Robustness of IRT Parameter Estimation to Violations of the Undimensionality Assumption.

Harrison, David A.

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Peer reviewed

ERIC Number: EJ350190

Record Type: Journal

Publication Date: 1986

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Robustness of IRT Parameter Estimation to Violations of the Undimensionality Assumption.

Harrison, David A.

Journal of Educational Statistics, v11 n2 p91-115 Sum 1986

Multidimensional item response data were created. The strength of a general factor, the number of common factors, the distribution of items loadingon common factors, and the number of items in simulated tests were manipulated. LOGIST effectively recovered both item and trait parameters in nearly all of the experimental conditions. (Author/JAZ)

Descriptors: Adaptive Testing, Computer Assisted Testing, Computer Simulation, Correlation, Estimation (Mathematics), Factor Analysis, Latent Trait Theory, Mathematical Models, Statistical Studies, Test Items, Test Theory

Publication Type: Journal Articles; Reports - Research

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Audience: N/A

Language: English

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