caa a22 4500 605542562 CHVBK 20210128100922.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10071-015-0869-x doi (NATIONALLICENCE)springer-10.1007/s10071-015-0869-x When is it worth waiting for? Food quantity, but not food quality, affects delay tolerance in tufted capuchin monkeys [Elektronische Daten] [Francesca De Petrillo, Emanuele Gori, Antonia Micucci, Giorgia Ponsi, Fabio Paglieri, Elsa Addessi] When faced with choices between smaller sooner options and larger later options (i.e. intertemporal choices), both humans and non-human animals discount future rewards. Apparently, only humans consistently show the magnitude effect, according to which larger options are discounted over time at a lower rate than smaller options. Most of the studies carried out in non-human animals led instead to negative results. Here, we tested ten tufted capuchin monkeys (Sapajus spp.) in a delay choice task to evaluate whether they show a magnitude effect when choosing between different quantities of the same food or when the options are represented by high- and low-preferred foods in different conditions. Whereas food quality did not play a role, we provided the first evidence of an effect of the reward amount on temporal preferences in a non-human primate species, a result with potential implications for the validity of comparative studies on the evolution of delay tolerance. In contrast with human results, but as shown in other animal species, capuchins' choice of the larger later option decreased as the amount of the smaller sooner option increased. Capuchins based their temporal preferences on the quantity of the smaller sooner option, rather than on that of the larger later option, probably because in the wild they virtually never have to choose between the above two options at the same time, but they more often encounter them consecutively. Thus, paying attention to the sooner option and deciding on the basis of its features may be an adaptive strategy rather than an irrational response. Springer-Verlag Berlin Heidelberg, 2015 Delay choice task nationallicence Magnitude effect nationallicence Food quantity nationallicence Food quality nationallicence Non-human primates nationallicence De Petrillo Francesca Unit of Cognitive Primatology and Primate Center, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via Ulisse Aldrovandi, 16/b, 00197, Rome, Italy aut Gori Emanuele Unit of Cognitive Primatology and Primate Center, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via Ulisse Aldrovandi, 16/b, 00197, Rome, Italy aut Micucci Antonia Unit of Cognitive Primatology and Primate Center, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via Ulisse Aldrovandi, 16/b, 00197, Rome, Italy aut Ponsi Giorgia Unit of Cognitive Primatology and Primate Center, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via Ulisse Aldrovandi, 16/b, 00197, Rome, Italy aut Paglieri Fabio Goal-Oriented Agents Lab, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via San Martino della Battaglia, 44, 00185, Rome, Italy aut Addessi Elsa Unit of Cognitive Primatology and Primate Center, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via Ulisse Aldrovandi, 16/b, 00197, Rome, Italy aut Animal Cognition Springer Berlin Heidelberg 18/5(2015-09-01), 1019-1029 1435-9448 18:5<1019 2015 18 10071 https://doi.org/10.1007/s10071-015-0869-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10071-015-0869-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- De Petrillo Francesca Unit of Cognitive Primatology and Primate Center, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via Ulisse Aldrovandi, 16/b, 00197, Rome, Italy aut NATIONALLICENCE 700 1- Gori Emanuele Unit of Cognitive Primatology and Primate Center, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via Ulisse Aldrovandi, 16/b, 00197, Rome, Italy aut NATIONALLICENCE 700 1- Micucci Antonia Unit of Cognitive Primatology and Primate Center, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via Ulisse Aldrovandi, 16/b, 00197, Rome, Italy aut NATIONALLICENCE 700 1- Ponsi Giorgia Unit of Cognitive Primatology and Primate Center, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via Ulisse Aldrovandi, 16/b, 00197, Rome, Italy aut NATIONALLICENCE 700 1- Paglieri Fabio Goal-Oriented Agents Lab, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via San Martino della Battaglia, 44, 00185, Rome, Italy aut NATIONALLICENCE 700 1- Addessi Elsa Unit of Cognitive Primatology and Primate Center, Istituto di Scienze e Tecnologie della Cognizione, CNR, Via Ulisse Aldrovandi, 16/b, 00197, Rome, Italy aut NATIONALLICENCE 773 0- Animal Cognition Springer Berlin Heidelberg 18/5(2015-09-01), 1019-1029 1435-9448 18:5<1019 2015 18 10071