The polyserial correlation coefficient

  • Olsson U
  • Drasgow F
  • Dorans N
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Abstract

The polyserial and point polyserial correlations are discussed as generalizations of the biserial and point biserial correlations. The relationship between the polyserial and point polyserial correlation is derived. The maximum likelihood estimator of the polyserial correlation is compared with a two-step estimator and with a computationally convenient ad hoc estimator. All three estimators perform reasonably well in a Monte Carlo simulation. Some practical applications of the polyserial correlation are described.

Author-supplied keywords

  • dichotomous variables
  • latent variables
  • point polyserial correlation
  • polychotomous variables

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Authors

  • Ulf Olsson

  • Fritz Drasgow

  • Neil J. Dorans

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