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Sensitivity to lexical denotation and connotation in brain-damaged patients: a double dissociation?
Brain and Language
|July 1, 1984
Summary
Brain damage affects word meaning processing. Left hemisphere damage impairs understanding literal meanings (denotation), while right hemisphere damage impairs understanding emotional associations (connotation).
Area of Science:
- Neuroscience
- Psycholinguistics
- Cognitive Psychology
Background:
- Word meaning comprises denotative (literal) and connotative (associative) aspects.
- Understanding how brain damage affects these distinct semantic processing facets is crucial.
Purpose of the Study:
- To investigate the dissociability of denotative and connotative word meaning processing.
- To determine the differential impact of unilateral left vs. right hemisphere brain damage on semantic tasks.
Main Methods:
- Patients with unilateral left or right hemisphere damage and healthy controls performed a word-triad grouping task.
- Participants were asked to identify the two most semantically similar words within each triad.
Main Results:
- Right hemisphere damaged patients showed preserved denotation but impaired connotation processing.
- Left hemisphere damaged patients demonstrated preserved connotation but impaired denotation processing.
- Control subjects flexibly utilized both denotative and connotative information.
Conclusions:
- Denotative and connotative aspects of word meaning are dissociable.
- Unilateral brain damage selectively impairs processing of either denotation or connotation, indicating hemispheric specialization for semantic features.