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Positive Symptoms Schizophrenia: Hallucinations and Delusions01:26

Positive Symptoms Schizophrenia: Hallucinations and Delusions

Schizophrenia is a complex psychiatric disorder characterized by a range of symptoms that significantly impact cognition, behavior, and emotional regulation. Among these, the positive symptoms stand out as they involve the addition or exaggeration of normal mental functions, deviating markedly from typical behavior and perception. Hallucinations and delusions are prominent positive symptoms, each profoundly affecting the individual's experience of reality.
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Schizophrenia, a term introduced by Swiss psychiatrist Eugen Bleuler in 1911, describes a severe psychological disorder marked by profound disruptions in attention, thought processes, language, emotion, and interpersonal relationships. The core feature of schizophrenia is psychosis — a state characterized by a fundamental detachment from reality. This disconnection manifests through distorted logic, impaired perception, and atypical behavior, severely affecting the lives of those diagnosed.
Positive Symptoms of Schizophrenia: Hallucinations and Delusions01:30

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Schizophrenia is a complex mental health disorder that can manifest with various positive symptoms, including thought, movement, and behavior disorders. These symptoms significantly disrupt cognitive and motor functions, leading to profound effects on an individual's ability to engage with the world.
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Related Experiment Video

Updated: May 10, 2026

Handwriting Analysis Indicates Spontaneous Dyskinesias in Neuroleptic Naïve Adolescents at High Risk for Psychosis
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Brief screening for psychosis-like experiences.

Carina Capra1, David J Kavanagh, Leanne Hides

  • 1Institute of Health & Biomedical Innovation and School of Psychology & Counselling, Queensland University of Technology, Qld 4059, Australia.

Schizophrenia Research
|July 9, 2013
PubMed
Summary

This study refined the Community Assessment of Psychic Experiences-Positive scale (CAPE-P) into a 15-item measure (CAPE-P15) for screening psychotic-like experiences in young adults. The CAPE-P15 demonstrates good internal consistency for identifying persecutory ideation, perceptual abnormalities, and bizarre experiences.

Keywords:
CAPECross-sectional analysisPsychotic-like experiencesScreening

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Area of Science:

  • Psychiatry
  • Psychological assessment
  • Mental health research

Background:

  • Psychotic-like experiences (PLEs) are prevalent and indicate potential mental health issues.
  • The Community Assessment of Psychic Experiences-Positive scale (CAPE-P) is a screening tool for PLEs.

Purpose of the Study:

  • To examine the internal structure of the CAPE-P in a young Australian sample.
  • To develop a refined measure for assessing positive, psychosis-like experiences.

Main Methods:

  • A cross-sectional online survey was administered to 1610 Australian university students (aged 18-25).
  • Confirmatory factor analyses were used to evaluate different models of the CAPE-P.
  • Item analysis was conducted to optimize the scale's structure.

Main Results:

  • A 3-factor model, termed the CAPE-P15, demonstrated the best fit after omitting specific items.
  • The CAPE-P15 comprises 15 items across three subscales: Persecutory Ideation, Perceptual Abnormalities, and Bizarre Experiences.
  • All subscales exhibited high internal consistency.

Conclusions:

  • The 15-item CAPE-P (CAPE-P15) shows potential as a reliable measure for positive, psychosis-like experiences in young adults.
  • Further validation in broader community samples is recommended to confirm its utility.