Click on the following links. Please note these will open in a new window.

This website assists in interpreting biserial correlation coefficients.

This website provides a chart that explains effect size and how it relates to Cohen’s d.

This website helps to differentiate all the different correlation coefficients, including point-biserial correlation coefficients.

This website defines a confidence interval and describes how it applies to effect size in psychological studies.

This website explains the relationship between p value, sample size, and effect size.