Now showing items 1-19 of 19

  • Chimpanzees coordinate in a snowdrift game 

    Sánchez-Amaro, Alejandro; Duguid, Shona; Call, Josep; Tomasello, Michael (2016-06) - Journal article
    The snowdrift game is a model for studying social coordination in the context of competing interests. We presented pairs of chimpanzees, Pan troglodytes, with a situation in which they could either pull a weighted tray ...
  • Differences in the ability of apes and children to instruct others using gestures 

    Grosse, Katja; Call, Josep; Carpenter, Malinda; Tomasello, Michael (2015) - Journal article
    In all human cultures, people gesture iconically. However, the evolutionary basis of iconic gestures is unknown. In this study, chimpanzees and bonobos, and 2- and 3-year-old children, learned how to operate two apparatuses ...
  • Differences in the cognitive skills of bonobos and chimpanzees 

    Herrmann, Esther; Hare, Brian; Call, Josep; Tomasello, Michael (2010-08-27) - Journal article
    While bonobos and chimpanzees are both genetically and behaviorally very similar, they also differ in significant ways. Bonobos are more cautious and socially tolerant while chimpanzees are more dependent on extractive ...
  • Differing views - can chimpanzees do level 2 perspective-taking? 

    Karg, Katja; Schmelz, Martin; Call, Josep; Tomasello, Michael (2016-05) - Journal article
    Although chimpanzees understand what others may see, it is unclear if they understand how others see things (Level 2 perspective-taking). We investigated whether chimpanzees can predict the behavior of a conspecific which ...
  • The effects of collaboration and minimal-group membership on children's prosocial behavior, liking, affiliation, and trust 

    Plötner, Maria; Over, Harriet; Carpenter, Malinda; Tomasello, Michael (2015-11) - Journal article
    Recent theoretical work has highlighted potential links between interpersonal collaboration and group membership in the evolution of human sociality. Here we compared the effects of collaboration and minimal-group membership ...
  • Evidence for Emulation in Chimpanzees in Social Settings Using the Floating Peanut Task 

    Tennie, Claudio; Call, Josep; Tomasello, Michael (2010-05-12) - Journal article
    Background: It is still unclear which observational learning mechanisms underlie the transmission of difficult problem-solving skills in chimpanzees. In particular, two different mechanisms have been proposed: imitation ...
  • The goggles experiment : can chimpanzees use self-experience to infer what a competitor can see? 

    Karg, Katja; Schmelz, Martin; Call, Josep; Tomasello, Michael (2015-07) - Journal article
    In two experiments, we investigated whether chimpanzees, Pan troglodytes, can use self-experience to infer what another sees. Subjects first gained self-experience with the visual properties of an object (either opaque or ...
  • Great apes anticipate that other individuals will act according to false beliefs 

    Krupenye, Christopher Nicholas; Kano, Fumihiro; Hirata, Satoshi; Call, Josep; Tomasello, Michael (2016-10-07) - Journal article
    Humans operate with a "theory-of-mind" with which they understand that others’ actions are driven not by reality but by beliefs about reality, even when those beliefs are false. Although great apes share with humans many ...
  • Great apes distinguish true from false beliefs in an interactive helping task 

    Buttelmann, David; Buttelmann, Frances; Carpenter, Malinda; Call, Josep; Tomasello, Michael (2017-04-05) - Journal article
    Understanding the behavior of others in a wide variety of circumstances requires an understanding of their psychological states. Humans’ nearest primate relatives, the great apes, understand many psychological states of ...
  • Identifying partially schematic units in the code-mixing of an English and German speaking child 

    Endesfelder Quick, Antje; Lieven, Elena; Carpenter, Malinda; Tomasello, Michael (2017-03-07) - Journal article
    Intra-sentential code-mixing presents a number of puzzles for theories of bilingualism. In this paper, we examine the code-mixed English-German utterances of a young English-German-Spanish trilingual child between 1;10 – ...
  • Limitations to the cultural ratchet effect in young children 

    Tennie, Claudio; Walter, Victoria; Gampe, Anja; Carpenter, Malinda; Tomasello, Michael (2014-10) - Journal article
    Although many animal species show at least some evidence of cultural transmission, broadly defined, only humans show clear evidence of cumulative culture. In the current study, we investigated whether young children show ...
  • Production and comprehension of gestures between orang-utans (Pongo pygmaeus) in a referential communication game 

    Moore, Richard; Call, Josep; Tomasello, Michael (2015-06-19) - Journal article
    Orang-utans played a communication game in two studies testing their ability to produce and comprehend requestive pointing. While the 'communicator' could see but not obtain hidden food, the 'donor' could release the food ...
  • The role of past interactions in great apes’ communication about absent entities 

    Bohn, Manuel; Call, Josep; Tomasello, Michael (2016-11) - Journal article
    Recent evidence suggests that great apes can use the former location of an entity to communicate about it. In this study we built on these findings to investigate the social cognitive foundations of great apes’ communicative ...
  • A test of the submentalizing hypothesis : apes' performance in a false belief task inanimate control 

    Krupenye, Christopher; Kano, Fumihiro; Hirata, Satoshi; Call, Josep; Tomasello, Michael (2017-09) - Journal article
    Much debate concerns whether any nonhuman animals share with humans the ability to infer others' mental states, such as desires and beliefs. In a recent eye-tracking false-belief task, we showed that great apes correctly ...
  • Thirty years of great ape gestures 

    Tomasello, Michael; Call, Josep (2018-02-21) - Journal article
    We and our colleagues have been doing studies of great ape gestural communication for more than 30 years. Here we attempt to spell out what we have learned. Some aspects of the process have been reliably established by ...
  • Three-year-olds' understanding of the consequences of joint commitments 

    Graefenhain, Maria; Carpenter, Malinda; Tomasello, Michael (2013-09-04) - Journal article
    Here we investigate the extent of children's understanding of the joint commitments inherent in joint activities. Three-year-old children either made a joint commitment to assemble a puzzle with a puppet partner, or else ...
  • Untrained  chimpanzees (Pan troglodytes schweinfurthii) fail to imitate novel actions 

    Tennie, Claudio; Call, Josep; Tomasello, Michael (2012-08-08) - Journal article
    Background: Social learning research in apes has focused on social learning in the technical (problem solving) domain - an approach that confounds action and physical information. Successful subjects in such studies may ...
  • What is a group? Young children's perceptions of different types of groups and group entitativity 

    Plötner, Maria; Over, Harriet; Carpenter, Malinda; Tomasello, Michael (2016-03-24) - Journal article
    To date, developmental research on groups has focused mainly on in-group biases and intergroup relations. However, little is known about children’s general understanding of social groups and their perceptions of different ...
  • Young children show the bystander effect in helping situations 

    Plötner, Maria; Over, Harriet; Carpenter, Malinda; Tomasello, Michael (2015-04) - Journal article
    Much research in social psychology has shown that otherwise helpful people often fail to help when bystanders are present. Research in developmental psychology has shown that even very young children help, and that others’ ...