In their study of cognitive-behavioural therapy in the treatment of generalized anxiety, Quebec researchers Laberge, Dugas, and Ladouceur (2000)found that internal validity was improved with the inclusion of:
A)A control group
B)Matched environments
C)An experimental treatment
D)More participants

Question

Quizplus · Accepted Answer

The inclusion of a control group allows for the comparison of the treatment group's outcomes to those who did not receive the treatment. This increases the internal validity of the study by controlling for extraneous variables that could affect the results.

In Their Study of Cognitive-Behavioural Therapy in the Treatment of Generalized