A Clinical Psychologist Is Interested in Comparing the Effectiveness of Short

question 146

Multiple Choice

A clinical psychologist is interested in comparing the effectiveness of short term relaxation and cognitive-behavioral therapy in treating mild depression. An experiment is conducted in which 15 patients with mild depression are randomly selected and assigned 5 each to a relaxation therapy group, a cognitive/behavioral therapy group, and an attention placebo group. Therapy is administered until the patient is judged no longer depressed or until 10 treatment sessions have elapsed. The following data is obtained. Scores are the number of sessions for each patient. Doing planned comparisons, using a = 0.05, the critical value is _________.

• A) ± 2.179
• B) - 1.782
• C) ±2.681
• D) 2.145

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Definitions:

External Cost

A cost borne by individuals or society that is not reflected in the market price of a good or service, often associated with negative externalities.

Socially Optimal

A condition or point at which the welfare of a society reaches its highest possible level, considering all factors and resources.

Demand Curve

A graphical representation of the relationship between the price of a good and the quantity demanded.

Supply Curve

A graphical representation showing the relationship between the price of a good or service and the quantity of that good that suppliers are willing and able to provide.