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Applied Psychological Measurement
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What's this?

Reliability of Speeded Number-Right Multiple-Choice Tests

Yigal Attali

Educational Testing Service, yattali{at}ets.org

Contrary to common belief, reliability estimates of number-right multiple-choice tests are not inflated by speededness. Because examinees guess on questions when they run out of time, the responses to these questions generally show less consistency with the responses of other questions, and the reliability of the test will be decreased. The surprising implication is that adding questions to a multiple-choice test may lower its reliability when the test is speeded. This article develops the mathematical derivations and shows the effects of speededness on reliability in simulations.

Key Words: reliability • speededness • multiple-choice tests

Applied Psychological Measurement, Vol. 29, No. 5, 357-368 (2005)
DOI: 10.1177/0146621605276676
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This article has been cited by other articles:


Home page
 Applied Psychological MeasurementHome page
S. L. Wise and C. E. DeMars
A Clarification of the Effects of Rapid Guessing on Coefficient {alpha}: A Note on Attali's ''Reliability of Speeded Number-Right Multiple-Choice Tests''
Applied Psychological Measurement, September 1, 2009; 33(6): 488 - 490.
[PDF]

Home page
 Educational and Psychological MeasurementHome page
C. A. W. Glas and J. L. Pimentel
Modeling Nonignorable Missing Data in Speeded Tests
Educational and Psychological Measurement, December 1, 2008; 68(6): 907 - 922.
[Abstract] [PDF]