ERIC Number: EJ1171127
Record Type: Journal
Publication Date: 2018
Abstractor: As Provided
An Alternative to the 3PL: Using Asymmetric Item Characteristic Curves to Address Guessing Effects
Lee, Sora; Bolt, Daniel M.
Journal of Educational Measurement, v55 n1 p90-111 Spr 2018
Both the statistical and interpretational shortcomings of the three-parameter logistic (3PL) model in accommodating guessing effects on multiple-choice items are well documented. We consider the use of a residual heteroscedasticity (RH) model as an alternative, and compare its performance to the 3PL with real test data sets and through simulation analyses. Our results suggest advantages to the RH approach, including closer fit to real data, more interpretable parameter estimates, and greater psychological plausibility.
Descriptors: Statistical Analysis, Models, Guessing (Tests), Multiple Choice Tests, Comparative Analysis
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Publication Type: Journal Articles; Reports - Research
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