The Psychotomimetic States Inventory (PSI): Measuring psychotic-type experiences from ketamine and cannabis

@article{Mason2008ThePS,
  title={The Psychotomimetic States Inventory (PSI): Measuring psychotic-type experiences from ketamine and cannabis},
  author={Oliver Mason and Celia J. A. Morgan and Anja N D Stefanovic and H Valerie Curran},
  journal={Schizophrenia Research},
  year={2008},
  volume={103},
  pages={138-142}
}
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103 Citations
Highly Influential Citations
11
Background Citations
19
Methods Citations
23
Results Citations
5

103 Citations

Citation Type

Citation Type

The Psychotomimetic Nature of Dreams: An Experimental Study
TLDR
Overall, participants reported more quasipsychotic characteristics during dreams (in both conditions) than when awake, and subjective changes to cognition and affect are consistent with alterations in prefrontal cortical activity during REM sleep that mirror those of schizophrenia.
Acute cannabis use causes increased psychotomimetic experiences in individuals prone to psychosis
TLDR
It is suggested that an individual's response to acute cannabis and their psychosis-proneness scores are related and both may be markers of vulnerability to the harmful effects of this drug.
Pharmacological modelling of dissociation and psychosis: an evaluation of the Clinician Administered Dissociative States Scale and Psychotomimetic States Inventory during nitrous oxide ('laughing gas')-induced anomalous states.
TLDR
The CADSS and PSI tap largely non-overlapping experiences under N2O and it is proposed the use of both measures to comprehensively assess anomalous subjective states produced by dissociative NMDAR antagonists.
Inducing Psychotic-like Experiences without Drugs using the Witches’ Cradle
Various means of inducing unusual or anomalous experiences sharing similarities with psychosis have been proposed. In the present study, an ‘altered states of consciousness induction device’ (ASCID)…
Psychotomimetic and Cognitive Effects of Cannabis Use in the General Population
The paradoxical psychological effects of lysergic acid diethylamide (LSD)
TLDR
The present findings reinforce the view that psychedelics elicit psychosis-like symptoms acutely yet improve psychological wellbeing in the mid to long term, and are proposed that acute alterations in mood are secondary to a more fundamental modulation in the quality of cognition.
Cannabis and Hallucinations: Studies in Human Subjects
TLDR
This chapter examines the relationship between cannabis, psychosis and hallucinations, and describes the small number of studies that have directly examined the effects of cannabis and Δ-9-THC on sensory cortices.
The Psychotomimetic Effects of Short-Term Sensory Deprivation
  • O. Mason, F. Brady
  • Psychology, Medicine
    The Journal of nervous and mental disease
  • 2009
TLDR
This study explored whether perceptual disturbances could be elicited by a brief period of complete isolation from sound and vision in both highly hallucination prone and nonhallucination prone groups.
Acute effects of cannabis on speech illusions and psychotic-like symptoms: two studies testing the moderating effects of cannabidiol and adolescence
TLDR
Inhalation of cannabis reliably increases psychotic-like symptoms in healthy cannabis users and may increase the incidence of speech illusion, and adolescents may be less vulnerable to acute psychotic- like effects of cannabis than adults.
Impaired facial emotion recognition in a ketamine model of psychosis
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