The __________ is a statistical measure of the effectiveness of psychological treatment.
A)effect size
B)outcome index
C)validity coefficient
D)clinical correlation

Question

Quizplus · Accepted Answer

Effect size is a statistical concept that quantifies the difference between two groups' means in comparison to the variability of the groups. In the context of psychological treatment, it measures the effectiveness of the treatment by indicating how much change can be attributed to the intervention compared to a control or comparison condition.

The __________ Is a Statistical Measure of the Effectiveness of Psychological