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Journal of Educational…

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Powers, Stephen	1

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A Test of the Equipercentile Hypothesis of the TIERS Norm-Referenced Model.

Peer reviewed

Powers, Stephen; And Others – Journal of Educational Measurement, 1983

The validity of the equipercentile hypothesis of the Title I Evaluation and Reporting System norm-referenced evaluation model was examined using 3,224 seventh- and ninth-grade students. Findings from confidence interval procedures contradicted the equipercentile hypothesis. There was a pattern of large gains for students not receiving any special…

Descriptors: Achievement Gains, Evaluation Methods, Evaluation Needs, Hypothesis Testing

Use of Restricted Item Response Models for Examining Item Difficulty Ordering and Slope Uniformity.

Peer reviewed

Lane, Suzanne – Journal of Educational Measurement, 1991

The use of restricted item response models to test hypotheses regarding item difficulty ordering and slope uniformity was demonstrated in a study in which 597 algebra students were asked to solve word problems reflecting various types of cognitive processing. Benefits and limitations of the procedures are discussed. (SLD)

Descriptors: Algebra, Cognitive Ability, Cognitive Processes, Cognitive Tests