1. Reducing the number of options on multiple-choice questions: response time, psychometrics and standard setting.
- Author
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Schneid, Stephen D, Armour, Chris, Park, Yoon Soo, Yudkowsky, Rachel, and Bordage, Georges
- Subjects
PROFESSIONAL education ,EDUCATIONAL tests & measurements ,STUDY & teaching of medicine ,PHARMACY education ,PSYCHOMETRICS ,RELIABILITY (Personality trait) ,STATISTICAL hypothesis testing ,T-test (Statistics) ,TEST-taking skills ,TIME ,COMPUTER assisted testing (Education) ,DESCRIPTIVE statistics - Abstract
Objectives Despite significant evidence supporting the use of three-option multiple-choice questions ( MCQs), these are rarely used in written examinations for health professions students. The purpose of this study was to examine the effects of reducing four- and five-option MCQs to three-option MCQs on response times, psychometric characteristics, and absolute standard setting judgements in a pharmacology examination administered to health professions students. Methods We administered two versions of a computerised examination containing 98 MCQs to 38 Year 2 medical students and 39 Year 3 pharmacy students. Four- and five-option MCQs were converted into three-option MCQs to create two versions of the examination. Differences in response time, item difficulty and discrimination, and reliability were evaluated. Medical and pharmacy faculty judges provided three-level Angoff ( TLA) ratings for all MCQs for both versions of the examination to allow the assessment of differences in cut scores. Results Students answered three-option MCQs an average of 5 seconds faster than they answered four- and five-option MCQs (36 seconds versus 41 seconds; p = 0.008). There were no significant differences in item difficulty and discrimination, or test reliability. Overall, the cut scores generated for three-option MCQs using the TLA ratings were 8 percentage points higher (p = 0.04). Conclusions The use of three-option MCQs in a health professions examination resulted in a time saving equivalent to the completion of 16% more MCQs per 1-hour testing period, which may increase content validity and test score reliability, and minimise construct under-representation. The higher cut scores may result in higher failure rates if an absolute standard setting method, such as the TLA method, is used. The results from this study provide a cautious indication to health professions educators that using three-option MCQs does not threaten validity and may strengthen it by allowing additional MCQs to be tested in a fixed amount of testing time with no deleterious effect on the reliability of the test scores. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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