In a study of 100 people with panic disorder,50 were treated with psychotherapy and 50 were treated with medication.At the end of 12 weeks of treatment,the psychotherapy group had an average score of 25 on a scale of panic severity,while the medication group had an average score of 75.This difference is called the
A)within-groups variance.
B)experimental effect.
C)internal validity.
D)none of the above.

Question

Quizplus · Accepted Answer

The difference in average scores between the two groups is referred to as the experimental effect, which indicates the effectiveness of the different treatment approaches. The within-groups variance is the variability within each group, while internal validity refers to the extent to which a study accurately measures what it intends to measure, neither of which applies to this scenario.

In a Study of 100 People with Panic Disorder,50 Were