Problem-Based Learning: An Overview of its Process and Impact on Learning

In this review, we provide an overview of the process of problem-based learning (PBL) and the studies examining the effectiveness of PBL. We also discuss a number of naturalistic and empirical studies that have examined the process of PBL and how its various components impact students' learning. We conclude that the studies comparing the relative effectiveness of PBL are generally consistent in demonstrating its superior efficacy for longer-term knowledge retention and in the application of knowledge. Studies on the process of PBL, however, are still inconclusive as to which component(s) of PBL most significantly impact students' learning, although causal studies have demonstrated that all the phases of PBL are necessary in influencing students' learning outcomes.