17. A psychologist is interested in studying the effectiveness of different ther

Question

17. A psychologist is interested in studying the effectiveness of different therapies for depression. The psychologist selects 90 clients and randomly assigns thirty to each of the following groups: cognitive-behavioral treatment, psychodynamic psychotherapy, or client-centered treatment. The dependent measure is a score on a depression inventory after 4 weeks of treatment. The psychologist wants to test the claim that all three therapies are equally effective in reducing symptoms of depression.

(a) Which statistical approach should be used?

confidence interval

t-test

ANOV A

Chi square

(b) Explain the rationale for your selection in (a). Specifically, why would this be the appropriate statistical approach?

Explanation / Answer

a) ANOVA

b) Here The psychologist selects 90 clients and randomly assigns thirty to each and testing wheather all the three therapies are equally effective in reducing symptoms of depression or not, multiple mean are comparing here so this is so it is ANOVA

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