DEVELOPING STUDENTS COGNITIVE SKILLS IN A PROBLEM-BASED SURGERY CLERKSHIP

In 1989-90, 57 students in a new program for the third-year surgery clerkship at the University of Kentucky College of Medicine participated either in a control group (22 students) receiving a traditional method of instruction (Socratic instruction, SI) or in an experimental group (35 students) taking part in problem-based learning (PBL) sessions. The two groups' performances on six evaluative instruments designed to test either their factual knowledge or their knowledge application (i.e., clinical problem-solving skills) were compared. The measures of factual knowledge were associated with higher scores for the SI group on two quizzes; scores were not significantly different on another quiz and on a cumulative final examination. The measures of knowledge application (administered at the end of the clerkship) were associated with higher scores for the PBL group: scores were significantly higher on a modified essay examination and approached significance on a standardized-patient examination. The authors conclude that their results (1) have important similarities to those of previous research suggesting that a PBL format is essentially equivalent to a traditional curricular format in improving students' factual knowledge and (2) support the hypothesis that PBL is superior in improving clinical problem-solving skills.