A Note on the Relation between Coefficient Alpha and Guttmans's "Split-Half" Lower Bounds.

Jackson, Paul H.

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ERIC Number: EJ208818

Record Type: Journal

Publication Date: 1979-Jun

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A Note on the Relation between Coefficient Alpha and Guttmans's "Split-Half" Lower Bounds.

Jackson, Paul H.

Psychometrika, v44 n2 p251-52 Jun 1979

Use of the same term "split-half" for division of an n-item test into two subtests containing equal (Cronbach), and possibly unequal (Guttman), numbers of items sometimes leads to a misunderstanding about the relation between Guttman's maximum split-half bound and Cronbach's coefficient alpha. This distinction is clarified. (Author/JKS)

Descriptors: Item Analysis, Mathematical Formulas, Technical Reports, Test Reliability

Publication Type: Journal Articles; Reports - Research

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Language: English

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