Cited by 110Decision-Making and Behavioral EconomicsNeural and Behavioral Psychology StudiesOptimism, Hope, and Well-being

Updating beliefs under perceived threat

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Garrett, Neil, González-Garzón, Ana María, Foulkes, Lucy, Levita, Liat, Sharot, Tali·2018·The Journal of Neuroscience

Abstract

Humans are better at integrating desirable information into their beliefs than undesirable information. This asymmetry poses an evolutionary puzzle, as it can lead to an underestimation of risk and thus failure to take precautionary action. Here, we suggest a mechanism that can speak to this conundrum. In particular, we show that the bias vanishes in response to perceived threat in the environment. We report that an improvement in participants9 tendency to incorporate bad news into their beliefs is associated with physiological arousal in response to threat indexed by galvanic skin response and self-reported anxiety. This pattern of results was observed in a controlled laboratory setting (Experiment I), where perceived threat was manipulated, and in firefighters on duty (Experiment II), where it naturally varied. Such flexibility in how individuals integrate information may enhance the likelihood of responding to warnings with caution in environments rife with threat, while maintaining a positivity bias otherwise, a strategy that can increase well-being. SIGNIFICANCE STATEMENT The human tendency to be overly optimistic has mystified scholars and lay people for decades: How could biased beliefs have been selected over unbiased beliefs? Scholars have suggested that although the optimism bias can lead to negative outcomes, including financial collapse and war, it can also facilitate health and productivity. Here, we demonstrate that a mechanism generating the optimism bias, namely asymmetric information integration, evaporates under threat. Such flexibility could result in enhanced caution in dangerous environments while supporting an optimism bias otherwise, potentially increasing well-being.

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Authors
Garrett, N., González-Garzón, A. M., Foulkes, L., Levita, L., & Sharot, T.
Affiliations
  • Princeton University (US)
  • University College London (GB)
  • University of Sheffield (GB)
Corresponding author
  • Garrett, Neil
  • Sharot, Tali
Venue
The Journal of Neuroscience
Published
2018-08-06
Volume
38
Issue
36
Pages
7901-7911
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2885599406
Cited by
109
References
58
Citations by year
2026: 14 · 2025: 16 · 2024: 13 · 2023: 14 · 2022: 17 · 2021: 12 · 2020: 17 · 2019: 6
FWCI
7.31
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Journal of Neuroscience (publishedVersion, cc-by)
  • SSRN Electronic Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
  • UEA Digital Repository (University of East Anglia) (submittedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
Wellcome Trust
Topics
  • Social Sciences › Decision Sciences › General Decision Sciences › Decision-Making and Behavioral Economics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Social Sciences › Psychology › Applied Psychology › Optimism, Hope, and Well-being
Keywords
optimism bias, positivity bias, threat perception, risk underestimation, skin conductance, physiological arousal, anxiety, firefighters, belief updating, precautionary behavior
MeSH terms
Optimism, Adult, Anxiety, Arousal, Female, Galvanic Skin Response, Humans, Male, Stress, Psychological, Young Adult

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