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ERIC Number: EJ1053371
Record Type: Journal
Publication Date: 2015
Pages: 15
Abstractor: As Provided
Reference Count: N/A
ISBN: N/A
ISSN: ISSN-0022-0655
Asymptotic Standard Errors for Item Response Theory True Score Equating of Polytomous Items
Cher Wong, Cheow
Journal of Educational Measurement, v52 n1 p106-120 Spr 2015
Building on previous works by Lord and Ogasawara for dichotomous items, this article proposes an approach to derive the asymptotic standard errors of item response theory true score equating involving polytomous items, for equivalent and nonequivalent groups of examinees. This analytical approach could be used in place of empirical methods like the bootstrap method, to obtain standard errors of equated scores. Formulas are introduced to obtain the derivatives for computing the asymptotic standard errors. The approach was validated using mean-mean, mean-sigma, random-groups, or concurrent calibration equating of simulated samples, for tests modeled using the generalized partial credit model or the graded response model.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A