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The effects of perceptual interference at encoding on implicit memory, explicit memory, and memory for source

N W Mulligan1

  • 1Department of Psychology, Illinois State University, Normal 61790-4620, USA. nwmulli@rs6000.cmp.ilstu.edu

Journal of Experimental Psychology. Learning, Memory, and Cognition
|September 1, 1996
PubMed
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Disrupting stimulus identification surprisingly improves explicit memory, like recalling categories. This effect specifically benefits conceptual memory tests, not implicit ones, suggesting deeper processing.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Memory Research

Background:

  • Explicit memory performance is typically assumed to benefit from clear, unimpeded stimulus identification.
  • Counterintuitive findings suggest that interference during initial processing may enhance later memory recall.

Purpose of the Study:

  • To investigate the phenomenon where interfering with stimulus identification enhances explicit memory.
  • To differentiate the effects of perceptual interference on explicit versus implicit memory tests.

Main Methods:

  • Conducted 5 experiments manipulating perceptual interference during stimulus identification.
  • Utilized various memory tests including category-cued recall, category-exemplar production, old-new recognition, rhyme recognition, and source discriminability.

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Main Results:

  • Perceptual interference significantly enhanced category-cued recall (explicit, conceptual test).
  • No effect of perceptual interference was observed on category-exemplar production (implicit test).
  • Recognition memory was enhanced, but data-driven explicit tests like rhyme recognition and source memory were not.

Conclusions:

  • The findings challenge traditional views of memory encoding, indicating interference can be beneficial for certain types of explicit memory.
  • Explanations involving enhanced semantic elaboration or spatio-temporal context are insufficient.
  • Compensatory processing of higher-level perceptual representations, within the transfer-appropriate processing framework, offers a viable explanation.