On Test Homogeneity and Maximum KR-20.

Raju, Nambury S.

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Peer reviewed

ERIC Number: EJ262598

Record Type: Journal

Publication Date: 1982

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On Test Homogeneity and Maximum KR-20.

Raju, Nambury S.

Educational and Psychological Measurement, v42 n1 p145-52 Spr 1982

A necessary and sufficient condition for a perfectly homogeneous test in the sense of Loevinger is stated and proved. Using this result, a formula for computing the maximum possible KR-20 when the test variance is assumed fixed is presented. A new index of test homogeneity is also presented and discussed. (Author/BW)

Descriptors: Mathematical Formulas, Mathematical Models, Multiple Choice Tests, Test Reliability

Publication Type: Journal Articles; Reports - Research

Education Level: N/A

Audience: N/A

Language: English

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