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Download full textBeaton, Albert E.; Johnson, Eugene G. – 1990
When the Educational Testing Service became the administrator of the National Assessment of Educational Progress (NAEP) in 1983, it introduced scales based on item response theory (IRT) as a way of presenting results of the assessment to the general public. Some properties of the scales and their uses are discussed. Initial attempts at presenting…
Descriptors: Academic Achievement, Data Interpretation, Educational Assessment, Elementary Secondary Education
