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Area of Science:

  • Neuroscience
  • Social Psychology
  • Cognitive Science

Background:

  • Theoretical models emphasize honesty's role in trustworthiness and trust.
  • Empirical evidence linking honesty, trustworthiness impressions, and neural correlates of trust is limited.

Purpose of the Study:

  • To investigate the neural underpinnings of honesty-based trustworthiness.
  • To determine if brain activity associated with honesty predicts subsequent trusting behavior.

Main Methods:

  • Utilized a novel paradigm to induce trustworthiness impressions.
  • Employed functional magnetic resonance imaging (fMRI) with multivariate analyses.
  • Examined brain signal prediction of individual trust in social interactions.

Main Results:

  • Honesty-based trustworthiness is neurally represented in the posterior cingulate cortex, dorsolateral prefrontal cortex, and intraparietal sulcus.
  • Brain signals in these regions predicted subsequent trust.
  • Honesty recruited the ventromedial prefrontal cortex (VMPFC); enhanced VMPFC-temporoparietal junction connectivity correlated with higher trust.

Conclusions:

  • Honesty signals in the VMPFC are integrated into trustworthiness beliefs.
  • These neural processes inform immediate and future social behaviors.
  • Findings elucidate the neural basis of social character evaluation guiding interpersonal interactions.