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1 results

  • Influence Analysis of Ranking Data

  • Wai-Yin Poon, Wai Chan
  • Journal:
    Psychometrika / Volume 67 / Issue 3 / September 2002
    Published online by Cambridge University Press:
    01 January 2025, pp. 421-436

  • This paper develops diagnostic measures to identify those observations in Thurstonian models for ranking data which unduly influence parameter estimates that are obtained by the partition maximum likelihood approach of Chan and Bentler (1998). Diagnostic measures are constructed by employing the local influence approach that uses geometric techniques to assess the effect of small perturbations on a postulated statistical model. Very little additional effort is required to compute the proposed diagnostic measures, because all of the necessary building blocks are readily available after a usual fit of the model.