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Bihemispheric processing of redundant bilateral lexical information
1Department of Psychology, University of California, Riverside 92521, USA.
Neuropsychology
|February 14, 1998
Summary
This study explored how the brain processes ambiguous words. Findings suggest the left hemisphere is crucial for accessing less common meanings, while both hemispheres contribute to understanding common meanings.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Psycholinguistics
Background:
- Lexical ambiguity resolution is a complex cognitive process.
- Cerebral asymmetries may influence how different meanings of ambiguous words are accessed.
Purpose of the Study:
- To investigate the role of cerebral hemispheres in resolving lexical ambiguity.
- To examine how dominant and subordinate meanings are processed across visual fields.
Main Methods:
- Two experiments used lexical decision tasks with ambiguous word primes.
- Stimuli were presented to the left visual field/right hemisphere (LVF/RH) and right visual field/left hemisphere (RVF/LH).
- Bilateral visual field (BVF) presentation was used in Experiment 1.
Main Results:
- Dominant meaning priming occurred in both LVF/RH and RVF/LH.
- Subordinate meaning priming was observed exclusively in the RVF/LH.
- BVF presentation showed redundancy gain and priming similar to RVF/LH, suggesting hemispheric cooperation.
Conclusions:
- Hemispheric interaction plays a role in the availability of ambiguous word meanings.
- The left hemisphere appears specialized for accessing subordinate meanings.
- Bihemispheric processing of lexical information involves cooperation between hemispheres.