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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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A measure of the interference effect distribution.

Thibault Gajdos1, Mathieu Servant2, Thierry Hasbroucq3

  • 1Aix Marseille University CNRS, LNC, Marseille, France. thibault.gajdos@univ-amu.fr.

Behavior Research Methods
|May 29, 2020
PubMed
Summary

We developed a new Interference Distribution Index to measure how response times relate to interference effects. This index offers a sensitive and unique way to analyze interference patterns in cognitive data.

Keywords:
Conflict tasksDelta plotsInterference effectMental chronometry

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Area of Science:

  • Cognitive Psychology
  • Psychometrics

Background:

  • Quantifying interference effects in cognitive tasks is crucial for understanding cognitive processes.
  • Existing methods may lack sensitivity or intuitive interpretation for interference distribution.

Purpose of the Study:

  • To introduce and validate a novel index, the Interference Distribution Index (IDI), for quantifying the relationship between response times and interference effect size.
  • To demonstrate the IDI's unique properties and practical utility in analyzing cognitive interference.

Main Methods:

  • Elaboration of the Interference Distribution Index (IDI).
  • Association of the IDI with a graphical representation: the Lorenz-interference plot.
  • Demonstration of IDI's sensitivity to changes in interference distribution and data aggregation.
  • Mathematical proof of the IDI's uniqueness (up to monotonic transformation) for specific properties.

Main Results:

  • The IDI effectively quantifies the link between response times and interference.
  • The IDI exhibits superior sensitivity to distributional changes and data aggregation compared to other potential indices.
  • Simulations of a cognitive interference model and reanalysis of experimental data support the IDI's relevance and applicability.

Conclusions:

  • The Interference Distribution Index provides a robust and interpretable measure for cognitive interference.
  • The IDI and its graphical representation offer valuable tools for researchers studying cognitive processes and response time data.
  • This index represents a significant advancement in the quantitative analysis of interference effects.