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A Study of Modified-Guttman and IRT-Based Level Scoring Procedures for Work Keys Assessments. ACT Research Report Series 97-7.
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Schulz, E. Matthew; Kolen, Michael J.; Nicewander, W. Alan – 1997
This paper compares modified Guttman and item response theory (IRT) based procedures for classifying examinees in ordered levels when each level is represented by several multiple choice test items. In the modified Guttman procedure, within-level number correct scores are mapped to binary level mastery scores. Examinees are then assigned to levels…
Descriptors: Classification, Comparative Analysis, Item Response Theory, Mathematics Tests