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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)
