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The functional locus of intrusions: encoding or retrieval?

Gianfranco Dalla Barba1, Maria Cristina Mantovan, Latchezar Traykov

  • 1U. 324 INSERM, Paris, France. dallabarba@broca.inserm.fr

Journal of Clinical and Experimental Neuropsychology
|August 21, 2002
PubMed
Summary

Encoding interference, not retrieval interference, increases memory intrusions in healthy individuals. This suggests that how information is initially learned, rather than how it

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Memory Research

Background:

  • Current theories on memory intrusions often focus on retrieval or post-retrieval deficits.
  • Confabulatory phenomena and memory intrusions are complex cognitive processes.
  • Understanding the origins of intrusions is crucial for memory disorder research.

Purpose of the Study:

  • To investigate whether interfering tasks during encoding or retrieval elicit more memory intrusions.
  • To compare the effects of interference at encoding versus retrieval on recall accuracy and intrusions.
  • To determine the relative roles of encoding and retrieval processes in intrusion generation.

Main Methods:

  • Experiment 1: Compared story recall with and without an interfering task during retrieval.

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  • Experiment 2: Compared story recall with interference at encoding versus interference at both encoding and retrieval.
  • Utilized normal subjects to examine memory performance under different interference conditions.

    • Main Results:

    • Interference during retrieval did not affect recall accuracy or the frequency of intrusions.
    • Interference at encoding, compared to dual interference, showed no significant difference in recall accuracy or intrusions.
    • Cross-experiment analysis indicated that encoding interference impacts both retrieval accuracy and intrusion probability.

    Conclusions:

    • Encoding processes play a more significant role in eliciting memory intrusions than retrieval processes.
    • The findings challenge retrieval-deficit-centric accounts of confabulatory phenomena.
    • Interference during the initial learning phase is a key factor in the occurrence of memory intrusions.