Feeling we’re biased: Autonomic arousal and reasoning conflict

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Abstract

Human reasoning is often biased by intuitive beliefs. A key question is whether the bias results from a failure to detect that the intuitions conflict with logical considerations or from a failure to discard these tempting intuitions. The present study addressed this unresolved debate by focusing on conflict-related autonomic nervous system modulation during biased reasoning. Participants’ skin conductance responses (SCRs) were monitored while they solved classic syllogisms in which a cued intuitive response could be inconsistent or consistent with the logical correct response. Results indicated that all reasoners showed increased SCRs when solving the inconsistent conflict problems. Experiment 2 validated that this autonomic arousal boost was absent when people were not engaged in an active reasoning task. The presence of a clear autonomic conflict response during reasoning lends credence to the idea that reasoners have a “gut” feeling that signals that their intuitive response is not logically warranted. Supplemental materials for this article may be downloaded from http://cabn.psychonomic-journals.org/content/supplemental.

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Copyright information

© Psychonomic Society, Inc. 2010

Authors and Affiliations

  • Wim De Neys
    • 1
  • Elke Moyens
    • 2
  • Debora Vansteenwegen
    • 2
  1. 1.CNRS and University of ToulouseToulouseFrance
  2. 2.University of LeuvenLeuvenBelgium

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