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Related Experiment Videos

Stimulus- and response-conflict-induced cognitive control in the flanker task.

Frederick Verbruggen1, Wim Notebaert, Baptist Liefooghe

  • 1Ghent University, Ghent, Belgium. frederick.verbruggen@ugent.be

Psychonomic Bulletin & Review
|August 9, 2006
PubMed
Summary

Conflict adaptation occurs after both stimulus and response conflicts. The stimulus congruency effect lessens following incongruent trials, but response congruency effects remain unchanged, differentiating conflict detection and regulation.

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Area of Science:

  • Cognitive psychology
  • Neuroscience
  • Human experimental psychology

Background:

  • Conflict monitoring and adaptation are crucial for cognitive control.
  • Previous research focused on general conflict, but distinctions between conflict types are less understood.
  • Understanding how different conflict types influence cognitive adjustments is essential.

Purpose of the Study:

  • To investigate conflict monitoring by differentiating between stimulus-stimulus conflict and stimulus-response conflict.
  • To examine the effects of previous trial congruency on current trial conflict adaptation.
  • To explore the relationship between conflict detection and conflict regulation mechanisms.

Main Methods:

  • A modified flanker task was employed, distinguishing between stimulus-stimulus and stimulus-response conflict.

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  • Stimulus-response mappings were designed to exclude feature repetitions from trial n-1 to trial n.
  • Analysis focused on the congruency effects of the previous trial on the current trial.

    • Main Results:

    • Conflict adaptation was observed, indicated by a reduced stimulus congruency effect after both stimulus-incongruent and response-incongruent trials.
    • The response congruency effect did not significantly change based on the congruency of the preceding trial.
    • These findings suggest differential adaptation mechanisms for stimulus-based versus response-based conflict.

    Conclusions:

    • The study highlights distinct patterns of conflict adaptation for stimulus-stimulus versus stimulus-response conflict.
    • Results support a differentiation between conflict detection and conflict regulation processes.
    • Further research is needed to fully elucidate the neural and cognitive underpinnings of these distinct conflict types.