Miguel Conducts a Study in Which He Compares the Effectiveness

Multiple Choice

Miguel conducts a study in which he compares the effectiveness of behavioral therapy, cognitive therapy, humanistic therapy, and psychodynamic therapy to treat phobias. In this study, the independent variable is _________ and it has ____ level(s) .

A) type of therapy; one
B) type of therapy; four
C) effectiveness of therapy; one
D) effectiveness of therapy; four