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Related Experiment Videos

Word fluency after a right-hemisphere lesion

P Goulet1, Y Joanette, L Sabourin

  • 1Institut universitaire de gériatrie de Montréal, Centre hospitalier Côte-des-Neiges, Montréal, Québec, Canada. gouletp@ere.umontreal.ca

Neuropsychologia
|February 14, 1998
PubMed
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Right-hemisphere stroke patients did not show impaired semantic processing in a word fluency task. This challenges previous findings suggesting the right hemisphere is crucial for semantic word tasks in right-handers.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurolinguistics

Background:

  • Previous research suggested right-hemisphere stroke impairs semantic but not orthographic word processing in right-handed individuals.
  • This dissociation was interpreted as the right hemisphere's specific role in semantic aspects of word processing.

Purpose of the Study:

  • To challenge the previously reported semantic-orthographic dissociation in word fluency tasks.
  • To investigate the role of the right hemisphere in semantic processing under controlled conditions.

Main Methods:

  • A word fluency task was administered to patients with right-hemisphere stroke.
  • Production criteria were randomized, and productivity levels were controlled.

Main Results:

Related Experiment Videos

  • The semantic-orthographic dissociation previously reported was not replicated.
  • Right-hemisphere stroke patients did not exhibit impaired semantic processing compared to orthographic processing.

Conclusions:

  • The findings do not support the hypothesis that the right hemisphere uniquely contributes to semantic processing in right-handers.
  • Methodological factors, such as controlled productivity and random criteria presentation, may influence the observed dissociation.