Imagery in schizophrenic patients compared with normal controls

Comparison of imagery was made between 20 hallucinating schizophrenics, 20 non-hallucinating schizophrenics and 20 normal controls using Bett's questionnaire on the vividness of mental imagery and Gordon's test of the control of visual imagery. Hallucinating schizophrenic patients did not differ from non-hallucinating schizophrenic or normal controls with regard to the vividness or control of imagery, indicating a lack of relationship between hallucinations and mental imagery. Although it indicates that there is no disturbance in the vividness of volitional mental imagery in schizophrenia, the presence of abnormal spontaneous imagery cannot be commented upon.