Ape Language Research Articles

Shared semantics: Exploring the interface between human and chimpanzee gestural communication

Striking similarities across ape gestural repertoires suggest shared phylogenetic origins that likely provided a foundation for the emergence of language. We pilot a novel approach for exploring possible semantic universals across human and nonhuman ape species. In a forced‐choice task, n = 300 participants watched 10 chimpanzee gesture forms performed by a human and chose from responses that paralleled inferred meanings for chimpanzee gestures. Participants agreed on a single meaning for nine gesture forms; in six of these the agreed form‐meaning pair response(s) matched those established for chimpanzees. Such shared understanding suggests apes' (including humans') gesturing shares deep evolutionary origins.

Meningkatkan Bahasa Anak Melalui APE di Kelompok B2 TK Paud Terpadu Al-Madinah

The purpose of writing this article is to see how the initial language is improved by using educational games (APE). Action Research in AL-MAIDNAH INTEGRATED PAUD Kindergarten. This research is based on consistency in planning the action itself, observing and reflecting on educational institutions. The subjects in this study were children of AL-MADINAH INTEGRATED PAUD Kindergarten who had problems with language skills. The method used is to use a non-text method, accompanied by documentation and also photo documentation. The results obtained. APE can improve your child's language skills in kindergarten. The application of APE language skills in schools can be influenced by factors such as teacher competence, school facilities and children. The synergistic effect on the elements of children's language skills increases optimally.

Evidence of Grammatical Knowledge in Apes: An Analysis of Kanzi's Performance on Reversible Sentences.

Ape language acquisition studies have demonstrated that apes can learn arbitrary mappings between different auditory or visual patterns and concepts, satisfying the definition of symbol use. The extent to which apes understand aspects of grammar is less well accepted. On the production side, several studies have shown that apes sometimes combine two or more symbols together, in non-random patterns. However, this is quite limited compared to human language production. On the comprehension side, much greater abilities have been reported in apes. One of the most famous examples is Kanzi, a bonobo who reportedly responded correctly to a large number of novel commands. However, based on his performance on a small subset of reversible sentences—where the understanding of English syntax was critical—the extent to which he demonstrated grammatical knowledge has been questioned. Using a randomization study it is shown here that his performance actually vastly exceeds random chance, supporting the contention that he does in fact understand word order grammatical rules in English. This of course represents only one aspect of English grammar, and does not suggest he has completely human grammatical abilities. However, it does show that he understands one of the arbitrary grammatical devices used in many languages: The use of word order to code argument relations. It also removes from serious consideration the view that apes lack any kind of grammatical ability. From an evolutionary perspective, Kanzi’s ability is most likely to result from homologous brain circuitry, although this is ultimately an empirical question.

Darwin’s hug

This article reviews accounts of “hugging” across evolutionary paradigms to expose how understandings of gesture are shaped by scientific theorizations of the ways humans and animals differ. The divergent roles assigned to gesture in human communication by Vygotskian and Chomskyan researchers can be traced to research on human exceptionalism during key historical periods in the Soviet Union and United States. When Vygotsky introduced his sociocultural theory of cognitive development during the early Soviet period, human exceptionalism was tested through reproductive crossbreeding. When Chomsky hypothesized a language acquisition device for the human brain during the Civil Rights era, human exceptionalism was tested through interspecies communication. These scientific histories inspired critically different approaches to gestural meaning. Taking a fresh look at the great ape language debates of the 1970s, the article attributes the dismissal of ethnography in late twentieth-century human language study to a developing experimental protocol that required gesture’s eviction.

Words matter: Reflections on language projects with chimpanzees and their implications.

Beginning in the 1960s the first systematic projects dedicated to testing whether great apes could acquire some aspects of human language were conducted. The ape subjects demonstrated remarkable capacities to learn and use elements of either sign language or an artificial language. The results from research across several laboratories drew a mixture of excitement and skepticism, and critiques and debates have ensued since the earliest reports were published. This continues today. Terrace (2019, Nim: A chimpanzee who learned sign language. New York, NY: Columbia University Press) repeats many of the same points made decades earlier, and has added some additional critiques. That scientists hold different perspectives on what to conclude from ape language studies is expected. However, any conclusion one draws should be based upon available evidence, which we outline in this review. We also address the critiques offered by Terrace (2019), including the stance that apes cannot understand or use words. Focusing on symbol use by chimpanzees and bonobos we describe evidence that argues for understanding of words, including capacities for declarative communication and intersubjectivity found in these apes. We conclude that the many decades of research using a variety of symbol systems challenges the absolutist position that chimpanzees and bonobos cannot learn language or understand the concept of a word.

Человек и обезьяна: к контекстуализации ранних экспериментов в области Ape Language Research

Человек и обезьяна: к контекстуализации ранних экспериментов в области Ape Language Research

Biosemiotics Achievement Award for the Year 2018

Established at the annual meeting of the International Society for Biosemiotic Studies (ISBS) on July3rd 2014, in conjunction with Springer Publishing, publishers of the Society’s official journal, Biosemiotics,the Annual Biosemiotic Achievement Award seeks to recognize those papers published in the journal thatpresent novel and potentially important contributions to the ongoing project of biosemiotic research, itsscientific impact, and its future prospects. Here the winner of the Biosemiotics Achievement Award for 2018is announced: the award goes to Mirko Cerrone for his article ‘Umwelt and Ape Language Experiments: onthe Role of Iconicity in the Human-Ape Pidgin Language’.

Umwelt and Ape Language Experiments: on the Role of Iconicity in the Human-Ape Pidgin Language

Several language experiments have been carried out on apes and other animals aiming to narrow down the presumed qualitative gap that separates humans from other animals. These experiments, however, have been driven by the understanding of language as a purely symbolic sign system, often connected to a profound disinterest for language use in real situations and a propensity to perceive grammatical and syntactic information as the only fundamental aspects of human language. For these reasons, the language taught to apes tends to discard iconic and indexical elements in favour of symbolic signs. This paper sheds light on the iconic components of human language, with close attention to the iconic properties of language as present in the ape language experiments. We emphasise the role of the body in the interpretation and production of iconic signs, while demonstrating the need to take into account the Umwelt theory in the research paradigm of the experiments. Uexkull’s Umwelt theory is used to exemplify the methodological problems connected to the teaching of human language to other animal species; furthermore, we discuss how the modelling capacities of language affect the biological layer that constitutes the animal Umwelt. Language is analysed as a particular case of Umwelt transition (Tonnessen), and as such its implications are further discussed in the article. With this paper, we enrich the discussion surrounding the human-ape pidgin language by advocating for the need to include iconic components as vital parts of this research area. With this inclusion, we uncover the inter-dependency of iconic, indexical and symbolic signs in human language, aiming to further develop the research paradigm of the ape language experiments.

Bonobo and chimpanzee gestures overlap extensively in meaning.

Cross-species comparison of great ape gesturing has so far been limited to the physical form of gestures in the repertoire, without questioning whether gestures share the same meanings. Researchers have recently catalogued the meanings of chimpanzee gestures, but little is known about the gesture meanings of our other closest living relative, the bonobo. The bonobo gestural repertoire overlaps by approximately 90% with that of the chimpanzee, but such overlap might not extend to meanings. Here, we first determine the meanings of bonobo gestures by analysing the outcomes of gesturing that apparently satisfy the signaller. Around half of bonobo gestures have a single meaning, while half are more ambiguous. Moreover, all but 1 gesture type have distinct meanings, achieving a different distribution of intended meanings to the average distribution for all gesture types. We then employ a randomisation procedure in a novel way to test the likelihood that the observed between-species overlap in the assignment of meanings to gestures would arise by chance under a set of different constraints. We compare a matrix of the meanings of bonobo gestures with a matrix for those of chimpanzees against 10,000 randomised iterations of matrices constrained to the original data at 4 different levels. We find that the similarity between the 2 species is much greater than would be expected by chance. Bonobos and chimpanzees share not only the physical form of the gestures but also many gesture meanings.

The Fully Conscious Ape

Duane Rumbaugh was one of the first primatologists of the modern era (which began after WWII), to engage in comparative studies of the cognitive capacities of nonhuman primates. In fact, it was Rumbaugh who drew the world's attention to the Order Primates and who helped initiate the International Primatological Society, IPS, the first academic society to be organized around an Order rather than a discipline. His work eventually led in two directions, first the development of the Transfer Index, a was completely new way of looking at learning. The TI seperated monkeys from apes as completely as did Gallup's mirror task. From this arose the Primate Test Battery, a video based system to test cognitive skills across a wide range of tasks from memory to numerical skils in primates. The other direction was to look at language and its effect on cognition. Only Apes succeeded in the laguage tasks. With Lana's success arose a raft of critiques that - in the light of more recent findings about the structure of human language, are now rendered invalid. Rumbaugh's initial findings in all domains has remained sound. This includes fundamental differences between monkeys and apes in their capacity to spontaneously begin control their attention, to consciously monitor their own behavior, and then to alter it deliberately, or by their own choice. It is the ape's conscious capacity to control its attention and to conciously monitor outcomes in a cause/effect manner, that allows for the acquisition of langauge. This also allows for the creation of "personal self", as a being that exists apart from the current experience of the self. Language greatly assists the emergence of this ability in apes, as does early rearing in which the ape is carried but not seperated from its mother. This allows pointing and joint reference to appear far ahead of schedule and for the spontaneouls development of human language in cross-species co-reared apes. The presence of a wild-reared mother (not present in other captive environments)also allows for the emergence of a nonhuman form of vocal language. The implications of this work for future investigations of apes are discussed.

Convergence and divergence in gesture repertoires as an adaptive mechanism for social bonding in primates.

A key challenge for primates living in large, stable social groups is managing social relationships. Chimpanzee gestures may act as a time-efficient social bonding mechanism, and the presence (homogeneity) and absence (heterogeneity) of overlap in repertoires in particular may play an important role in social bonding. However, how homogeneity and heterogeneity in the gestural repertoire of primates relate to social interaction is poorly understood. We used social network analysis and generalized linear mixed modelling to examine this question in wild chimpanzees. The repertoire size of both homogeneous and heterogeneous visual, tactile and auditory gestures was associated with the duration of time spent in social bonding behaviour, centrality in the social bonding network and demography. The audience size of partners who displayed similar or different characteristics to the signaller (e.g. same or opposite age or sex category) also influenced the use of homogeneous and heterogeneous gestures. Homogeneous and heterogeneous gestures were differentially associated with the presence of emotional reactions in response to the gesture and the presence of a change in the recipient's behaviour. Homogeneity and heterogeneity of gestural communication play a key role in maintaining a differentiated set of strong and weak social relationships in complex, multilevel societies.

Apes in conversation: The role of the human interlocutor

Ape Language Research has primarily focused on formal linguistic abilities of apes, rather than on the cultural and pragmatic aspects of language found in socio-communicative interactions. Studies with humans exhibiting non-standard language abilities, such as autistic children, have shown that the interlocutor play a constitutive role in enabling communication with these individuals. This contrasts with a general view in primatology that human influence may lead to unjustified anthropomorphism. Through an analysis of conversations between symbolically competent bonobos and humans using the concept of conversational implicature, it will be shown that the assumptions made by the interlocutor are crucial in establishing communicative intersubjectivity. The communicative exchange takes the form of a more distributed activity, a feature also exhibited by non-standard human language subjects.

Meaning and ostension in great ape gestural communication.

It is sometimes argued that while human gestures are produced ostensively and intentionally, great ape gestures are produced only intentionally. If true, this would make the psychological mechanisms underlying the different species' communication fundamentally different, and ascriptions of meaning to chimpanzee gestures would be inappropriate. While the existence of different underlying mechanisms cannot be ruled out, in fact claims about difference are driven less by empirical data than by contested assumptions about the nature of ostensive communication. On some accounts, there are no reasons to doubt that great ape gestural communication is ostensive. If these accounts are correct, attributions of meaning to chimpanzee gestures would be justified.

Body language: The interplay between positional behavior and gestural signaling in the genus Pan and its implications for language evolution.

The gestural repertoires of bonobos and chimpanzees are well documented, but the relationship between gestural signaling and positional behavior (i.e., body postures and locomotion) has yet to be explored. Given that one theory for language evolution attributes the emergence of increased gestural communication to habitual bipedality, this relationship is important to investigate. In this study, we examined the interplay between gestures, body postures, and locomotion in four captive groups of bonobos and chimpanzees using ad libitum and focal video data. We recorded 43 distinct manual (involving upper limbs and/or hands) and bodily (involving postures, locomotion, head, lower limbs, or feet) gestures. In both species, actors used manual and bodily gestures significantly more when recipients were attentive to them, suggesting these movements are intentionally communicative. Adults of both species spent less than 1.0% of their observation time in bipedal postures or locomotion, yet 14.0% of all bonobo gestures and 14.7% of all chimpanzee gestures were produced when subjects were engaged in bipedal postures or locomotion. Among both bonobo groups and one chimpanzee group, these were mainly manual gestures produced by infants and juvenile females. Among the other chimpanzee group, however, these were mainly bodily gestures produced by adult males in which bipedal posture and locomotion were incorporated into communicative displays. Overall, our findings reveal that bipedality did not prompt an increase in manual gesturing in these study groups. Rather, body postures and locomotion are intimately tied to many gestures and certain modes of locomotion can be used as gestures themselves.

The Meanings of Chimpanzee Gestures

Chimpanzees' use of gesture was described in the first detailed field study [1, 2], and natural use of specific gestures has been analyzed [3-5]. However, it was systematic work with captive groups that revealed compelling evidence that chimpanzees use gestures to communicate in a flexible, goal-oriented, and intentional fashion [6-8], replicated across all great ape species in captivity [9-17] and chimpanzees in the wild [18, 19]. All of these aspects overlap with human language but are apparently missing in most animal communication systems, including great ape vocalization, where extensive study has produced meager evidence for intentional use ([20], but see [21, 22]). Findings about great ape gestures spurred interest in a potential common ancestral origin with components of human language [23-25]. Of particular interest, given the relevance to language origins, is the question of what chimpanzees intend their gestures to mean; surprisingly, the matter of what the intentional signals are used to achieve has been largely neglected. Here we present the first systematic study of meaning in chimpanzee gestural communication. Individual gestures have specific meanings, independently of signaler identity, and we provide a partial "lexicon"; flexibility is predominantly in the use of multiple gestures for a specific meaning. We distinguish a range of meanings, from simple requests associated with just a few gestures to broader social negotiation associated with a wider range of gesture types. Access to a range of alternatives may increase communicative subtlety during important social negotiations.

Der Spracherwerb bei Menschenaffen. Sue Savage-Rumbaughs methodologische Wende

Abstract The aim of the paper is to investigate, from the point of view of philosophy of science and philosophy of social science, the turn in the ape language project (ALP) as accomplished in the works of Sue Savage-Rumbaugh and her collaborators. In this project a highly interesting turn from the orientation of research on natural sciences to that on humanities took place. We shall analyze all the relevant works of Savage-Rumbaugh from the point of view of the three central levels of ALP: its scientific, metascientific and methodological levels.

The History of Ape Language Experimentation in Fiction: A Review Essay

The History of Ape Language Experimentation in Fiction: A Review Essay

The role of dialogue in the ontogeny and phylogeny of early symbol combinations: A cross-species comparison of bonobo, chimpanzee, and human learners

What are the evolutionary and developmental origins of linguistic creativity? Cross-species comparison of the clade consisting of bonobo, chimpanzee, and human suggests that creative word combinations arise from conversation. Analysis of conversational data shows that novel symbol combinations are initially dependent upon conversational input – through the processes of deferred imitation and joint construction – for a bonobo and a chimpanzee exposed to a humanly devised symbol system, as well as for a human child. In all three species, reliance on conversational input for novel symbol combinations fades with development, as novel symbol combinations come to be constructed more independently. These findings resolve the controversy between the claim that ape language is limited to imitation and the claim that apes are not capable of imitation. Imitation, like conversational co-construction, does not differentiate between bonobo, chimpanzee, and human; instead, imitation and co-construction differentiate stages of learning and development across all three species.

The gestural repertoire of the wild chimpanzee

Great ape gestural communication is known to be intentional, elaborate and flexible; yet there is controversy over the best interpretation of the system and how gestures are acquired, perhaps because most studies have been made in restricted, captive settings. Here, we report the first systematic analysis of gesture in a population of wild chimpanzees. Over 266days of observation, we recorded 4,397 cases of intentional gesture use in the Sonso community, Budongo, Uganda. We describe 66 distinct gesture types: this estimate appears close to asymptote, and the Sonso repertoire includes most gestures described informally at other sites. Differences in repertoire were noted between individuals and age classes, but in both cases, the measured repertoire size was predicted by the time subjects were observed gesturing. No idiosyncratic usages were found, i.e. no gesture type was used only by one individual. No support was found for the idea that gestures are acquired by 'ontogenetic ritualization' from originally effective actions; moreover, in detailed analyses of two gestures, action elements composing the gestures did not closely match those of the presumed original actions. Rather, chimpanzee gestures are species-typical; indeed, many are 'family-typical', because gesture types recorded in gorillas, orangutans and chimpanzee overlap extensively, with 24 gestures recorded in all three genera. Nevertheless, chimpanzee gestures are used flexibly across a range of contexts and show clear adjustment to audience (e.g. silent gestures for attentive targets, contact gestures for inattentive ones). Such highly intentional use of a species-typical repertoire raises intriguing questions for the evolution of advanced communication.

Some other kind of being: Human nature and animal subjects in ape language research

When asked to describe herself, Koko the nonhuman primate replied in sign-language that she was indeed a ‘fine animal gorilla’. One of several nonhuman primates that have been undergoing language training since the 1970s, Koko’s ability to grasp the fundaments of human expression have caused both fascination and derision in popular and scientific cultures. Yet visions of the language-using ape have not been simply a phenomenon of the twentieth and twenty-first centuries. Early natural history and Enlightenment philosophy make curious reference to the possibility of communicating apes. So similar to the human and yet existing in the terrain of animality, it was believed by some that the ape held a latent capacity for perfectibility — for emerging out of the mute world of the animal into the terrain of the human. An historically liminal entity, the great ape has been cast in both scientific literature and popular culture in various ways as a ‘pre-human’, a species that may be capable of becoming, through a training in the civilized manners and language of the world, fully human. In this sense, striking similarities can be found between the representation of nonhuman primates in contemporary ape language projects and historical discourses linking human childhood with a state of animality.