Estimation of Latent Ability and Item Parameters When There Are Omitted Responses.

Lord, Frederic M.

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Peer reviewed

ERIC Number: EJ108442

Record Type: CIJE

Publication Date: 1974

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Estimation of Latent Ability and Item Parameters When There Are Omitted Responses

Lord, Frederic M.

Psychometrika, 39, 2, 247-64, Jun 74

Omitted items cannot properly be treated as wrong when estimating ability and item parameters. A convenient method for utilizing the information provided by omissions is presented. Theoretical and empirical justifications are presented for the estimates obtained by the new method. (Author)

Descriptors: Academic Ability, Guessing (Tests), Item Analysis, Latent Trait Theory, Models, Multiple Choice Tests, Response Style (Tests), Statistical Analysis, Test Validity, Testing Problems, True Scores

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