Does adaptive testing violate local independence?

Robert J. Mislevy, Hua Hua Chang

Research output: Contribution to journalArticlepeer-review

Abstract

Item response theory posits "local independence," or conditional independence of item responses given item parameters and examinee proficiency parameters. The usual definition of local independence, however, addresses the context of fixed tests, and initially appears to yield incorrect response-pattern probabilities in the context of adaptive testing. The paradox is resolved by introducing additional notation to deal with the item selection mechanism.

Original languageEnglish (US)
Pages (from-to)149-156
Number of pages8
JournalPsychometrika
Volume65
Issue number2
DOIs
StatePublished - Jun 2000
Externally publishedYes

Keywords

  • Adaptive testing
  • Conditional independence
  • Item response theory (irt)
  • Local independence

ASJC Scopus subject areas

  • Mathematics (miscellaneous)
  • General Psychology
  • Psychology (miscellaneous)
  • Social Sciences (miscellaneous)

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