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Brain Structure and Optimism Bias: A Voxel-Based Morphometry Approach.

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  • 1Institute for Psychology, University of Bern, Fabrikstrasse 8, 3012 Bern, Switzerland.

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Summary
This summary is machine-generated.

Our brains show distinct gray matter patterns for personal and social optimism bias. This suggests that while optimism is biologically rooted, the mechanisms behind personal and social biases differ.

Keywords:
behaviorfrontal polegray-matter volumeoptimism biaspositive psychologyputamentemporal polevoxel-based morphometry

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neuroimaging

Background:

  • Individuals exhibit optimism bias, unrealistically favoring positive future outcomes for themselves (personal) and others (social).
  • The neuroanatomical underpinnings of these distinct optimism biases remain largely unexplored.

Purpose of the Study:

  • To investigate the neuroanatomical correlates of personal and social optimism bias.
  • To determine if distinct brain structures underpin personal versus social optimism.

Main Methods:

  • Participants performed a soccer task, estimating success probabilities in personal and social contexts.
  • Voxel-based morphometry (VBM) analyzed gray matter volume (GMV) in relation to optimism bias measures.

Main Results:

  • Personal optimism bias correlated positively with GMV in the putamen, frontal pole, hippocampus, temporal pole, inferior temporal gyrus, visual association areas, and mid-superior temporal gyrus.
  • Social optimism bias showed a positive correlation with GMV in the temporoparietal junction and a negative correlation with GMV in the inferior temporal gyrus and pre-supplementary motor areas.
  • Behaviorally similar, the two biases were linked to distinct neuroanatomical structures.

Conclusions:

  • Optimism bias has biological underpinnings reflected in specific gray matter volumes.
  • Distinct neural substrates support personal and social optimism bias, suggesting non-identical underlying mechanisms.