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Invariance of Score Linkings Across Gender Groups for Forms of a Testlet-Based College-Level Examination Program Examination

Educational Testing Service, wyang{at}ets.org

Rui Gao

Educational Testing Service

This study investigates whether the functions linking number-correct scores to the College-Level Examination Program (CLEP) scaled scores remain invariant over gender groups, using test data on the 16 testlet-based forms of the CLEP College Algebra exam. To be consistent with the operational practice, linking of various test forms to a common reference form is based on the Rasch model. Equatability indices proposed by Dorans and Holland (2000) were used to evaluate linking invariance over gender subpopulations. Overall, linkings based on the gender groups are very similar to linkings for the total group. At all score levels, differences between subgroup and total group linkings are smaller than the difference that will affect the pass/fail decision for CLEP candidates. On only one form, linking based on the male group would pass slightly more candidates than linking for the total group at the recommended CLEP cut score of 50 due to rounding.

Key Words: Index terms: test equating • linking • invariance of linking • equatability

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This Article Abstract Free Full Text (Free PDF) Free Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (4) Citing Articles via Google Scholar Google Scholar Articles by Yang, W.-L. Articles by Rui Gao, Search for Related Content Social Bookmarking                   What's this?