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ERIC Number: EJ1014609
Record Type: Journal
Publication Date: 2013
Pages: 22
Abstractor: As Provided
ISSN: ISSN-0022-0655
Modeling Item-Position Effects within an IRT Framework
Debeer, Dries; Janssen, Rianne
Journal of Educational Measurement, v50 n2 p164-185 Sum 2013
Changing the order of items between alternate test forms to prevent copying and to enhance test security is a common practice in achievement testing. However, these changes in item order may affect item and test characteristics. Several procedures have been proposed for studying these item-order effects. The present study explores the use of descriptive and explanatory models from item response theory for detecting and modeling these effects in a one-step procedure. The framework also allows for consideration of the impact of individual differences in position effect on item difficulty. A simulation was conducted to investigate the impact of a position effect on parameter recovery in a Rasch model. As an illustration, the framework was applied to a listening comprehension test for French as a foreign language and to data from the PISA 2006 assessment. (Contains 6 tables and 3 figures.)
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Publication Type: Journal Articles; Reports - Research
Education Level: Grade 8; Secondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Belgium; Turkey
Identifiers - Assessments and Surveys: Program for International Student Assessment
Grant or Contract Numbers: N/A