One commonly used index of effect size is obtained by:
A) dividing the difference between means by the standard error of measurement
B) dividing the difference between means by the standard error of the mean
C) dividing the difference between means by the standard deviation of the control group
D) none of the above

Question

Quizplus · Accepted Answer

The commonly used index of effect size, known as Cohen's d, is calculated by dividing the difference between means by the standard deviation of the control group.

One Commonly Used Index of Effect Size Is Obtained By