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  3. Irrelevant Task Difficulty Modulates The Emergence Of Task Conflict.
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  3. Irrelevant Task Difficulty Modulates The Emergence Of Task Conflict.

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Irrelevant Task Difficulty Modulates the Emergence of Task Conflict.

Ronen Hershman1, Eldad Keha2,3, Lisa Beckmann4

  • 1Department of Psychology, University of Innsbruck, Innsbruck, Austria.

Journal of Cognition
|January 12, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Cognitive control involves managing task-relevant information while ignoring irrelevant stimuli. This study shows that task conflict increases with the difficulty of ignoring irrelevant information, suggesting limited inhibitory control.

Keywords:
AutomaticityStroop effectcognitive controlnumerical cognitiontask conflict

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Information Processing

Background:

  • Cognitive control tasks require participants to focus on relevant stimuli and ignore irrelevant ones.
  • Task conflict, often studied using tasks like the Stroop task, arises from processing multiple stimulus dimensions.
  • Previous research inferred task conflict by comparing dual-task conditions with single-task conditions.

Purpose of the Study:

  • To investigate how the difficulty of the irrelevant stimulus dimension affects task conflict.
  • To determine if task conflict operates on a continuum.
  • To explore the limits of inhibitory control over involuntary processes.

Main Methods:

  • Utilized a color-digit Stroop task with varying difficulty levels for the irrelevant dimension.
  • Included a control experiment to specifically assess the difficulty of the irrelevant dimension.
  • Compared performance across congruent, incongruent, and neutral trials to infer conflict.

    • Main Results:

    • Information conflict was present across all experiments.
    • Task conflict increased as the difficulty of perceiving the irrelevant dimension increased.
    • The degree of task conflict scaled with the processing demands of the irrelevant task.

    Conclusions:

    • Task conflict is not an all-or-none phenomenon but exists on a continuum.
    • The findings suggest that inhibitory control is limited, as irrelevant processes remain active even when demanding resources.
    • This highlights the continuous engagement of involuntary processes despite cognitive control efforts.