The Reliability of a Dichotomous Test-Item: A

Knapp, Thomas R.

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Peer reviewed

ERIC Number: EJ174748

Record Type: CIJE

Publication Date: 1977

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The Reliability of a Dichotomous Test-Item: A "Correlationless" Approach

Knapp, Thomas R.

Journal of Educational Measurement, 14, 3, 237-52, F 77

The test-retest reliability of one single dichotomous item is discussed. Various indices are derived for summarizing the stability of a dichotomy, based on the concept of Platonic true scores. Both open-ended and multiple choice items are considered. (Author/JKS)

Descriptors: Correlation, Elementary Education, Item Analysis, Response Style (Tests), Test Items, Test Reliability, True Scores

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