Comparison of IRT Observed-Score and True-Score 'Equatings'.

Abstract

Two methods of 'equating' tests using item response theory are compared, one using true scores, the other using estimated observed scores. On the data studied, they yield almost indistinguishable results. This is a reassuring result for users of IRT equating methods. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1983
Accession Number
ADA133871

Entities

People

  • Frederic M. Lord
  • Marilyn S. Wingersky

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  • Educational Testing Service

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