The Performance of DIMTEST When Latent Trait and Item Difficulty Distributions Differ.

Seraphine, Anne E.

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Peer reviewed

ERIC Number: EJ605900

Record Type: Journal

Publication Date: 2000-Mar

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ISSN: ISSN-0146-6216

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The Performance of DIMTEST When Latent Trait and Item Difficulty Distributions Differ.

Seraphine, Anne E.

Applied Psychological Measurement, v24 n1 p82-94 Mar 2000

Examined the performance of DIMTEST, through simulation, for unidimensional and two-dimensional data that exhibited ceiling effects generated through changes in location and scale of the theta distribution. Results indicate that the power of DIMTEST is reduced as the location shifts upward and the scale shifts downward. Considers the selection assessment subtest 1 items through expert judgments (SLD)

Descriptors: Difficulty Level, Item Response Theory, Monte Carlo Methods

Publication Type: Journal Articles; Reports - Evaluative

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Audience: N/A

Language: English

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