A New Item Response Theory Modeling Approach with Applications to Unidimensionality Assessment and Ability Estimation.

Stout, William F.

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Peer reviewed

ERIC Number: EJ414318

Record Type: Journal

Publication Date: 1990

Pages: N/A

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ISSN: ISSN-0033-3123

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A New Item Response Theory Modeling Approach with Applications to Unidimensionality Assessment and Ability Estimation.

Stout, William F.

Psychometrika, v55 n2 p293-325 Jun 1990

Using an infinite item test framework, it is argued that the usual assumption of local independence should be replaced by a weaker assumption--essential independence. The usual assumption of unidimensionality is replaced by a weaker and more appropriate statistically testable assumption of essential unidimensionality. (TJH)

Descriptors: Ability Identification, Equations (Mathematics), Estimation (Mathematics), Item Response Theory, Mathematical Models, Multidimensional Scaling, Nonparametric Statistics, Predictor Variables

Publication Type: Journal Articles; Reports - Evaluative

Education Level: N/A

Audience: N/A

Language: English

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Author Affiliations: N/A