期刊
BEHAVIOURAL PROCESSES
卷 196, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.beproc.2022.104602
关键词
Social influences; Prosocial behavior; Gambling task; Decision-making; Emotional responses; Probabilistic Choice
资金
- L' Oreal Italia per le Donne e la Scienza 2016, Italy
- EU [603016]
This study investigated the impact of the presence of a conspecific on risky decision-making in male rats. The results showed that rats were more risk-prone when paired with a conspecific, but also experienced a higher level of motivational conflict.
Although both human and non-human animals, in everyday life, deal with risky decisions in a social environment, few studies investigated how social dimension influences risk preferences (i.e., if consequences on others feeds back over own choice). Here, we assessed whether the presence of a conspecific, acting as a potential competitor for the same food resource, influenced risky decision-making in male rats. Subjects received a series of choices between a safe option (always yielding a small yet optimal reward, solely to itself) and a risky option (yielding a larger but suboptimal reward, one third of times to itself and two third of times delivered to the other half cage); rats were tested twice, both alone and paired with a conspecific, recipient of own-lost food and hence acting as potential competitor. Results showed that focal subjects were more risk-prone when paired with a conspecific than when tested alone. However, rats exhibited also a higher motivational conflict with a competing bystander present than alone: data suggest that the primary drive was to increase own food rather than either a competitive or prosocial tendency. Overall, for rats tested in a risky-choice task, a competitive social context increased the salience and attractiveness of larger food outcomes, as observed in humans and great apes. This led to the economically irrational response of selecting the binge-but-risky option, notwithstanding uncertainty about the actual recipient of such food.
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