GATE (Graduate Aptitude Test in Engineering) Psychology Research Methods and Statistics-Special Correlation Methods Study Material (Page 1 of 2)

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Special Correlation Methods: Biserial Correlation Coefficient


Biserial Correlation Coefficient

  • Biserial Correlation Coefficient is used where there are two sets of scores for the same people or for two matched groups.
  • It is applicable when one of the variables is dichotomous ordinal data and also must have an …

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Special Correlation Methods: Point Biserial Correlation


Point Biserial Correlation

A point-biserial correlation is used to measure the strength and direction of the association that exists between one continuous variable and one dichotomous variable. In this case variables are measured on a dichotomous scale.


  • One of the variables in the given study must be measured on a continuous scale. For example, the measurement of intelligence with IQ scale is a continuous variable or weight measured in kilograms.
  • Among the two variables, one variable must be a dichotomous variable. The …

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