Comparison of Item Preequating and Random Groups Equating Using IRT and Equipercentile Methods.

Kolen, Michael J.; Harris, Deborah J.

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ERIC Number: EJ412510

Record Type: Journal

Publication Date: 1990

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Comparison of Item Preequating and Random Groups Equating Using IRT and Equipercentile Methods.

Kolen, Michael J.; Harris, Deborah J.

Journal of Educational Measurement, v27 n1 p27-39 Spr 1990

Item-preequating and random groups designs were used to equate forms of the American College Testing Assessment Mathematics Test for over 36,000 students. Equipercentile and three-parameter logistic model item response theory (IRT) procedures were used for both designs. The pretest methods did not compare well with the random groups method. (SLD)

Descriptors: College Entrance Examinations, Comparative Analysis, Equated Scores, High School Students, High Schools, Item Response Theory, Mathematics Tests, Pretests Posttests, Test Format

Publication Type: Journal Articles; Reports - Research

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Language: English

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