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Mathematical Models	2
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Williams, John D.	1
Yen, Wendy M.	1

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The Extent, Causes, and Importance of Context Effects on Item Parameters for Two Latent-Trait Models.

Yen, Wendy M. – 1979

The extent, causes, and importance of context effects on item parameters for one- and three-parameter latent-trait models were examined. Items were taken from the California Achievement Tests Reading Comprehension and Mathematics Concepts and Applications subtests. The reading items were administered to 1,678 fourth-grade students, and the…

Descriptors: Achievement Tests, Context Clues, Educational Testing, Elementary School Mathematics

A Comparison of Raw Gain Scores, Residual Gain Scores, and the Analysis of Covariance with Two Modes of Teaching Reading.

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Williams, John D.; And Others – 1972

Two methods of reading instruction (homogeneous grouping and graded classes) are compared for 165 students in 8 rural North Dakota schools by raw gain scores, residual gain scores, and the analysis of covariance. (CK)

Descriptors: Analysis of Covariance, Classes (Groups of Students), Comparative Analysis, Correlation