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ERIC Number: EJ968055
Record Type: Journal
Publication Date: 2012-Jun
Pages: 16
Abstractor: As Provided
Reference Count: 21
ISBN: N/A
ISSN: ISSN-0146-6216
The Problem of Bias in Person Parameter Estimation in Adaptive Testing
Doebler, Anna
Applied Psychological Measurement, v36 n4 p255-270 Jun 2012
It is shown that deviations of estimated from true values of item difficulty parameters, caused for example by item calibration errors, the neglect of randomness of item difficulty parameters, testlet effects, or rule-based item generation, can lead to systematic bias in point estimation of person parameters in the context of adaptive testing. This effect occurs even when the errors of the item difficulty parameters are themselves unbiased. Analytical calculations as well as simulation studies are discussed. (Contains 7 figures, 3 tables and 1 note.)
SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A