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Related Experiment Video

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A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions
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Working Memory Content Is Distorted by Its Use in Perceptual Comparisons.

Keisuke Fukuda1,2, April E Pereira3, Joseph M Saito1

  • 1Department of Psychology, University of Toronto.

Psychological Science
|April 22, 2022
PubMed
Summary
This summary is machine-generated.

Comparing new visual input to working memory (WM) can distort memory. This study shows that similar inputs bias WM reports, driven by memory integration, not confusion.

Keywords:
individual differencesmemory distortionopen dataworking memory

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Perception

Background:

  • Dynamic environments require constant visual processing and comparison with working memory (WM).
  • The impact of comparing perceptual input with WM representations remains poorly understood.
  • Understanding WM dynamics is crucial for explaining cognitive performance in real-world scenarios.

Purpose of the Study:

  • To investigate how comparing new visual input with a working memory representation affects the WM representation itself.
  • To determine the mechanisms underlying memory distortions during perceptual comparison.
  • To identify factors influencing the interaction between working memory and incoming visual information.

Main Methods:

  • Three experiments involving young adults (N=170) comparing visual stimuli with WM representations.
  • Behavioral tasks measuring WM reports after perceptual comparison.
  • Computational modeling and individual-differences analyses to probe underlying mechanisms.

Main Results:

  • Perceptual comparison introduced bias into working memory reports.
  • This bias was more pronounced when the new input was subjectively similar to the WM representation.
  • Similarity-induced bias was attributed to representational integration, not confusion, between WM and perceptual input.

Conclusions:

  • Perceptual comparison represents a novel source of working memory distortion.
  • Representational integration explains how working memory interacts with and is altered by new visual information.
  • Findings offer insights into cognitive mechanisms governing memory updating and stability.