Approximating the conditional distribution of person fit indexes for checking the rasch model

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10 Scopus citations

Abstract

We present a simple approximation to the conditional distribution of goodness-of-fit statistics for the Rasch model, assuming that the item difficulties are known. The approximation is easily programmed, and gives relatively accurate assessments of conditional p-values for tests of length 10 or more. A few generalizations are discussed.

Original languageEnglish (US)
Pages (from-to)191-199
Number of pages9
JournalPsychometrika
Volume62
Issue number2
DOIs
StatePublished - Jun 1997
Externally publishedYes

Keywords

  • Edgeworth expansion
  • Exact p-value
  • Saddlepoint approximation

ASJC Scopus subject areas

  • Psychology(all)
  • Applied Mathematics

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