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Area of Science:

  • Neuroscience
  • Social Psychology
  • Computational Neuroscience

Background:

  • Widely shared information significantly influences societal norms and behaviors.
  • Neuroimaging studies indicate the ventromedial prefrontal cortex (vmPFC), a key component of the brain's valuation system, correlates with information sharing.
  • The precise mechanisms connecting individual vmPFC responses to population-level sharing behaviors remain incompletely understood.

Purpose of the Study:

  • To investigate the neural mechanisms linking individual vmPFC activity to population-level information sharing.
  • To explore how social consensus about information value and individual news consumption habits modulate vmPFC responses.
  • To identify neural correlates, such as functional connectivity, associated with effective tracking of collective wisdom.

Main Methods:

  • Employed a multilevel brain-as-predictor approach to analyze neuroimaging data.
  • Examined the relationship between individual vmPFC activity, social consensus on article value, and population news sharing.
  • Utilized functional connectivity analyses to assess the interplay between vmPFC and other brain regions, particularly the dorsolateral prefrontal cortex (dlPFC).

Main Results:

  • Individual differences in vmPFC activity's correspondence with sharing behavior were linked to its alignment with social consensus on article value.
  • News consumption frequency modulated vmPFC responses: frequent readers showed consistent high activity, while infrequent readers' activity was specific to highly shared articles.
  • Higher consensus tracking was associated with reduced vmPFC connectivity to the dlPFC, a region involved in controlled processing.

Conclusions:

  • Demonstrated significant variability in the brain's ability to track collective wisdom regarding information value.
  • Identified stimulus experience (news consumption) and vmPFC-dlPFC connectivity as potential psychological and neural factors influencing this variability.
  • Suggests that reduced dlPFC connectivity may facilitate the tracking of crowd wisdom about information value.