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Download full textStoneberg, Bert D. – Idaho State Department of Education, 2004
Differential item functioning (DIF) occurs when the responses of students with approximately equal ability differ systematically based on their group membership. Idaho contracted with the Northwest Evaluation Association (NWEA) to provide the Idaho Standards Achievement Tests of reading, language arts and mathematics at grades 4, 8 and 10. The…
Descriptors: State Standards, Standardized Tests, Test Items, Item Analysis
Direct linkHauser, Carl; Kingsbury, Gage – Northwest Evaluation Association, 2004
This study was designed to answer two key questions about the fixed portions of the fourth, eighth, and tenth grade spring 2003 Idaho Standards Achievement Tests (ISAT) in Reading, Language Usage and Mathematics: (1) To what extent do test items exhibit substantive differences in functioning across student groups formed based on ethnicity and…
Descriptors: Grade 4, Grade 8, Grade 10, Test Items
