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  2. Pseudohallucination - Wikipedia

    en.wikipedia.org/wiki/Pseudohallucination

    A pseudohallucination (from Ancient Greek: ψευδής (pseudḗs) ' false, lying ' + hallucination) is an involuntary sensory experience vivid enough to be regarded as a hallucination, but which is recognised by the person experiencing it as being subjective and unreal. By contrast, a "true" hallucination is perceived as entirely real by the ...

  3. Rosenhan experiment - Wikipedia

    en.wikipedia.org/wiki/Rosenhan_experiment

    The experts correctly diagnosed two of the ten patients, misdiagnosed one patient, and incorrectly identified two healthy patients as having mental health problems. Unlike the other experiments listed here, however, the purpose of this journalistic exercise was not to criticize the diagnostic process, but to minimize the stigmatization of the ...

  4. Hallucinogen persisting perception disorder - Wikipedia

    en.wikipedia.org/wiki/Hallucinogen_persisting...

    Hallucinogen persisting perception disorder (HPPD) is a non-psychotic disorder in which a person experiences apparent lasting or persistent visual hallucinations or perceptual distortions after using drugs, [1] including but not limited to psychedelics, dissociatives, entactogens, tetrahydrocannabinol (THC), and SSRIs.

  5. Hallucination - Wikipedia

    en.wikipedia.org/wiki/Hallucination

    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 ...

  6. Oneiroid syndrome - Wikipedia

    en.wikipedia.org/wiki/Oneiroid_syndrome

    A patient with oneiroid syndrome will often experience unusual and colourful pseudohallucinations. [1] The environment may be perceived as having been specially set as for a show. [1] Some patients in an oneiroid state might believe that during such an experience their lives are staged shows; in this case it is similar to the Truman Show delusion.

  7. David Rosenhan - Wikipedia

    en.wikipedia.org/wiki/David_Rosenhan

    Rosenhan believed that there are seven main features of psychological abnormality: suffering; maladaptiveness; vividness and unconventionality; unpredictability and loss of control; irrationality and incomprehensibility; observer discomfort; and violation of moral and ideal standards.

  8. Stimulant psychosis - Wikipedia

    en.wikipedia.org/wiki/Stimulant_psychosis

    Stimulant psychosis is a mental disorder characterized by psychotic symptoms (such as hallucinations, paranoid ideation, delusions, disorganized thinking, grossly disorganized behaviour). It involves and typically occurs following an overdose or several day binge on psychostimulants , [ 1 ] although it can occur in the course of stimulant ...

  9. Altered state of consciousness - Wikipedia

    en.wikipedia.org/wiki/Altered_state_of_consciousness

    During the seizure, the patient will experience hallucinations and loss of mental control, [38] causing temporary dissociation from reality. A study that was conducted with six epileptic patients and used functional magnetic resonance imaging (fMRI) detected how the patients did indeed experience hallucinations while a seizure is occurring. [39]