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Peer reviewedZwick, Rebecca – Educational Measurement: Issues and Practice, 1991
Item parameter estimates derived through item response theory methods have been considered relatively robust to changes in item position and context, but the anomaly in reading scores from the 1986 National Assessment of Educational Progress (NAEP) illustrates problems with common population equating procedures when there are test form changes.…
Descriptors: Achievement Tests, Context Effect, Equated Scores, Estimation (Mathematics)
Download full textBolt, Daniel; Ackerman, Terry – 1994
The 1993 Illinois Goal Assessment Program (IGAP) Reading Tests measured reading comprehension using both narrative and expository reading passages. Noticeable differences in mean scaled scores occurred depending on whether the 1993 results were equated back to the 1992 narrative test or the 1993 expository test (Hsu and Ackerman, 1994). In an…
Descriptors: Achievement, Context Effect, Correlation, Educational Objectives
