Perceptual expansion

To answer the question, What was perceived we must consider both the possibility that the relevant stimuli were of internal origin and the possibility that the stimuli originated externally to the subject. In the discussion that follows, the assumption of internal stimuli and the possible explanations of suggestion, projection, dreaming, and hypnagogic state will be taken up first, followed by a consideration of the hypotheses of sensory translation and reality transfer. Then, assuming external stimuli, the hypothesis of perceptual expansion will be presented. 

Psychiatric Scale (IMPS) is used to measure psychotic syndromes in hospitalized adults capable of being interviewed. The 89 items are rated on the basis of a psychiatric interview. This test has been well validated and requires 10 to 15 minutes following a 35- to 45-minute interview. There are ten scores excitement, hostile belligerence, paranoid projection, grandiose expansiveness, perceptual distortions, anxious intropunitiveness, retardation and apathy, disorientation, motor disturbances, and conceptual disorganization. 

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