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Give What You Get: Capuchin Monkeys (Cebus apella) and 4-Year-Old Children Pay Forward Positive and Negative Outcomes to Conspecifics

Figure 1

Testing apparatus used for monkeys.

Monkey Actors pulled one of the two levers to choose an outcome to distribute to the Receiver situated on the other side of the apparatus.

Figure 1

doi: https://doi.org/10.1371/journal.pone.0087035.g001