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ERIC Number: EJ982118
Record Type: Journal
Publication Date: 2012-Aug
Pages: 22
Abstractor: As Provided
Reference Count: 31
ISBN: N/A
ISSN: ISSN-0013-1644
An Application of Explanatory Item Response Modeling for Model-Based Proficiency Scaling
Hartig, Johannes; Frey, Andreas; Nold, Gunter; Klieme, Eckhard
Educational and Psychological Measurement, v72 n4 p665-686 Aug 2012
The article compares three different methods to estimate effects of task characteristics and to use these estimates for model-based proficiency scaling: prediction of item difficulties from the Rasch model, the linear logistic test model (LLTM), and an LLTM including random item effects (LLTM+e). The methods are applied to empirical data from a German large-scale study of reading comprehension in English as a foreign language (N = 10,543). A priori defined task characteristics were used as predictors for item difficulty; the estimated effects were used to define thresholds between proficiency levels. The comparison of results indicates that the LLTM is too restrictive; the Rasch model and the LLTM+e yield similar results in terms of implications for scale anchoring. (Contains 1 note, 6 tables, and 1 figure.)
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
Identifiers - Location: Germany