[[3]] Hans J. Eysenck, "The Battle over Therapeutic Effectiveness," in J. Hariman, ed., Does Psychotherapy Really Help People?, p. 59.
... [M]ost of the verbal psychotherapies have an effect size that is only marginally greater than the effect size for ... a "placebo treatment."[[4]]
[[4]] Edward Erwin, "Is Psychotherapy More Effective Than a Placebo?," in Does Psychotherapy Really Help People?, p. 39.
Most writers ... agree that the therapeutic claims made for psychotherapy range from the abysmally low to the astonishingly high and, furthermore, they would tend to agree that on the average psychotherapy appears to produce approximately the same amount of improvement as can be observed in patients who have not received this type of treatment.[[5]]
[[5]] Rachman, The Effects of Psychotherapy, p. 84.
... [U]sing placebo treatment as a proper control (which it undoubtedly is), we find that the alleged effectiveness of psychodynamic therapy [i.e., psychoanalysis] vanishes almost completely.[[6]]
[[6]] Eysenck, "The Battle over Therapeutic Effectiveness," p. 56.
There is still no acceptable evidence to support the view that psychoanalytic treatment is effective.[[7]]
[[7]] Rachman, The Effects of Psychotherapy, p. 63.
... [T]here is no relationship between duration of therapy and effectiveness of therapy.[[8]]