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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...
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The term "psychosis" refers to a spectrum of mental disorders characterized by abnormal thoughts, perceptions, and behaviors. It can manifest as mood disorders, dementia, delirium with psychotic features, substance-induced psychosis with psychotic features, brief psychotic disorder, delusional disorder, schizoaffective disorder, and schizophrenia. Among all these disorders, schizophrenia is the most common psychotic disorder, affecting 1% of the worldwide population. Psychotic...
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Cognitive Dysfunction as a Risk Factor for Psychosis.

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Cognitive deficits are a significant risk factor for psychosis development, appearing early and worsening with symptom severity. These impairments, particularly in language and memory, are key to understanding psychosis risk.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Cognition is increasingly recognized as a critical factor in psychosis development.
  • Cognitive impairments are observed across the spectrum of psychosis risk symptoms.
  • These deficits may serve as intermediate risk factors linking genetic/neural factors to psychosis.

Purpose of the Study:

  • To summarize current evidence on cognition as a psychosis risk factor.
  • To explore theories linking cognitive deficits to psychotic symptoms.
  • To identify cognitive domains most consistently affected in psychosis.

Main Methods:

  • Review of recent evidence and research findings.
  • Examination of theoretical frameworks connecting cognition and psychosis.
  • Analysis of cognitive performance across the psychosis spectrum.

Main Results:

  • Cognitive deficits precede psychosis onset and are detectable early, even in childhood.
  • Impairments in language, cognitive control, and working memory are consistently associated with psychosis.
  • The severity of cognitive deficits generally correlates with the severity of psychotic symptoms.

Conclusions:

  • Cognitive deficits are a significant risk factor for psychosis, preceding symptom development.
  • While not unique to psychosis, cognitive impairments are most severe in psychotic disorders.
  • Further research is needed to clarify mechanisms, timing, and specific predictive cognitive markers for psychosis risk.