Main findings

Cooperation and prosociality:

  • No group-level cooperation and prosociality was found
  • Low inter-individual tolerance was found


  • Three personality traits were evaluated in the group:
    • Activity
    • Sociability
    • Exploration – significantly predicted the (low instances of) cooperative success

Dominance rank, age, sex:

  • Individuals that were more distant in the dominance hierarchy tended to cooperate more
  • Activity significantly decreased with age
  • No effect of sex was found

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