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The Effect of the Position of an Item Within a Test on Item Responding Behavior: An Analysis Based on Item Response Theory GREB GRE IRT

Author(s):
Dorans, Neil J.; Kingston, Neal M.
Publication Year:
1982
Report Number:
RR-82-22, GREB-79-12bP (1982)
Source:
ETS Research Report
Document Type:
Report
Page Count:
28
Subject/Key Words:
Graduate Record Examinations Board, Equated Scores, Graduate Record Examinations (GRE), Item Analysis, Item Response Theory (IRT), Responses, Test Construction, Test Theory

Abstract

If an item type exhibits a within-test context effect, any equating method, e.g., IRT based equating, that uses item data either directly or as part of an equating section score should provide for administration of the items in the same position in the old and new forms. Although a within-test context effect might have a negligible influence on a single equating, a chain of such equatings might drift because of the systematic bias.

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