Given the following values for an undesirable outcome variable such as number of incidents of verbal abuse, the Cohen's d effect size is: Experimental group mean = 5
Control group mean = 8
Standard deviation = 2
A)+ 3.0
B)- 3.0
C)+ 1.5
D)- 1.5

Question

Quizplus · Accepted Answer

Cohen's d is calculated as the difference between two means divided by the standard deviation. Here, it is (5 - 8) / 2 = -3 / 2 = -1.5, which is option D, but since only the magnitude is considered for Cohen's d, +1.5 is the correct representation.

Given the Following Values for an Undesirable Outcome Variable Such