Smith et al. (1980) calculated the efficacy of various types of treatment based on treatment outcome studies and reported that cognitive and cognitive-behavioral treatments had the largest effect sizes (d values of 1.31 and 1.24, respectively), followed by behavioral (.91), psychodynamic (.78), and humanistic treatments (.63), and, finally, developmental treatments (.42). This evidence certainly suggests that treatments are:

Question

Quizplus · Accepted Answer

The data presented in the study by Smith et al. (1980) indicate that treatments are not all equivalent and that some types of treatments are more effective than others, with cognitive and cognitive-behavioral treatments showing the largest effect sizes.

Smith Et Al