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ERIC Number: ED189098
Record Type: RIE
Publication Date: 1979-Jun-28
Reference Count: 0
A Test of the Adequacy of Curvilinear Score Equating Models.
Marco, Gary L.; And Others
Data from the verbal portion of the College Entrance Examination Board Scholastic Aptitude Tests were used in an experimental test of the accuracy of equating for a variety of models in three categories: linear equating, equipercentile equating, and item characteristic curve equating. The models were tested for both mean squared error and bias. These methods were used to equate a test to itself, to another parallel test, and to another test that differed in difficulty. Samples used in the equating were designed to be either random or to be different from each other in ability. Equating was based on subsamples of 1577 cases selected from samples of 4731 cases. Criterion equatings used all the cases in each sample and used either item characteristic curve equipercentile methods or direct observed score equipercentile methods. A number of conclusions were developed indicating that the most effective type of equating depended on the characteristics of the tests and the samples being analyzed. (CTM)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Sponsor: Educational Testing Service, Princeton, NJ.; College Entrance Examination Board, New York, NY.
Authoring Institution: Educational Testing Service, Princeton, NJ.
Identifiers: Classical Test Theory; Equipercentile Equating; Scholastic Aptitude Test
Note: Paper presented at the Computerized Adaptive Testing Conference (Minneapolis, MN, June 27-30, 1979).