ContextThe increasing use of Internet-based learning in health professions education may be informed by a timely, comprehensive synthesis of evidence of effectiveness.Objectives To summarize the effect of Internet-based instruction for health professions learners compared with no intervention and with non-Internet interventions.

Interactivity, practice exercises, repetition, and feedback seem to be associated with improved learning outcomes, although inconsistency across studies tempers conclusions. Evidence for other instructional variations remains inconclusive.

Context  Computer‐aided instruction is used increasingly in medical education and anatomy instruction with limited research evidence to guide its design and deployment. Objectives  To determine the effects of (a) learner control over the e‐learning environment and (b) key views of the brain versus multiple views in the learning of brain surface anatomy. Design  Randomised trial with 2 phases of study. Participants Volunteer sample of 1st‐year psychology students (phase 1, n = 120; phase 2, n = 120). Interventions  Phase 1: computer‐based instruction in brain surface anatomy with 4 conditions: (1) learner control/multiple views (LMV); (2) learner control/key views (LKV); (3) programme control/multiple views (PMV); (4) programme control/key views (PKV). Phase 2: 2 conditions: low learner control/key views (PKV) versus no learner control/key views (SKV). All participants performed a pre‐test, post‐test and test of visuospatial ability. Main outcome measures  A 30‐item post‐test of brain surface anatomy structure identification. Results The PKV group attained the best post‐test score (57.7%) and the PMV group received the worst (42.2%), with the 2 high learner control groups performing in between. For students with low spatial ability, estimated scores are 20% lower for those who saw multiple views during learning. In phase 2, students with the most static condition and no learner control (SKV) performed similarly to those students in the PKV group. Conclusions Multiple views may impede learning, particularly for those with relatively poor spatial ability. High degrees of learner control may reduce effectiveness of learning.

OBJECTIVES Educators often speak of web-based learning (WBL) as a single entity or a cluster of similar activities with homogeneous effects. Yet a recent systematic review demonstrated large heterogeneity among results from individual studies. Our purpose is to describe the variation in configurations, instructional methods and presentation formats in WBL.METHODS We systematically searched MEDLINE, EMBASE, ERIC, CINAHL and other databases (last search November 2008) for studies comparing a WBL intervention with no intervention or another educational activity. From eligible studies we abstracted information on course participants, topic, configuration and instructional methods. We summarised this information and then purposively selected and described several WBL interventions that illustrate specific technologies and design features. RESULTSWe identified 266 eligible studies. Nearly all courses (89%) used written text and most (55%) used multimedia. A total of 32% used online communication via e-mail, threaded discussion, chat or videoconferencing, and 9% implemented synchronous components. Overall, 24% blended web-based and non-computerbased instruction. Most web-based courses (77%) employed specific instructional methods, other than text alone, to enhance the learning process. The most common instructional methods (each used in nearly 50% of courses) were patient cases, self-assessment questions and feedback. We describe several studies to illustrate the range of instructional designs. CONCLUSIONS

on average, Internet-based instruction and non-computer instruction require similar time. Instructional strategies to enhance feedback and interactivity typically prolong learning time, but in many cases also enhance learning outcomes. Isolated examples suggest potential for improving efficiency in Internet-based instruction.