perceptual disturbance
   Also known as disorder of perception. Both these umbrella terms are used to denote an aberrant perceptual phenomenon occurring to the waking mind. In Fish's Clinical Psychopathology, the group of perceptual disturbances is divided into * sensory deceptions (comprising hallucinations and * illusions) and * sensory distortions (involving changes in the intensity, quality, or spatial form of sense perceptions).
   References
   Fish, F. (1985). Fish's clinical psychopathol-ogy. Second edition. Edited by Hamilton, M. Bristol: John Wright.
   Guy, W., Ban, T.A., eds. (1982). The AMDP-system: Manual for the assessment and documentation of Psychopathology. Berlin: Springer.

Dictionary of Hallucinations. . 2010.

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