The Effect of Violating the Assumption of Equal Item Means in Estimating the Livingston Coefficient.

Lovett, Hubert T.

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Peer reviewed

ERIC Number: EJ191568

Record Type: Journal

Publication Date: 1978

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The Effect of Violating the Assumption of Equal Item Means in Estimating the Livingston Coefficient.

Lovett, Hubert T.

Educational and Psychological Measurement, v38 n2 p239-51 Sum 1978, 78

The validity of five methods of estimating the reliability of criterion-referenced tests was evaluated across nine conditions of variability among item means. The results were analyzed by analysis of variance, the Newman-Keuls test, and a nonparametric procedure. There was a tendency for all of the methods to be conservative. (Author/JKS)

Descriptors: Analysis of Variance, Criterion Referenced Tests, Item Analysis, Nonparametric Statistics, Test Reliability, Validity

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Language: English

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