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Talk:Hallucination

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However one may interpret the causality and reality, i.e. relevance of hallucinations, it seems to be clear that their occurrence strongly correlates with two extremes of sensory activation: either sensory flooding (sensory overload) or sensory deprivation. Both, of course, may be caused by external (as rave party or solitude) or internal factors (as drugs, brain injury, illness, or sleep deprivation).

Is there any evidence for this ? Seems a bit speculative to me. I think many of the hallucinatory sensory deprivation effects were found to be demand characteristics. - Vaughan 16:27, 13 Aug 2003 (UTC)

I've removed this paragraph as I've found no research to back it up. Objections and further evidence I may of missed welcome ! - Vaughan 17:42, 13 Aug 2003 (UTC)

Do my eyes deceive me ?? I belive the claim that taste and smell to be the most common forms of hallucination to be totally erroneous. Surely sight and sound are the most common forms of hallucination. Taste and smell sensory apparatus are not so easily deluded these are the rarest NOT commonest forms of hallucination. Think about what you are writing about! How often do your ears or eyes deceive you? If you believe the tongue and nose to be more frequent culprits of deception you are a very strange person indeed!!! The eye and ear are easily deceived, the tongue and nose being more primitive , less developed organs are far less prone to deception/malfunction. The poster has clearly never experienced an hallucination in their lives. The Norwikian 31 August

The claim that taste and smell are the commonest form of hallucinations are from the research referenced in this article (see reference 2). Sight and sound may be thought of as the commonest form of hallucination because these are the most prominent from hallucinogenic drugs. These are atypical forms of hallucination and as research has shown (refs 1 and 2) many people hallucinate outside the context of drug use and mental illness. BTW, hallucinations almost certainly arise from the brain rather than the sense organs themselves. - Vaughan 07:21, 1 Sep 2003 (UTC)

Well, what about the blindspot of the eye? Aren't we basically hallucinating the material where our blindspot is all the time? And auditory hallucinations are pretty common, actually, they're just not necessarily recognised as hallucinations because of their ambiguous nature. Words are very commonly hallucinated, both visually and auditorially... And when one really gets down to it, one realises that much of what we call 'reality' is just a hallucination in itself. We see what we expect to see, relate what we see to memories, and build upon these memories to form new and changing realities. In our base form, we don't even perceive the 'physical' world remotely the way we do when we have developed. As infants, we are incapable of relating objects around us to memories, as those memories don't exist, and thus our realities are very vague and indiscernable as infants. Infants aren't just 'stupid', their perception of the world in general is ultra-simplistic. Khranus

>I added a prominent reference to illusion in the first sentence, as most readers will not be familiar with the psychiatric meaning of the word. Misperception of stimulus can be just as indicative of mental illness as perception in the absence of stimulus. -Komodon- 24 Jan 2004

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