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. 
Estimate the size of the effect. ç 2 = _________.
Definitions:
Uncertainty Avoidance
A cultural dimension that describes the extent to which people in a society are uncomfortable with ambiguity and risk.
Individual Differences
The way in which factors such as skills, abilities, personalities, perceptions, attitudes, values, and ethics differ from one individual to another.
Consensus
A general agreement among members of a specific group or community.
Glass Ceiling
A transparent barrier that keeps women from rising above a certain level in organizations.
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