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1 results

  • Testing for Local Dependency in Dichotomous and Polytomous Item Response Models

  • Edward Hak-sing Ip
  • Journal:
    Psychometrika / Volume 66 / Issue 1 / March 2001
    Published online by Cambridge University Press:
    01 January 2025, pp. 109-132

  • Researchers studying item response models are often interested in examining the effects of local dependency on the validity of the resulting conclusion from statistical inference. This paper focuses on the detection of local dependency. We provide a framework for viewing local dependency within dichotomous and polytomous items that are clustered by design, and present a testing procedure that allows researchers to specifically identify individual item pairs that exhibit local dependency, while controlling for false positive rate. Simulation results from the study indicate that the proposed method is effective. In addition, a discussion of its relation to other existing methods is provided.