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- Title
Evaluating Common Item Block Options when Faced with Practical Constraints.
- Authors
Wolkowitz, Amanda; Davis-Becker, Susan
- Abstract
This study evaluates the impact of common item characteristics on the outcome of equating in credentialing examinations when traditionally recommended representation is not possible. This research used real data sets from several credentialing exams to test the impact of content representation, item statistics, and number of common items on equating results. The results of this research suggests that it may not be necessary to have a common item block that is strictly proportional in content or difficulty to the entire exam if the exam is unidimensional. The results also suggest that it may be beneficial to use all common items between two forms for equating instead of focusing on a smaller anchor block.
- Subjects
EXAMINATION item analysis; ITEM response theory; BIG data
- Publication
Practical Assessment, Research & Evaluation, 2015, Vol 20, Issue 19, p1
- ISSN
1531-7714
- Publication type
Article