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1 results

  • Aggregate Item Response Analysis

  • Gordon G. Bechtel, Chezy Ofir
  • Journal:
    Psychometrika / Volume 53 / Issue 1 / March 1988
    Published online by Cambridge University Press:
    01 January 2025, pp. 93-107

  • A stochastic postulate is given for the multiple-item, successive-intervals scaling of populations. The logistic equivalent of this postulate provides an aggregate item response model in which a unidimensional submodel may be nested. This reduction provides a subtractive conjoint measurement of several items and stimuli on the same latent scale. Generalized-least-squares methods are used to estimate and test the multiple-item model, and its unidimensional reduction, on aggregate survey responses. The entire procedure is illustrated with an analysis of semantic-differential attitude data. This analysis exhibits an item selection procedure that is applicable to various social constructs.