Pattern of answer changes to multiple choice questions in physiology

Area of Science:

• Educational Psychology
• Cognitive Science
• Assessment and Evaluation

Background:

• Traditional test-taking advice often discourages changing initial multiple-choice question (MCQ) responses.
• This belief suggests that initial guesses are often correct and subsequent changes may introduce errors.

Purpose of the Study:

• To investigate the impact of altering initial responses on multiple-choice question (MCQ) performance.
• To determine if changing answers, particularly for higher-achieving students, affects accuracy.

Main Methods:

• Analysis of 39,380 multiple-choice question (MCQ) responses from a large student cohort.
• Categorization of response changes into correct-to-incorrect, incorrect-to-correct, and incorrect-to-incorrect.

Main Results:

• A total of 4.62% of responses were changed, with 46.3% of these changes being incorrect-to-correct.
• The tendency to change incorrect answers to correct ones was significantly higher in high-achieving students (61%) compared to middle (42%) and lower-achieving groups (34%).
• Conversely, correct-to-incorrect changes constituted 21.9% of all alterations.

Conclusions:

• The findings challenge the conventional wisdom against changing initial MCQ responses.
• Encouraging students, especially high performers, to reconsider and change answers may lead to improved test outcomes.
• Further research could explore the cognitive strategies underlying successful answer modification.