Working memory in capuchin monkeys (Cebus apella)

Tavares, Maria Clotilde Henriques; Tomaz, Carlos

doi:10.1016/s0166-4328(01)00368-0

Cited by 54 publications

(48 citation statements)

References 33 publications

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“…Brain size is generally associated with cognitive performance [5]. Capuchin monkeys show complex tool use in the wild [6] and superior performance on laboratory memory tasks [7].…”

Section: Introductionmentioning

confidence: 99%

Marmoset monkeys evaluate third-party reciprocity

et al. 2014

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Many non-human primates have been observed to reciprocate and to understand reciprocity in one-to-one social exchanges. A recent study demonstrated that capuchin monkeys are sensitive to both third-party reciprocity and violation of reciprocity; however, whether this sensitivity is a function of general intelligence, evidenced by their larger brain size relative to other primates, remains unclear. We hypothesized that highly pro-social primates, even with a relatively smaller brain, would be sensitive to others' reciprocity. Here, we show that common marmosets discriminated between human actors who reciprocated in social exchanges with others and those who did not. Monkeys accepted rewards less frequently from non-reciprocators than they did from reciprocators when the non-reciprocators had retained all food items, but they accepted rewards from both actors equally when they had observed reciprocal exchange between the actors. These results suggest that mechanisms to detect unfair reciprocity in third-party social exchanges do not require domain-general higher cognitive ability based on proportionally larger brains, but rather emerge from the cooperative and pro-social tendencies of species, and thereby suggest this ability evolved in multiple primate lineages.

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“…Brain size is generally associated with cognitive performance [5]. Capuchin monkeys show complex tool use in the wild [6] and superior performance on laboratory memory tasks [7].…”

Section: Introductionmentioning

confidence: 99%

Marmoset monkeys evaluate third-party reciprocity

et al. 2014

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“…Previous studies using DMTS tasks in nonhuman species have focused mainly on the assessment of the limits of the retrieval of information stored in shortand long-term memory systems. The results of these DMTS studies show that animals of different species (e.g., [6,7,34] capuchin monkeys; [8,35] macaques; [9] baboons; [11] crows; [12,27] pigeons; see also [35][36][37] for reviews on this topic) are able to perform correct stimulus matching even, in some cases, with delays of several minutes interposed between the offset of the sample and the presentation of the comparison stimuli. However, these works were especially aimed at identifying the length of time intervals which cause recognition accuracy to fall to chance level.…”

Section: Introductionmentioning

confidence: 99%

Effects of brief time delays on matching-to-sample abilities in capuchin monkeys (Sapajus spp.)

Truppa

Simone

Mortari

et al. 2014

Behavioural Brain Research

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Traditionally, studies of delayed matching-to-sample (DMTS) tasks in nonhuman species have focused on the assessment of the limits of the retrieval of information stored in short-and longterm memory systems. However, it is still unclear if visual recognition in these tasks is affected by very brief delay intervals, which are typically used to study rapidly decaying types of visual memory. This study aimed at evaluating if tufted capuchin monkeys' ability to recognise visual stimuli in a DMTS task is affected by (i) the disappearance of the sample stimulus and (ii) the introduction of delay intervals (0.5, 1.0, 2.0 and 3.0 seconds) between the disappearance of the sample and the presentation of the comparison stimuli. The results demonstrated that the simple disappearance of the sample and the introduction of a delay of 0.5 seconds did not affect capuchins' performance either in terms of accuracy or response time. A delay interval of 1.0 second produced a significant increase in response time but still did not affect recognition accuracy. By contrast, delays of 2.0 and 3.0 seconds determined a significant increase in response time and a reduction in recognition accuracy. These findings indicate the existence in capuchin monkeys of processes enabling a very accurate retention of stimulus features within time frames comparable to those reported for humans' sensory memory (0.5-1.0 seconds). The extent to which such processes can be considered analogous to the sensory memory processes observed in human visual cognition is discussed. We examine capuchin monkeys' ability to match visual stimuli after brief delays. 0.5 sec intervals do not affect either response accuracy or response time.  1.0 sec intervals do not affect response accuracy but increase response time. 2.0 and 3.0 sec intervals decrease response accuracy and increase response time. Effects consistent with those ascribed to iconic memory in humans. Research Highlights Responses to the ReviewerWe were extremely pleased that the reviewer was satisfied with the vast majority of our revisions and that s/he felt that we had been very responsive and addressed most of her/his concerns. We are also pleased to read that the reviewer felt that all her/his specific comments have been addressed.We have now further revised the article in several places (P 4 lines 46-48; P 6 lines 53-59; P 7 lines 1-3; P 13 lines 44-49; P 14 lines 1-7; P 18 lines 48-54; P 18 line 56 -P 19 line 1) in order to make it absolutely clear that we make no claims regarding the high-capacity of the memory system that we have observed in capuchin monkeys so that, in that respect it could be considered analogous to human iconic memory. All our claims are based on analyses of the effects of time delay which, because they suggest a discontinuous function of the delays, can be considered indicative of separate memory processes at early stages of the encoding of visual information in monkeys.As suggested by the reviewer we now present effect sizes for paired t tests and 95% confidence in...

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“…The main justification for studies on Cebus is due to little information about the anatomy related to C.libidinosus in Brazilian and worldwide scientific literature, and this neotropical primate has attracted attention due to their encephalization index (Roth & Dick, 2005), which is higher than that of Old World primates, such as gorillas (Gorilla gorilla) and identical to chimpanzees (Pan troglodytes), and to their complex cultural behavior (Lopes 2004) such as use of tools (Antinucci & Visalberghi 1986), and the welldeveloped memory (Tavares & Tomaz 2002). In the Yerkes National Primate Research Center in Atlanta, United States of America, a research on the social behavior of these animals is being carried out (Waal 2005), showing the worldwide interest on this primate.…”

Section: Introductionmentioning

confidence: 99%

Comparative anatomy of the thigh nerves of Cebus libidinosus (Rylands et al., 2000)

et al. 2011

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RESUMO.-[Anatomia comparativa dos nervos da coxa de Cebus libidinosus (Rylands et al., 2000).]Primatas não-humanos têm constituído um importante grupo entre os animais submetidos a vários estudos. Estudos etológi-cos, evolutivos e paleontológicos revelaram alterações das estruturas anatômicas ligada à evolução dos primatas, considerado em estudos sobre a anatomia comparativa entre Cebus libidinosus e outros primatas neotropicais ou provenientes do Velho Mundo, e as modalidades de conhecimento sobre sua anatomia pode representar um fator importante para a sua preservação e proteção quando os animais são levados às clínicas veterinárias após acidentes ou doenças. Em termos de importância veterinária, ás vezes esses animais chegam na clínica médica veteriná-ria após acidentes, necessitando de cirurgia ou tratamento clínico, mas os poucos dados disponíveis sobre a anatomia tem dificultado o procedimento correto. A principal justificativa para os estudos sobre C. libidinosus é devido a pouca informação sobre sua anatomia na literatura cientí- Non-human primates have constituted an important group among animals subjected to various studies. Ethological, evolutionary and paleontological studies have revealed changes in anatomical structures linked to the evolution of primates, considered in studies on the comparative anatomy between Cebus libidinosus and other neotropical monkeys or those from the Old World, and the detailed knowledge on their anatomy may represent an important factor for their preservation and protection when the animals are brought to veterinary clinics after accidents or illnesses. In terms of veterinary importance, sometimes these animals arrive in the veterinary medical clinics after accidents, needing surgery or clinical treatment, but the little data available on anatomy has impaired the correct proceedings. The main justification for studies on C. libidinosus, is due to little information about the anatomy related to C. libidinosus in Brazilian and worldwide scientific literature. In this study, the distribution, enervation and path of the femoral and sciatic nerves of the pelvic limb (thigh) of C. libidinosus were studied and these results were compared with literature on the anatomy of humans, chimpanzees and baboons. In general, the enervation model of the four primates is identical, but in specific terms, the differences in enervations indicate evolution convergence closer to the branch of baboons in the evolutionary tree, and these data corroborate other comparative studies in relation to the same primates to vessels, muscles and nerves. In conclusion, the nerve organization in the thigh of C. libidinosus is identical to baboon, chimpanzee and homo, but more similar to baboon. The specific differences found indicate an ancient phylogenic origin to C. libidinosus and baboons (data corroborated by other studies). Roqueline A.G.M.F. fica no Brasil e no mundo. Neste trabalho, a distribuição, inervação e os trajetos dos nervos femoral e isquiático do membro pélvico (coxa) de C. libidinosus for...

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Working memory in capuchin monkeys (Cebus apella)

Cited by 54 publications

References 33 publications

Marmoset monkeys evaluate third-party reciprocity

Marmoset monkeys evaluate third-party reciprocity

Effects of brief time delays on matching-to-sample abilities in capuchin monkeys (Sapajus spp.)

Comparative anatomy of the thigh nerves of Cebus libidinosus (Rylands et al., 2000)

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