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Intact and impaired conceptual memory processes in amnesia

M M Keane1, J D Gabrieli, L A Monti

  • 1Department of Psychology, Wellesley College 02181, USA. mkeane@wellesley.edu

Neuropsychology
|January 1, 1997
PubMed
Summary

Amnesia patients show normal implicit memory (priming) but impaired explicit memory after incidental learning. However, both implicit and explicit memory were impaired after intentional learning, suggesting amnesia deficits don't affect all conceptual memory tasks.

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Area of Science:

  • Cognitive Neuroscience
  • Neuropsychology
  • Memory Research

Background:

  • Amnesia is characterized by memory impairments.
  • Conceptual memory involves processing information based on meaning.
  • Understanding amnesia's impact on conceptual memory is crucial.

Purpose of the Study:

  • To investigate conceptual memory processes in amnesia.
  • To differentiate implicit and explicit memory performance in amnesic patients.
  • To assess the influence of encoding depth and intentionality on memory.

Main Methods:

  • Administered a conceptual memory task to amnesic and control groups.
  • Used implicit (generate any exemplar) and explicit (generate studied exemplars) instructions.
  • Manipulated incidental deep/shallow and intentional encoding conditions.

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  • Assessed priming (implicit) and recall accuracy (explicit).

    • Main Results:

    • Amnesic patients exhibited normal implicit memory (priming) and levels-of-processing effects after incidental encoding.
    • Explicit memory performance was impaired in amnesic patients under incidental encoding.
    • Both implicit and explicit memory functions were impaired in amnesic patients after intentional encoding.

    Conclusions:

    • Amnesia does not universally impair all conceptual memory functions.
    • Implicit conceptual memory can be preserved in amnesia under certain conditions.
    • Encoding strategy (intentional vs. incidental) significantly impacts memory performance in amnesia.