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The term illusion refers to a specific form of sensory distortion. Unlike a hallucination, which is a distortion in the absence of a stimulus, an illusion describes a misinterpretation of a true sensation. For example, hearing voices regardless of the environment would be a hallucination, whereas hearing voices in the sound of running water (or ...
A delusion [a] is a false fixed belief that is not amenable to change in light of conflicting evidence. [2] As a pathology, it is distinct from a belief based on false or incomplete information, confabulation, dogma, illusion, hallucination, or some other misleading effects of perception, as individuals with those beliefs are able to change or readjust their beliefs upon reviewing the evidence.
Optical illusion is also used in film by the technique of forced perspective. Op art is a style of art that uses optical illusions to create an impression of movement, or hidden images and patterns. Trompe-l'œil uses realistic imagery to create the optical illusion that depicted objects exist in three dimensions.
A hallucination is a perception in the absence of an external stimulus that has the compelling sense of reality. [6] They are distinguishable from several related phenomena, such as dreaming (), which does not involve wakefulness; pseudohallucination, which does not mimic real perception, and is accurately perceived as unreal; illusion, which involves distorted or misinterpreted real ...
Folie à deux (French for 'madness of two'), [1] also called shared psychosis [3] or shared delusional disorder (SDD), is a psychiatric syndrome in which symptoms of a delusional belief [4] are "transmitted" from one individual to another.
Fregoli delusion. The Fregoli delusion (or Fregoli syndrome) is a rare disorder in which a person holds a delusional belief that different people are in fact a single person who changes appearance or is in disguise. [1] The syndrome may be related to a brain lesion [2][3] and is often of a paranoid nature, with the delusional person believing ...
Aesthetic illusion is a type of mental absorption which describes a generally pleasurable cognitive state that is frequently triggered by various media or other artifacts. Recipients can be drawn into a represented world imaginatively, emotionally or, to some extent, rationally and experience the world, the characters and the story in a ...
False memory is an important part of psychological research because of the ties it has to a large number of mental disorders, such as PTSD. [56] False memory can be declared a syndrome when recall of a false or inaccurate memory takes great effect on a person's life.