The estimated Cohen's d for the related-samples t test uses the sample standard deviation for difference scores as an estimate of the standard deviation of difference scores in the population.

Question

Quizplus · Accepted Answer

This is true, as Cohen's d is calculated by dividing the mean difference score by the estimated standard deviation of difference scores, which can be found by using the sample standard deviation for difference scores as an estimate of the population standard deviation for difference scores.

The Estimated Cohen's D for the Related-Samples T Test Uses