Perceptual organization, the disorganization syndrome, and context processing in chronic schizophrenia

@article{Silverstein2000PerceptualOT,
  title={Perceptual organization, the disorganization syndrome, and context processing in chronic schizophrenia},
  author={Steven M. Silverstein and Ilona Kov{\'a}cs and Rodney Corry and Carolyn Valone},
  journal={Schizophrenia Research},
  year={2000},
  volume={43},
  pages={11-20}
}

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...

References

SHOWING 1-10 OF 43 REFERENCES

Stimulus configuration and context effects in perceptual organization in schizophrenia.

The perceptual organization deficit is most pronounced in actively symptomatic patients with poor premorbid schizophrenia, and the deficit reflects, in part, deficient top-down influences to basic perceptual processes.

Perceptual Organisation in Schizophrenia: Evidence of Intact Processing of Configural Stimuli

Assessment of the ability to process configural stimuli made up of noncontiguous elements using Kahneman and Neisser's Visual Suffix Task provides further evidence that schizophrenia patients can perceptually organiseconfigural stimuli, and that their perceptual organisation difficulties are limited to organising nonconfigural sets of stimuli into perceptual wholes.

Reduced top-down influence in auditory perceptual organization in schizophrenia.

Data suggest that a reduced ability to utilize contextual information plays a role in the perceptual organization dysfunction in schizophrenia.

Perceptual Organisation of Configural and Visual Patterns in Schizophrenia: Effects of Repeated Exposure

It is suggested that schizophrenia is characterised by a reduced ability to initiate experience-based changes in the visual system, wherein a group of noncontiguous elements that recur together and that are behaviourally relevant begins to be processed as a single unit.

Perceptual organization in schizophrenia: utilization of the Gestalt principles.

The hypothesis that visual perceptual organization, in terms of utilizing the Gestalt principles, is relatively intact in people with schizophrenia is supported.

Context-processing deficits in schizophrenia: converging evidence from three theoretically motivated cognitive tasks.

The results suggest an accentuation of deficits in patients with schizophrenia in context-sensitive conditions and cross-task correlations of performance in these conditions, but the results do not definitively eliminate the possibility of a generalized deficit.

Schizophrenia: An Information Processing Model

  • Vaughan CarrJ. Wale
  • Psychology, Medicine
    The Australian and New Zealand journal of psychiatry
  • 1986
This paper draws together knowledge from experimental cognitive psychology and examines how both research findings and the clinical manifestations of schizophrenia can be accommodated by an information processing paradigm.

Context, cortex, and dopamine: a connectionist approach to behavior and biology in schizophrenia.

A disturbance in the internal representation of contextual information can provide a common explanation for schizophrenic deficits in several attention- and language-related tasks and shows that these behavioral deficits may arise from a disturbance in a model parameter corresponding to the neuromodulatory effects of dopamine.

Thought disorder in schizophrenia: cognitive and neuroscience approaches.

A hypothesis of an early (pre-100 ms) information-processing deficit is posited and further refined by results presented from brain evoked potentials during a backward-masking experiment.

Nonverbal perceptual organization output disability and schizophrenia spectrum symptomatology.

It is suggested that direct comparisons between these groups can aid in clarifying the specific nature of cognitive deficit-symptom relationships, as well as leading to improvements in the understanding, diagnosis and treatment of schizophrenic and neurodevelopmental syndromes.