In 1975, Sloane and colleagues conducted a controlled study designed to investigate the effectiveness of psychotherapy. These researchers found that after 4 months:
a. clients who received either psychodynamic or behavioral therapy showed significantly more improvement than the control group
b. only clients who received psychodynamic therapy showed significantly more improvement than the control group
c. only clients who received behavioral therapy showed significantly more improvement than the control group
d. there was no significant improvement in either the clients who received psychodynamic or those who received behavioral therapy
A
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