Published online by Cambridge University Press: 29 January 2018
A cogent interpretation of the apparent average ineffectiveness of psychotherapy (e.g. Eysenck, 1960) has been proposed by Bergin (1966) and taken up by Truax and Carkhuff (1967). This explanation is based upon the suggestion that some therapeutic encounters harm patients and hence beneficial effects are cancelled out when the average results of large groups are considered. Rather than beginning with large miscellaneous samples treated in an unspecified variety of ways, our research programme involves detailed experimental and correlational studies of the therapy of a small number of patients with similar diagnoses. This paper is limited to a preliminary study of assessment of change in psychotherapy by means of the Personal Questionnaire (PQ,), (Shapiro, 1961, 1969).
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