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Related Experiment Videos

Conceptual implicit memory performance in Alzheimer's disease.

M M Lazzara1, A P Yonelinas, B A Ober

  • 1Department of Psychology, University of California, Davis, USA. michele@eeg.com

Neuropsychology
|January 5, 2002
PubMed
Summary

Alzheimer's disease patients show conceptual memory deficits, even when word production is not required. These findings suggest broader cognitive impairments beyond language difficulties in Alzheimer's disease.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Alzheimer's disease (AD) is associated with impaired conceptual implicit memory.
  • Existing tests for conceptual memory often involve word production, which is also affected in AD.

Purpose of the Study:

  • To assess conceptual implicit memory in AD patients using a task independent of word production.
  • To compare performance on semantic decision, category exemplar generation, and recognition memory tasks in AD patients and controls.

Main Methods:

  • Utilized a semantic decision task (conceptual priming without word production).
  • Included a category exemplar generation task (conceptual priming with word production).
  • Administered a recognition memory test for comparison.

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Main Results:

  • AD patients demonstrated deficits across all tested memory domains: semantic decision, category exemplar generation, and recognition memory.
  • Impaired performance was observed even on the conceptual task not requiring word output.

Conclusions:

  • Conceptual memory deficits in Alzheimer's disease are not solely due to word production impairments.
  • AD affects broader conceptual memory functions, independent of language output abilities.