GRE (Graduate Record Examinations) Psychology Clinical and Abnormal Psychology-Causes and Development of Disorders Study Material (Page 17 of 29)

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Hallucination: Difference between Hallucinations and Other Terms and Stages of Hallucination


A hallucination is a perception in the absence of a stimulus. In a stricter sense, hallucinations are defined as perceptions in a conscious and awake state in the absence of external stimuli, which have qualities of real perception, in that they are substantial, and located in external objective space.

Difference between Hallucinations a

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Hallucination: Etiology of Hallucination


Etiology of Hallucination

Hallucinations can be caused by and classified into a number of factors.

  • Hypnagogic Hallucination: Hallucinations that occur just before falling asleep, insight is preserved
  • Peduncular Hallucinosis: These usually occur in the evenings, but not during drowsiness, as in the case of hypnagogic hallucination. The subject is fully conscious and able to interac

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