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ERIC Number: EJ1129536
Record Type: Journal
Publication Date: 2017
Pages: 22
Abstractor: As Provided
ISSN: ISSN-1530-5058
Investigating Separate and Concurrent Approaches for Item Parameter Drift in 3PL Item Response Theory Equating
Arce-Ferrer, Alvaro J.; Bulut, Okan
International Journal of Testing, v17 n1 p1-22 2017
This study examines separate and concurrent approaches to combine the detection of item parameter drift (IPD) and the estimation of scale transformation coefficients in the context of the common item nonequivalent groups design with the three-parameter item response theory equating. The study uses real and synthetic data sets to compare the two approaches based on IPD flagging rates, type I error and power rates, and recovery of scale transformation coefficients. Results indicate that the two approaches render similar outcomes with stable anchor sets. However, they can produce dissimilar results with unstable anchor sets because of differences in the performance of their IPD components. Further, the findings of this study caution about working backward from equated cut scores to motivate the selection of an anchor set.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A