The interaction between stop signal inhibition and distractor interference in the flanker and Stroop task

  • Verbruggen F
  • Liefooghe B
  • Vandierendonck A
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Abstract

In the present study, two experiments were conducted to investigate the interaction between the behavioral inhibition, measured by the stop signal task, and distractor interference, measured by the flanker task and the Stroop task. In the first experiment, the stop signal task was combined with a flanker task. Analysis revealed that participants responded faster when the distractors were congruent to the target. Also, the data suggest that it is more difficult to suppress a reaction when the distractors were incongruent. Whether the incongruent distractor was part of the response set (i.e. the distractor could also be a target) or not, had no influence on stopping reactions. In the second experiment, the stop signal task was combined with a manual version of the Stroop task and the degree of compatibility was varied. Even though in the second experiment of the present study interference control is differently operationalized, similar results as in the first experiment were found, indicating that inhibition of motor responses is influenced by the presentation of distracting information that is not part of the response set. © 2003 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Distractor interference
  • Flanker task
  • Response inhibition
  • Stop signal paradigm
  • Stroop task

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