Self-control depletion in tufted capuchin monkeys (Sapajus spp.): does delay of gratification rely on a limited resource?

Frontiers in Psychology
Francesca De PetrilloElsa Addessi

Abstract

Self-control failure has enormous personal and societal consequences. One of the most debated models explaining why self-control breaks down is the Strength Model, according to which self-control depends on a limited resource. Either previous acts of self-control or taking part in highly demanding cognitive tasks have been shown to reduce self-control, possibly due to a reduction in blood glucose levels. However, several studies yielded negative findings, and recent meta-analyses questioned the robustness of the depletion effect in humans. We investigated, for the first time, whether the Strength Model applies to a non-human primate species, the tufted capuchin monkey. We tested five capuchins in a self-control task (the Accumulation task) in which food items were accumulated within individual's reach for as long as the subject refrained from taking them. We evaluated whether capuchins' performance decreases: (i) when tested before receiving their daily meal rather than after consuming it (Energy Depletion Experiment), and (ii) after being tested in two tasks with different levels of cognitive complexity (Cognitive Depletion Experiment). We also tested, in both experiments, how implementing self-control in each trial of the Acc...Continue Reading

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Citations

Jun 28, 2016·Behavioural Processes·J FagnaniM Bentosela
Aug 17, 2016·Behavioral Sciences·Audrey E ParrishMichael J Beran
Aug 10, 2016·Primates; Journal of Primatology·Marco LucarelliEsterina Pascale

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