Smith Et Al

Multiple Choice

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:

A) All equivalent
B) Not all equivalent
C) Pretty similar
D) None of these