Chimpanzees prepare for alternative possible outcomes
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When facing uncertainty, humans often build mental models of alternative outcomes. Considering diverging scenarios allows agents to respond adaptively to different actual worlds by developing contingency plans (covering one's bases). In a pre-registered experiment, we tested whether chimpanzees (Pan troglodytes) prepare for two mutually exclusive possibilities. Chimpanzees could access two pieces of food, but only if they successfully protected them from a human competitor. In one condition, chimpanzees could be certain about which piece of food the human experimenter would attempt to steal. In a second condition, either one of the food rewards was a potential target of the competitor. We found that chimpanzees were significantly more likely to protect both pieces of food in the second relative to the first condition, raising the possibility that chimpanzees represent and prepare effectively for different possible worlds.
Engelmann , J M , Völter , C J , Goddu , M K , Call , J , Rakoczy , H & Hermann , E 2023 , ' Chimpanzees prepare for alternative possible outcomes ' , Biology Letters , vol. 19 , no. 6 , 20230179 . https://doi.org/10.1098/rsbl.2023.0179
Copyright © 2023 The Author(s). Published by the Royal Society. This work has been made available online in accordance with the University of St Andrews Open Access policy. This accepted manuscript is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. The final published version of this work is available at https://doi.org/10.1098/rsbl.2023.0179.
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