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Kato, Kentaro; Moen, Ross E.; Thurlow, Martha L. – Educational Measurement: Issues and Practice, 2009
Large data sets from a state reading assessment for third and fifth graders were analyzed to examine differential item functioning (DIF), differential distractor functioning (DDF), and differential omission frequency (DOF) between students with particular categories of disabilities (speech/language impairments, learning disabilities, and emotional…
Descriptors: Learning Disabilities, Language Impairments, Behavior Disorders, Affective Behavior