ERIC Number: EJ1063650
Record Type: Journal
Publication Date: 2015-Jun
Abstractor: As Provided
Reference Count: 23
Equating without an Anchor for Nonequivalent Groups of Examinees
Longford, Nicholas T.
Journal of Educational and Behavioral Statistics, v40 n3 p227-253 Jun 2015
An equating procedure for a testing program with evolving distribution of examinee profiles is developed. No anchor is available because the original scoring scheme was based on expert judgment of the item difficulties. Pairs of examinees from two administrations are formed by matching on coarsened propensity scores derived from a set of background variables. These two subsets of scores are then equated, treating the associated sets of test performances as equivalent. The method is applied to the scores in 2 years of a testing program for admission to tertiary education.
Descriptors: Equated Scores, Testing Programs, College Entrance Examinations, Scoring, Test Items, Difficulty Level, Probability, Statistical Analysis, Weighted Scores
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Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education; Postsecondary Education
Authoring Institution: N/A