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Related Concept Videos

Schizophrenia01:17

Schizophrenia

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.
Negative and Cognitive Symptoms of Schizophrenia01:30

Negative and Cognitive Symptoms of Schizophrenia

Negative symptoms of schizophrenia indicate a reduction or absence of typical behaviors and emotional responses found in healthy individuals, while positive symptoms reflect an excess or distortion of normal functioning.
Negative Symptoms
Negative symptoms of schizophrenia manifest as deficits in normal emotional and behavioral functioning, profoundly impacting daily life. Individuals with schizophrenia often display a flat affect, characterized by a near-total absence of emotional expression,...
Psychological and Sociocultural Causes of Schizophrenia01:29

Psychological and Sociocultural Causes of Schizophrenia

Schizophrenia, a complex psychiatric disorder, has been historically misunderstood. Early psychological theories attributed its origins to childhood trauma and unresponsive parenting. However, contemporary research largely rejects these notions, favoring the vulnerability-stress hypothesis. This model proposes that individuals with a genetic predisposition to schizophrenia may develop the disorder following exposure to significant environmental stressors. Notably, studies on high-risk...
Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders

Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within the...
Positive Symptoms of Schizophrenia: Hallucinations and Delusions01:30

Positive Symptoms of Schizophrenia: Hallucinations and Delusions

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.
Thought Disorders
Disorganized and unusual thought processes mark thought disorders in schizophrenia. One key feature is disorganized speech, where an individual's conversation includes loosely...
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.
Hallucinations
Hallucinations in...

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Related Experiment Video

Updated: Jun 29, 2026

Development of a Virtual Reality Assessment of Everyday Living Skills
10:32

Development of a Virtual Reality Assessment of Everyday Living Skills

Published on: April 23, 2014

Deficit schizophrenia: an update.

Brian Kirkpatrick1, Silvana Galderisi

  • 1Department of Psychiatry and Health Behavior, Medical College of Georgia, 997 St. Sebastian Way, Augusta, GA 30912, USA.

World Psychiatry : Official Journal of the World Psychiatric Association (WPA)
|October 7, 2008
PubMed
Summary
This summary is machine-generated.

Deficit schizophrenia, characterized by persistent negative symptoms, is increasingly recognized as a distinct disease entity separate from non-deficit schizophrenia. New evidence supports this separation across multiple disease dimensions.

Keywords:
Deficit schizophreniaapathydouble dissociationheterogeneitynegative symptoms

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Published on: September 8, 2021

Area of Science:

  • Psychiatry
  • Neurology
  • Clinical Psychology

Background:

  • Deficit schizophrenia is defined by primary, enduring negative symptoms.
  • Previous literature suggested deficit schizophrenia as a distinct entity from non-deficit forms.
  • This review examines new evidence supporting the separation of these schizophrenia subtypes.

Purpose of the Study:

  • To review recent studies comparing deficit and non-deficit schizophrenia.
  • To evaluate evidence supporting deficit schizophrenia as a separate disease.
  • To highlight research and treatment challenges for deficit schizophrenia patients.

Main Methods:

  • Literature review of studies published after 2001.
  • Comparison of deficit and non-deficit schizophrenia on disease dimensions.
  • Analysis of findings related to symptoms, illness course, pathophysiology, etiology, and treatment response.

Main Results:

  • New evidence of double dissociation supports deficit schizophrenia as a separate disease.
  • Replicated findings across multiple dimensions strengthen the distinction.
  • Significant differences observed in signs, symptoms, illness course, and treatment response.

Conclusions:

  • Growing evidence supports deficit schizophrenia as a distinct disease.
  • Further research is needed to address treatment and care gaps.
  • Understanding these distinctions is crucial for targeted interventions.