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1 results

  • Continuous and Discrete Latent Structure Models for Item Response Data

  • Edward H. Haertel
  • Journal:
    Psychometrika / Volume 55 / Issue 3 / September 1990
    Published online by Cambridge University Press:
    01 January 2025, pp. 477-494

  • Relations are examined between latent trait and latent class models for item response data. Conditions are given for the two-latent class and two-parameter normal ogive models to agree, and relations between their item parameters are presented. Generalizations are then made to continuous models with more than one latent trait and discrete models with more than two latent classes, and methods are presented for relating latent class models to factor models for dichotomized variables. Results are illustrated using data from the Law School Admission Test, previously analyzed by several authors.