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Download full textZwick, Rebecca – 1986
Reading test data from the National Assessment of Educational Progress (NAEP) were scaled using the unidimensional item response theory model. Data were collected for students aged 9, 13, and 17. To determine whether the responses to the reading items were consistent with unidimensionality, four different methods were applied: (1) principal…
Descriptors: Correlation, Educational Assessment, Elementary Secondary Education, Factor Analysis
