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Related Experiment Videos

Implicit perception in patients with visual neglect: lexical specificity in repetition priming.

S R Schweinberger1, V Stief

  • 1University of Glasgow, Department of Psychology, 58 Hillhead Street, Glasgow G12 8QB, UK. s.schweinberger@psy.gla.ac.uk

Neuropsychologia
|February 13, 2001
PubMed
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Patients with left-sided neglect show subconscious word priming in their affected visual field, even without explicit awareness. This suggests non-conscious processing influences behavior in neglect patients.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Visual Perception

Background:

  • Left-sided neglect and hemianopia are conditions affecting visual processing.
  • Understanding non-conscious processing is crucial for neurological disorders.

Purpose of the Study:

  • To investigate priming effects in patients with left-sided neglect and hemianopia.
  • To determine if non-conscious stimuli influence lexical decisions in neglect.

Main Methods:

  • Lexical decision tasks were performed by patients with neglect, hemianopia, and controls.
  • Stimuli (words/pseudowords) were presented as primes in the left or right visual field.
  • Priming effects were measured by reaction times and accuracy.

Main Results:

Related Experiment Videos

  • Right visual field primes showed similar priming across all groups.
  • Left visual field primes did not prime hemianopic patients.
  • Neglect patients exhibited significant priming from neglected left visual field primes, exceeding control levels.
  • This priming occurred despite chance-level explicit recognition of the stimuli.

Conclusions:

  • Subliminal stimuli in the neglected visual field can influence lexical access in patients with neglect.
  • This demonstrates a dissociation between non-conscious priming and explicit perception in neglect.
  • Non-conscious processing plays a significant role in the manifestation of neglect symptoms.