Prepared phobias and obsessions: Therapeutic outcome

Sixty-nine phobic and eighty-two obsessional patients, treated at the Maudsley Hospital, were rated for ‘preparedness’, the evolutionary significance of the content and behaviour of the disorder. Reliable ratings (r = 0.78 and 0.90) of the dangerousness of the object or situation to pretechnological man indicated that the content of the large majority of the phobias and obsessions are judged as evolutionarily significant. Degree of preparedness, however, did not predict outcome of therapy, suddenness of onset of the disorder, severity of impairment, intensiveness of the treatment received, or age of onset. Nor was there any significant relationship between preparedness and certain other variables in the obsessional sample: stimulus generalization, effect on life style, impaired reproductive capacity and abnormal personality. The implications of these findings for the hypothesis that human phobias and obsessions are prepared, and for the clinical usefulness of the concept of preparedness, are discussed.