these trends, there is no clear collated summary of the evidence for the educational effects of the use of portfolios in undergraduate education. This systematic review is the result of our work to provide such a summary. METHODS: We developed a protocol based on the recommendations of the Best Evidence Medical Education (BEME) collaboration. Citations retrieved by electronic searches of 10 databases were assessed against pre-defined inclusion/exclusion criteria by two independent reviewers and full texts of potentially relevant articles were obtained. Studies were identified for inclusion in the review by examination of full text articles by two independent reviewers. At all stages, discrepancies were resolved by consensus. Data relating to characteristics of the student population, intervention, outcome measures, student design and outcomes were collected using a piloted data extraction form. Each study was assessed against 11 quality indicators designed to provide information about how well it was designed and conducted; and against the Kirkpatrick hierarchy as modified for educational settings. Comparisons between different groups were carried out using the Kruskal-Wallis test (non-parametric ANOVA) or the Mann-Whitney U test as appropriate. RESULTS: Electronic searches yielded 2,348 citations. A further 23 citations were obtained by hand searching of reference lists. About 554 full articles were retrieved and assessed against our inclusion criteria. Of the 69 studies included in our review, 18 were from medicine, 32 from nursing and 19 from other allied health professions, including dentistry, physiotherapy and radiography. In all professional groups, portfolios were used mainly in the clinical setting, completion was compulsory, reflection required and assessment (either formative, summative or a combination of both) the norm. Three studies used electronic portfolios. Whilst many studies used a combination of data collection methods, over half of all included studies used questionnaires, a third used focus group interviews and another third used direct assessment of portfolios. Most studies assessed student or tutor perceptions of the effect of the use of portfolios on their learning. Five studies used a comparative design, one of which was a randomized controlled trial. Studies were most likely to meet the quality indicators relating to appropriateness of study subjects, clarity of research question and completeness of data. However, in many studies, methods were not reported in sufficient detail to allow a judgement to be made. About 19 of the 69 included studies (27%) met seven or more quality indicators. Across all professions, such 'higher quality' studies were more likely to have been published recently. The median 'quality score' (number of indicators met) rose from two for studies published in 2000 or earlier to seven for studies published in 2005 or later. Significant differences were observed between the quality scores for studies published in or before 2000 and those published between 2001 and 2004 (p = 0.027), those published in or before 2000 and those published in 2005 or later (p = 0.002) and between all studies (p = 0.004). Similar trends were seen in all professional groups. About 59 (85%) of the included studies were assessed at level 1 of the modified Kirkpatrick hierarchy (i.e. 'participation' effects, including 'post hoc' evaluations of student perceptions of the effects of keeping a portfolio on their learning). About 9 (13%) of the studies reported direct measurement of changes in student skills or attitudes and one study reported a change in student behaviour. The main effects of portfolio use identified by the included studies were: Improvement in student knowledge and understanding (28 studies,