Equating Without an Anchor for Nonequivalent Groups of Examinees

被引:10
|
作者
Longford, Nicholas T. [1 ,2 ]
机构
[1] SNTL, Manchester, Lancs, England
[2] Univ Pompeu Fabra, Dept Econ & Business, Barcelona 08005, Spain
关键词
causal analysis; equating; inverse proportional weighting; kernel smoothing; matching; propensity scores; PROPENSITY SCORE; CAUSAL INFERENCE; MATCHING METHODS;
D O I
10.3102/1076998615574773
中图分类号
G40 [教育学];
学科分类号
040101 ; 120403 ;
摘要
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.
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页码:227 / 253
页数:27
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