The Effect of Repeated Review of Course Content on Medium- and Long-Term Retention in an Elective Veterinary Cardiology Course.

Assessment in veterinary medicine is challenging given the high volume of material and high cognitive load. Differing opinions exist regarding the utility of comprehensive final examinations in veterinary courses. A mixed-methods prospective randomized trial was undertaken with veterinary students (n = 47) in an elective cardiology course. All students received identical content, which was presented through weekly in-class lectures (eight total lessons). They were given access to four different formats of study aids and completed quizzes of content knowledge within 1 week of each lesson. For the cumulative final examination (post-test), students were explicitly instructed to study only for four out of the eight lessons. Students then completed a delayed post-test 3-6 months after completion of the course. Quantitative and qualitative data were collected in the form of in-depth pre- and post-course surveys. Overall, studying a particular lesson for the post-test resulted in higher scores for six out of eight lessons in the post-test (p < .05) but did not result in significantly higher scores for any lesson in the delayed post-test. Time spent studying for individual quizzes, as well as other measures of study habits, decreased significantly throughout the semester. Among study aids, student preference was highest for instructor-provided graphic organizers, and this preference persisted across the semester with a shift away from instructor-provided outlines over time (p = .043). Free-text survey responses showed that students had realistic expectations for the impact of studying for the post-test and appreciated exposure to a variety of study aid formats. In an elective veterinary cardiology course, review of material prior to a cumulative final examination led to improved short-term performance but no difference in retention 3-6 months later.