A Clinical Psychologist Is Interested in Comparing the Effectiveness of Short

question 22

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. Assume you are doing post hoc testing between cognitive behavioral therapy and relaxation therapy, using the Scheffé test. Given the following values obtained from the ANOVA: , , , n ₁ = n ₂ = n ₃ = 5, k = 3, df _between = 2, df _within = 12, MS_within = 1.900, the value of SS _{between ( groups i and j)} = _________.

• A) 25.600
• B) 173.333
• C) 3.600
• D) 10.000

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Definitions:

Naturalistic Observation

An observational method where subjects are examined in their natural habitat, without any alterations made by the scientist.

Case Study

An in-depth examination of a single subject, group, event, or situation over a period of time for the purpose of detailed understanding and research.

Correlational Method

A scientific approach to research that involves studying the relationship between two variables to determine if a connection exists.

Political Polls

Surveys or studies conducted to gauge public opinion on political matters, candidates, or policies, often used to predict election outcomes or understand societal trends.