An Empirical Study of Various Indices for Determining Unidimensionality.

Hattie, John

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Peer reviewed

ERIC Number: EJ313079

Record Type: Journal

Publication Date: 1984

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An Empirical Study of Various Indices for Determining Unidimensionality.

Hattie, John

Multivariate Behavioral Research, v19 n1 p49-78 Jan 1984

This paper describes a simulation that determines the adequacy of various indices as decision criteria for assessing unidimensionality. Using the sum of absolute residuals from the two-parameter latent trait model, indices were obtained that could discriminate between one latent trait and more than one latent trait. (Author/BW)

Descriptors: Achievement Tests, Latent Trait Theory, Mathematical Models, Monte Carlo Methods, Test Items, Test Validity

Publication Type: Journal Articles; Reports - Research

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Language: English

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