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Multidimensional Equating
Author(s) -
Hirsch Thomas M.
Publication year - 1989
Publication title -
journal of educational measurement
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.917
H-Index - 47
eISSN - 1745-3984
pISSN - 0022-0655
DOI - 10.1111/j.1745-3984.1989.tb00338.x
Subject(s) - equating , comparability , statistics , item response theory , mathematics , mean difference , stability (learning theory) , significant difference , econometrics , psychology , psychometrics , computer science , confidence interval , machine learning , combinatorics , rasch model
Equatings were performed on both simulated and real data sets using the common‐examinee design and two abilities for each examinee (i.e., two dimensions). Item and ability parameter estimates were found by using the Multidimensional Item Response Theory Estimation (MIRTE) program. The amount of equating error was evaluated by a comparison of the mean difference and the mean absolute difference between the true scores and ability estimates found on both tests for the common examinees used in the equating. The results indicated that effective equating, as measured by comparability o f true scores, was possible with the techniques used in this study. When the stability o f the ability estimates was examined, unsatisfactory results were found.