Abstract # 4442 Event # 42:

Scheduled for Thursday, June 20, 2013 03:15 PM-03:30 PM: Session 7 (Las Olas) Oral Presentation


CHIMPANZEES (PAN TROGLODYTES) TRANSFER TOKENS TO ACCUMULATE REWARDS IN A SELF-CONTROL TASK

A. E. Parrish1,2, B. M. Perdue1,2, T. A. Evans1,2 and M. J. Beran1,2
1Georgia State University, Atlanta, GA 30314, USA, 2Language Research Center
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     Self-control has been studied extensively among human and nonhuman animals, yet there is little research investigating the interaction between social behavior and self-control. In the current study, we examined self-control using an accumulation paradigm – a task in which food is continuously delivered to a subject until it ends the accumulation by taking the bowl or consuming any of the food. Here chimpanzees were required to transfer a token back and forth with a partner animal to gradually accumulate food rewards. At any point in time, either chimpanzee could end the accumulation of food for both individuals by taking its own bowl of food. Thus, this task presented a novel addition to self-control paradigms in that both the subject and partner’s self-control (or lack thereof) affected the outcome for each individual. Chimpanzees readily engaged the token transfer task with their partner, accumulating the majority of rewards across a number of experimental phases including a new-partner phase, experimenter-absent phase, and food-within-reach phase. Next, chimpanzees chose between an immediately available food option and the token that could be transferred back and forth with their partner to obtain a more delayed but potentially larger food quantity. In this phase, chimpanzees typically chose the option that led to the larger quantity of food, even if it meant foregoing the immediately available food option. Supported by NIH (HD060563).