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Related Experiment Video

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Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

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Published on: April 16, 2014

Perceptual training strongly improves visual motion perception in schizophrenia.

Daniel J Norton¹, Ryan K McBain, Dost Ongür

¹McLean Hospital, Massachusetts, United States. djn@bu.edu

Brain and Cognition

|August 30, 2011

Summary

Schizophrenia patients showed significant improvements in visual motion discrimination after perceptual learning, with greater gains than healthy controls. This suggests robust perceptual plasticity in schizophrenia for potential cognitive interventions.

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Area of Science:

Neuroscience
Psychology
Psychiatry

Background:

Schizophrenia is characterized by perceptual and cognitive deficits, impacting visual motion processing.
Cognitive functions rely on perceptual inputs, suggesting perceptual enhancement as a potential intervention strategy.
Perceptual learning improves motion perception in healthy individuals, but its efficacy in schizophrenia is unknown.

Purpose of the Study:

To investigate the potential for perceptual learning to enhance visual motion discrimination in schizophrenia patients.
To determine if perceptual plasticity is preserved in schizophrenia.

Main Methods:

A perceptual learning procedure was employed to train participants on visual motion discrimination.
Schizophrenia patients and healthy controls completed the training task.
Performance was measured by direction discrimination thresholds.

Main Results:

Both schizophrenia patients and healthy controls demonstrated improved performance (decreased thresholds) with training.
Schizophrenia patients showed a significantly larger improvement (47%) compared to healthy controls (21%).
Both groups exhibited moderate, non-significant improvements on an untrained speed discrimination task.

Conclusions:

Perceptual plasticity is robust in schizophrenia patients.
Perceptual learning can effectively improve visual motion discrimination in schizophrenia.
These findings support the development of bottom-up behavioral interventions for schizophrenia.