Abstract
Disordered associative processes have long been regarded as central to the psychological description of psychotic states such as acute schizophrenia. Previous work is briefly summarised concerning the idea that hyperactive associative processes of thought underlie many of the symptoms of psychosis. The idea is developed further, with respect to several features of the psychotic state. Schneiderian symptoms are seenas a consequence of hyperactive associations of thought, combined with perceptual hypersensitivity characteristic of many psychotic individuals. Anxiety in psychotic states is seen as arising from the great ambiguity of mental images when associations are loosened. A vicious circle between high anxiety and hyperactive associations is postulated. The slow and variable response to neuroleptic treatment is seen as being determined in part by the dynamics of change of the memories acquired during a period of hyperactive associations.
This essay has dealt exclusively with the positive (productive) symptoms of psychosis, and their treatment. It has briefly traced the origin of the idea that hyperactive associations of thought (i.e. of inductive inference) play an important part in the psychology of acute psychosis. Further it has attempted to show that this idea can be extended to give an account of Schneiderian symptoms, the high anxiety levels commonly found in acute psychosis, as well as the great variability in the rate and extent of response to drug treatment. The negative symptoms of schizophrenia are not included in the discussion. Some of these symptoms are not responsive to neuroleptic drugs. This leads one to suspect that other pathological processes in addition to those discussed above may be involved in the genesis of the negative symptoms.