ERIC Number: ED419007
Record Type: Non-Journal
Publication Date: 1997
Reference Count: N/A
Observed-Score Equating as a Test Assembly Problem.
van der Linden, Wim J.; Luecht, Richard M.
A set of linear conditions on the item response functions is derived that guarantees identical observed-score distributions on two test forms. The conditions can be added as constraints to a linear programming model for test assembly that assembles a new test form to have an observed-score distribution optimally equated to the distribution of the old form. For a well-designed item pool, use of the model results into observed-score pre-equating and prevents the necessity of post hoc equating by a conventional observed-score equating method. An empirical example illustrates the use of the model for an item pool from the Law School Admission Test (LSAT). (Contains 6 figures and 33 references.) (Author/SLD)
Descriptors: Equated Scores, Foreign Countries, Higher Education, Item Response Theory, Linear Programming, Observation, Test Construction, Test Format
Faculty of Educational Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
Publication Type: Reports - Evaluative
Education Level: N/A
Authoring Institution: Twente Univ., Enschede (Netherlands). Faculty of Educational Science and Technology.
Identifiers - Assessments and Surveys: Law School Admission Test