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Human cooperation in groups: variation begets variation.

Pieter van den Berg1, Lucas Molleman1,2, Jaakko Junikka3,4

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|November 5, 2015
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Area of Science:

  • Behavioral Economics
  • Social Psychology
  • Game Theory

Background:

  • Individual cooperation tendencies vary systematically.
  • People adjust behavior based on group cooperation levels.
  • Responses to peer cooperativeness heterogeneity are understudied.

Purpose of the Study:

  • Investigate how individuals respond to heterogeneous cooperativeness in a public goods game.
  • Determine if and how people react to varied cooperation levels within their group.

Main Methods:

  • Experimental public goods game design.
  • Analysis of subject contributions under varying peer heterogeneity.
  • Correlation of responses to heterogeneity with general cooperation levels.

Main Results:

  • A majority of subjects responded to peer heterogeneity.
  • Most subjects decreased contributions with increased heterogeneity.
  • A significant minority increased contributions with increased heterogeneity.

Conclusions:

  • Social responsiveness to heterogeneity manifests in diverse ways.
  • Positive responses to heterogeneity correlate with higher general cooperation.
  • Heterogeneity response diversity impacts cooperative interaction outcomes.