David B. Wilson, PhD, George Mason University
Version date: 2023.11.27
Correlation (point-biserial) with unequal Ns
Notes: This method is for converting a point-biserial correlation into Cohen’s d and Hedges’ g. A point-biserial correlation is a correlation between a dichotomous variable, such as treatment vs. control, and a scaled variable. This method allows you to specify the sample sizes separately for the two conditions.
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