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Duncan, Ann2
Perkins, Kyle2
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Perkins, Kyle; Duncan, Ann – 1988
An item discriminability study of the Iowa Tests of Basic Skills Language Skills tests identified test items that are robust discriminators, psychometrically capable of separating low scorers from higher scorers in the language tests battery. The analysis was conducted by calculating a point-biserial correlation for each item on the four language…
Descriptors: Correlation, Item Analysis, Language Skills, Language Tests
Perkins, Kyle; Duncan, Ann – 1987
An assessment analysis was performed to determine whether sets of items designed to measure three different subskills of reading comprehension of the Iowa Tests of Basic Skills (ITBSs) did, in fact, distinguish among these subskills. The three major skills objectives were: (1) facts; (2) generalizations; and (3) inferences. Data from…
Descriptors: Construct Validity, Elementary School Students, Functional Reading, Generalization