Impact of frequency of spaced retrieval using repeat testing on asthma pharmacotherapy knowledge retention

Objective: "Test-enhanced learning" is a strategy utilized to impact knowledge retention. This study aimed to assess the effect of the frequency of spaced retrieval using repeat testing on knowledge depreciation in a Doctor of Pharmacy (PharmD) Program.

Methods: The study randomly assigned second-year pharmacy students to one of three retrieval practice groups: (1) two retrieval practice assessments (2 and 4 months after the course), (2) one retrieval practice assessment (4 months after the course), or (3) no retrieval practice. A final assessment was administered to all participants 6 months after the course. The retrieval assessments and final assessment consisted of five multiple-choice questions on asthma pharmacotherapy.

Results: In total, 94 participants were included in the study, with 32 in Group 1 and 31 in both Groups 2 and 3. All three groups performed similarly on the final assessment regardless of the frequency of spaced retrieval. While Group 1 scored numerically higher than Group 2 on the 4-month retrieval practice assessment and did not impact performance on the final assessment. In Group 1, final assessment scores were decreased compared to the two previous retrieval assessments.

Conclusion: Regardless of the frequency of spaced retrieval following the academic course where asthma pharmacotherapy was initially learned, retrieval practice using multiple choice assessments, with the gap times of this study, did not impact asthma pharmacotherapy knowledge depreciation among second-year student pharmacists.