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Related Experiment Videos

Naming without knowing and appearance without associations: evidence for constructive processes in semantic memory?

K R Laws1, J J Evans, J R Hodges

  • 1Department of Experimental Psychology, University of Cambridge, UK.

Memory (Hove, England)
|September 1, 1995
PubMed
Summary

Herpes Simplex Encephalitis caused temporal lobe injury in patient SE, impairing associative animal knowledge but preserving sensory attributes and object recognition. This suggests sensory knowledge alone may suffice for naming animals.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurolinguistics

Background:

  • Herpes Simplex Encephalitis (HSE) can cause temporal lobe injury.
  • Semantic memory disorders impact knowledge of object attributes.
  • Previous research has not detailed dissociations between sensory and associative knowledge.

Observation:

  • Patient SE, with HSE-induced temporal lobe injury, showed disproportionate impairment in associative/functional animal knowledge.
  • SE's knowledge of sensory attributes (visual, auditory) of animals was relatively preserved.
  • Knowledge of man-made objects remained intact, contrasting with animal knowledge deficits.

Findings:

  • SE could name animals from pictures despite errors in generating associative information.
  • This suggests sensory semantic knowledge may be sufficient for object naming.

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  • Errors were confabulatory and reconstructive, challenging passive memory models.

    • Implications:

    • Semantic memory may involve dynamic, constructive, and inferential processes, not just stored representations.
    • Disorders affecting semantic memory can be category-specific.
    • Understanding these dissociations aids in diagnosing and treating cognitive impairments post-encephalitis.