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Fostering diagnostic knowledge through computer-supported, case-based worked examples: effects of erroneous examples
Veronika Kopp1, Robin Stark, Martin R Fischer
1Department of Internal Medicine, Medical Education Unit, University of Munich Hospital, Munich, Germany. veronika.kopp@med.uni-muenchen.de
Medical Education
|June 20, 2008
Summary
Using erroneous examples and elaborated feedback in a case-based learning environment significantly improves medical students' diagnostic knowledge acquisition. These learning gains are sustainable over time.
Area of Science:
- Medical Education
- Cognitive Science
- Educational Technology
Background:
- Case-based learning and worked examples are established methods for medical education.
- Enhancing diagnostic knowledge acquisition in medical students is a key educational objective.
- The effectiveness of erroneous examples and elaborated feedback in computer-based learning environments requires further investigation.
Purpose of the Study:
- To evaluate the effectiveness of a case-based, worked example approach in a computer-based learning environment for medical students' diagnostic knowledge.
- To investigate the impact of erroneous examples and elaborated feedback on diagnostic knowledge acquisition.
- To assess the sustainability of the learning effects.
Main Methods:
- A 2x2 factorial experimental design was employed with 153 medical students randomly assigned to four conditions: errors vs. no errors, and elaborated feedback vs. knowledge of correct result (KCR).
- A subgroup (n=52) was compared to a control group (n=145) on a multiple-choice question (MCQ) test to assess sustainability.
- The study utilized a computer-based learning environment to deliver the case-based, worked example approach.
Main Results:
- The combination of erroneous examples and elaborated feedback significantly enhanced the acquisition of diagnostic knowledge.
- These improvements were observed irrespective of students' time-on-task or prior knowledge levels.
- The positive effects of the learning environment on diagnostic knowledge were found to be sustainable.
Conclusions:
- The case-based, worked example approach, particularly when incorporating erroneous examples and elaborated feedback, is an effective and efficient method for improving medical students' diagnostic knowledge.
- The findings support the integration of these specific pedagogical strategies into computer-based medical education.
- The study demonstrates the long-term retention of learning gains achieved through this approach.
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