Smith,Glass,and Miller (1980)compared the efficacy of various types of treatment and found that the treatments with the largest to smallest effect sizes were,respectively,

Question

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Smith, Glass, and Miller (1980) found that cognitive-behavioural therapy had the largest effect size, followed by behavioural therapy, psychodynamic therapy, and humanistic therapy. Therefore, option D is the best choice as it lists the therapies in the correct order of their effect sizes. The other options have incorrect orders.

Smith,Glass,and Miller (1980)compared the Efficacy of Various Types of Treatment