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A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions
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Effects of proactive interference on non-verbal working memory.

Marilyn Cyr1, Derek E Nee2, Eric Nelson3

  • 1Division of Cognitive Neuroscience, New York State Psychiatric Institute, 1051 Riverside Dr, New York, NY, 10032, USA. cyrmari@nyspi.columbia.edu.

Cognitive Processing
|November 14, 2016
PubMed
Summary

Proactive interference (PI) affects visual working memory (WM), similar to verbal memory. Distinctive features like color and verbal labels enhance the ability to suppress irrelevant memories.

Keywords:
Directed forgettingInterference/inhibition in memory retrievalObject recognitionRecollectionWorking memory

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Memory Research

Background:

  • Working memory (WM) is crucial for cognition, involving active information maintenance and processing.
  • Resolving proactive interference (PI), the suppression of irrelevant prior memories, is vital for WM function.
  • Prior research on PI predominantly used verbal materials, leaving its domain-generality unclear.

Purpose of the Study:

  • To investigate the impact of PI on visual working memory.
  • To determine if PI effects are domain-general or specific to verbal information.
  • To explore how object nameability and perceptual features influence PI in visual WM.

Main Methods:

  • Utilized a Directed-Forgetting paradigm to assess visual WM.
  • Employed objects varying in nameability (high vs. low) and perceptual distinctiveness (color vs. gray).
  • Controlled for verbal labels to isolate PI effects in non-verbal stimuli.

Main Results:

  • Proactive interference effects were observed in visual WM with object stimuli, mirroring findings in verbal WM.
  • Even with low-nameability objects, PI effects persisted, suggesting a domain-general mechanism.
  • Increased object distinctiveness (color, verbal labels) improved performance in rejecting intrusion probes.

Conclusions:

  • Proactive interference impacts visual working memory, indicating a domain-general cognitive process.
  • Distinctive features enhance memory discriminability, aiding in the suppression of irrelevant information.
  • Findings contribute to understanding the mechanisms underlying proactive interference and working memory.