From Smith, Glass & Miller (1980)
 

                  Fear/    Self-    Addiction    Social    Achievement
                 Anxiety  esteem                behaviour
 
 

Psychodynamic      .78     .66        1.05        .94          1.24
 

Humanistic         .61     .99                    .45           .54

Cognitive         1.67     .65         .53                      .28

Cognitive-
Behavioural       1.78     .73                    1.23          .60
 

Behavioural       1.12     .23          .75        .42          .45
 

Note: this is standard effect size.  Zero means average person in treatment equals average person in control group.  1.0 means 84% in treatment improved more than average person in control group.