In June 2010, Rosie, a descendant of the chimpanzees sent into space, and thirteen others were shipped from New Mexico to a laboratory in Texas for possible use in hepatitis research. They were to be the first group of approximately two hundred chimpanzees to be reintroduced to invasive research. These chimpanzees had been in semiretirement for a decade after being removed from an enormous laboratory that was in egregious violation of the Animal Welfare Act. I, along with many (...) bioethicists, scientists, primatologists, and others, have long been arguing against the use of chimpanzees in invasive research on ethical grounds. The United States is now poised to join the rest of the world in ending invasive research on our closest primate relatives. (shrink)

Using an approach developed in the context of human bioethics, we argue that chimpanzees in research can be regarded as vulnerable subjects. This vulnerability is primarily due to communication barriers and situational factors—confinement and dependency—that make chimpanzees particularly susceptible to risks of harm and exploitation in experimental settings. In human research, individuals who are deemed vulnerable are accorded special protections. Using conceptual and moral resources developed in the context of research with vulnerable humans, we show how chimpanzees (...) warrant additional safeguards against harm and exploitation paralleling those for human subjects. These safeguards should include empowering third parties to act as surrogate decision makers for chimpanzees, ensuring participant “assent,” and avoiding recruitment of animal subjects based merely on convenience. (shrink)

Among the "hard cases" of captive animal research is the continued use of chimpanzees in harmful experimental science. In a recent article I contend that contemporary animal welfare science and chimpanzee behavioral studies permit, if not require, a reappraisal of the moral significance of chimpanzee dissent from participation in certain experiments. In what follows, I outline my earlier argument, provide a brief survey of some central concepts in pediatric research ethics, and use these to enrich an (...) understanding of chimpanzee dissent useful for research ethics. (shrink)

Behavioral science research in American universities was promoted and influenced by philanthropic foundations. In the 1920s and 1930s, Rockefeller philanthropies in particular financed behavioral science research projects that promised to fulfill their mandates to `improve mankind', mandates that foundation officers transformed into an informal, loosely defined human engineering effort. Controlling behavior, especially sexual and social `dysfunction', was a major priority. The behavioral scientists at Yale University, led by president James R. Angell and `psychobiologist' Robert M. Yerkes, tapped into (...) foundation largesse by crafting research programs that promised to contribute to the `welfare of mankind' through the investigation and control of sexual and social behavior. Foundation officers supported Yerkes' primate research because they accepted his premise that analyzing chimpanzee sexual behavior would yield valuable insights into the evolutionary underpinnings of human development and would thus give investigators the necessary information to ameliorate dysfunction. Between 1925 and 1940, philanthropic foundations contributed approximately $7 million to support the Yale Institute of Human Relations and the affiliated Yerkes Laboratories of Primate Biology. Yet, disappointment with the results of the Yale appropriations ultimately contributed to foundation officers turning away from behavioral sciences and toward biological sciences as they continued their efforts to improve mankind through human engineering. This article examines the interaction between foundation officers and Yale behavioral scientists to illustrate how scientific entrepreneurs successfully crafted rationales about human sexuality to solicit funds, how philanthropic foundation officers became enmeshed in the behavioral science research projects that they funded, and how a cooperative human engineering effort at Yale developed in the 1920s and unraveled in the 1930s. (shrink)

The Institute of Medicine (IOM) Committee on the Necessity of the Use of Chimpanzees in Biomedical and Behavioral Research made a series of recommendations that, as of an announcement on June 26, 2013, the National Institutes of Health (NIH) is turning into implemented guidelines. Many advocates, including some researchers and scholars, have suggested that the Committee’s recommendations could be applied successfully to other animal species. This article examines, from my perspective as the IOM Committee’s chair, some of the most (...) important features of the Committee’s work, addresses whether chimpanzees represent a special or unique case for the purpose of research policy, and suggests an approach for evaluating the applicability of the Committee’s recommendations for other animal species used in research. I first present my perspective on the features of the Committee’s work that influenced its approach and conclusions. I then argue that despite the fact that chimpanzees represent a somewhat unique case for restricted research use, their case still offers important lessons for policy regarding the use of other species. Finally, I offer some observations regarding the recommendations and implications of the report from the NIH Working Group charged with crafting guidelines for implementing the IOM Committee’s recommendations. (shrink)

Literature on the mental capacities and cognitive mechanisms of the great apes has been silent about whether they can act autonomously. This paper provides a philosophical theory of autonomy supported by psychological studies of the cognitive mechanisms that underlie chimpanzee behavior to argue that chimpanzees can act autonomously even though their psychological mechanisms differ from those of humans. Chimpanzees satisfy the two basic conditions of autonomy: (1) liberty (the absence of controlling influences) and (2) agency (self-initiated intentional action), each (...) of which is specified here in terms of conditions of understanding, intention, and self-control. In this account, chimpanzees make knowledge-based choices reflecting a richly information-based and socially sophisticated understanding of the world. Finally, two major theories of autonomy (Kantian theory and two-level theory) are rejected as too narrow to adequately address these issues, necessitating the modifications made in the present approach. (shrink)

In December 2013, the Nonhuman Rights Project (NhRP) filed a petition for a common law writ of habeas corpus in the New York State Supreme Court on behalf of Tommy, a chimpanzee living alone in a cage in a shed in rural New York (Barlow, 2017). Under animal welfare laws, Tommy’s owners, the Laverys, were doing nothing illegal by keeping him in those conditions. Nonetheless, the NhRP argued that given the cognitive, social, and emotional capacities of chimpanzees, Tommy’s confinement (...) constituted a profound wrong that demanded remedy by the courts. Soon thereafter, the NhRP filed habeas corpus petitions on behalf of Kiko, another chimpanzee housed alone in Niagara Falls, and Hercules and Leo, two chimpanzees held in research facilities at Stony Brook University. Thus began the legal struggle to move these chimpanzees from captivity to a sanctuary, an effort that has led the NhRP to argue in multiple courts before multiple judges. The central point of contention has been whether Tommy, Kiko, Hercules, and Leo have legal rights. To date, no judge has been willing to issue a writ of habeas corpus on their behalf. Such a ruling would mean that these chimpanzees have rights that confinement might violate. Instead, the judges have argued that chimpanzees cannot be bearers of legal rights because they are not, and cannot be persons. In this book we argue that chimpanzees are persons because they are autonomous. (shrink)

We argue that the recommendations made by the Institute of Medicine’s 2011 report, Chimpanzees in Biomedical and Behavioral Research : Assessing the Necessity, are methodologically and ethically confused. We argue that a proper understanding of evolution and complexity theory in terms of the science and ethics of using chimpanzees in biomedical research would have had led the committee to recommend not merely limiting but eliminating the use of chimpanzees in biomedical research. Specifically, we argue that a proper (...) understanding of the difference between the gross level of examination of species and examinations on finer levels can shed light on important methodological and ethical inconsistencies leading to ignorance of potentially unethical practices and policies regarding the use of animals in scientific research. (shrink)

There is a persistent methodological problem in primate mindreading research, dubbed the 'logical problem,' over how to determine experimentally whether chimpanzees are mindreaders or just clever behavior-readers of a certain sort. The problem has persisted long enough that some researchers have concluded that it is intractable. The logical problem, I argue, is tractable but only with experimental protocols that are fundamentally different from those that have been currently used or suggested. In the first section, I describe what the logical (...) problem is and how it can, in principle, be solved. In the second section, I illustrate how a well-known experimental protocol by Hare et al. fails to solve the logical problem. In the third section, I do the same for a protocol by Heyes . .) In the fourth section, I describe a novel experimental protocol for visual perspective-taking and argue that it succeeds to discriminate between the relevant mindreading and behavior-reading hypotheses. In addition, this new experimental protocol employs procedures that are realistic enough to suppose that chimpanzees might very well succeed in passing them. (shrink)

On December 15, 2011, a final report was issued by the Committee on the Use of Chimpanzees in Biomedical and Behavioral Research, which had been convened by the U. S. Institute of Medicine (IOM) in collaboration with National Research Council (NRC) of the National Academies. Within a month of its release, this report was designated by Wired Science one of the “top scientific discoveries of 2011” (Wired Science Staff 2011). The ad hoc Committee responsible for this report was (...) formed at the request of the National Institutes of Health (NIH) in response to congressional inquiry that had been prompted by expressions of public concern.1 The issues addressed in the report are profoundly ethical, despite NIH’s .. (shrink)

I had the privilege of chairing the Institute of Medicine Committee on the Necessity of Chimpanzees in Biomedical and Behavioral Research in 2011, an effort that has lessons not only about the questions presented to it, but also about the policy and practice of the use of chimpanzees in research and about animal research policy in general. In this essay I will assess the impact and implications of the committee's work and at the same time clarify what (...) I see as its limits. All in all, I believe it is fair to say that the committee's recommendations and the process of its work represent a success for bioethics‐related consensus committees. The combination of topic, timing, and public stakeholder sentiment may have aligned in unique ways that contributed to that success. But even if it turns out to be a special case of sorts, there are lessons to be learned for the future. (shrink)

The question of whether chimpanzees, like humans, reason about unobservable mental states remains highly controversial. On one account, chimpanzees are seen as possessing a psychological system for social cognition that represents and reasons about behaviors alone. A competing account allows that the chimpanzee's social cognition system additionally construes the behaviors it represents in terms of mental states. Because the range of behaviors that each of the two systems can generate is not currently known, and because the latter system depends (...) upon the former, determining the presence of this latter system in chimpanzees is a far more difficult task than has been assumed. We call for recognition of this problem, and a shift from experimental paradigms that cannot resolve this question, to ones that might allow researchers to intelligently determine when it is necessary to postulate the presence of a system which reasons about both behavior and mental states. (shrink)

The advanced sensory, psychological and social abilities of chimpanzees confer upon them a profound ability to suffer when born into unnatural captive environments, or captured from the wild – as many older research chimpanzees once were – and when subsequently subjected to confinement, social disruption, and involuntary participation in potentially harmful biomedical research. Justifications for such research depend primarily on the important contributions advocates claim it has made toward medical advancements. However, a recent large-scale systematic review indicates (...) that invasive chimpanzee experiments rarely provide benefits in excess of their profound animal welfare, bioethical and financial costs. The approval of large numbers of these experiments – particularly within the US – therefore indicates a failure of the ethics committee system. By 2008, legislative or policy bans or restrictions on invasive great ape experimentation existed in seven European countries, Japan, Australia and New Zealand. In continuing to conduct such experiments on chimpanzees and other great apes, the US was almost completely isolated internationally. In 2007, however, the US National Institutes of Health National Center for Research Resources implemented a permanent funding moratorium on chimpanzee breeding, which is expected to result in a major decline in laboratory chimpanzee numbers over the next 30 years, as most are retired or die. Additionally, in 2008, The Great Ape Protection Act was introduced to Congress. The bill proposed to end invasive research and testing on an estimated 1,200 chimpanzees confined within US laboratories, and, for approximately 600 federally-owned, to ensure their permanent retirement to sanctuaries. These events have created an unprecedented opportunity for US legislators, researchers, and others, to consider a global ban on invasive chimpanzee research. Such a ban would not only uphold the best interests of chimpanzees, and other research fields presently deprived of funding, but would also increase the compliance of US animal researchers with internationally-accepted animal welfare and bioethical standards. It could even result in the first global moratorium on invasive research, for any non-human species, unless conducted in the best interests of the individual or species. (shrink)

Chimpanzees and humans are close evolutionary relatives who behave in many of the same ways based on a similar type of agentive organization. To what degree do they experience the world in similar ways as well? Using contemporary research in evolutionarily biology and animal cognition, I explicitly compare the kinds of experience the two species of capable of having. I conclude that chimpanzees’ experience of the world, their experiential niche as I call it, is: intentional in basically the same (...) way as humans’; rational in the sense that it is self-critical and operates with logically structured causal and intentional inferences; but not normative at all in that it does not operate with “objective” evaluative standards. Scientific data do not answer philosophical questions, but they provide rich raw material for scientists and philosophers alike to reflect on and clarify fundamental psychological concepts. (shrink)

The parsimonious consideration of research into food sharing among chimpanzees suggests that the type of social regulation found among our closest genetic relatives can best be understood as a form of morality. Morality is here defined from a naturalistic perspective as a system in which self-aware individuals interact through socially prescribed, psychologically realistic rules of conduct which provide these individuals with an awareness of how one ought to behave. The empirical markers of morality within chimpanzee communities and the (...) traditional moral traits to which they correspond are (1) self-awareness/agency; (2) calculated reciprocity/obligation; (3) moralistic aggression/blame; and (4) consolation/empathy. (shrink)

Since 1985, the US Animal Welfare Act and Public Health Service policy have required that researchers using nonhuman primates in biomedical and behavioral research develop a plan “for a physical environment adequate to promote the psychological well-being of primates.” In pursuing this charge, housing attributes such as social companionship, opportunities to express species-typical behavior, suitable space for expanded locomotor activity, and nonstressful relationships with laboratory personnel are dimensions that have dominated the discussion. Regulators were careful not to direct a (...) specific set of prescriptions (i.e., engineering standards) for the attainment of these goals, but to leave the design of the programs substantially up to “professional judgment” at the local level. Recently, however, the Institute of Medicine, in its path-finding 2011 report on the necessity of chimpanzee use in research, bypassed this flexible and contingent concept, and instead, required as a central precondition that chimpanzees be housed in “ethologically appropriate” environments. In so doing, obligations of ethical treatment of one great ape species were elevated above the needs of some research. The evolution and significance of this change are discussed. (shrink)

From an early age, humans know a surprising amount about basic physical principles, such as gravity, force, mass, and shape. We can see this in the way that young children play, and manipulate objects around them. The same behaviour has long been observed in primates - chimpanzees have been shown to possess a remarkable ability to make and use simple tools. But what does this tell us about their inner mental state - do they therefore share the same understanding to (...) that of a young child? Do they understand the simple, underlying physical principles involved? Though some people would say that they do, this book reports groundbreaking research that questions whether this really is the case. -/- Folk Physics for Apes challenges the assumptions so often made about apes. It offers us a rare glimpse into the workings of another mind, examining how apes perceive and understand the physical world - an understanding that appears to be both similar to, and yet profoundly different from our own. The book will have broad appeal to evolutionary psychologists, developmental psychologists, and those interested in the sub-disciplines of cognitive science (philosophy, anthropology). The book additionally offers for developmental psychologists some valuable new non-verbal techniques for assessing causal understanding in young children. (shrink)

Should monkeys be used in painful and often deadly infectious disease research that may save many human lives? This is the challenging question that Anne Barnhill, Steven Joffe, and Franklin G. Miller take on in their carefully argued and compelling article “The Ethics of Infection Challenges in Primates.” The authors offer a nuanced and even-handed position that takes philosophical worries about nonhuman primate moral status seriously and still appreciates the very real value of such research for human welfare. (...) Overall, they argue for an extension and revision of the recommendations regarding chimpanzee research offered by the Institute of Medicine in 2011; the practical upshot of their argument would allow for infection challenge research for promising interventions for Ebola and Marburg virus diseases but not for smallpox or the common cold. The IOM recommendations regarding chimpanzee research put in motion an exceptionalist policy for this great ape population. Barnhill and colleagues’ proposal would enlarge the scope of that exceptionalism to embrace NHPs other than great apes. But is such exceptionalism warranted? It is not obvious to me either that the more sophisticated capacities of a species as a whole give it greater ethical protections or that less intellectually or socially sophisticated animals ought to therefore receive less protection when it comes to painful experimental interventions. (shrink)

In philosophy the term intentionality refers to the feature possessed by mental states of beingabout things others than themselves. A serious question has been how to explain the intentionality of mental states. This paper starts with linguistic representations, and explores how an organism might use linguistic symbols to represent other things. Two research projects of Sue Savage-Rumbaugh, one explicity teaching twopan troglodytes to use lexigrams intentionally, and the other exploring the ability of several members ofpan paniscus to learn lexigram (...) use and comprehension of English speech spontaneously when raised in an appropriate environment, are examined to explore the acquisition process. Although it is controversial whether intentionality of mental states or linguistic symbols is primary, it is argued that the intentionality of linguistic symbols is primary and that studying how organisms learn to use linguistic symbols provides an avenue to understanding how intentionality is acquired by cognitive systems. (shrink)

This paper develops the hypothesis that languages may be learned by means of a kind of cause-effect analysis. This hypothesis is developed through an examination of E. Sue Savage-Rumbaugh's research on the abilities of chimpanzees to learn to use symbols. Savage-Rumbaugh herself tends to conceive of her work as aiming to demonstrate that chimpanzees are able to learn the "referential function" of symbols. Thus the paper begins with a critique of this way of viewing the chimpanzee's achievements. The (...) hypothesis that Savage-Rumbaugh's chimpanzees learn to use symbols by means of cause-effect analysis is then supported through a detailed examination of the tasks they have learned to perform. Next, it is explained how language-learning in humans might be conceptualized along similar lines. The final section attempts to explain how the pertinent cause-effect analysis ought to be conceived. (This paper was published with a reply by Savage-Rumbaugh. See the same issue, pp. 55-76.). (shrink)

Knowledge of the context and development of playful expressions in chimpanzees is limited because research has tended to focus on social play, on older subjects, and on the communicative signaling function of expressions. Here we explore the rate of playful facial and body expressions in solitary and social play, changes from 12- to 15-months of age, and the extent to which social partners match expressions, which may illuminate a route through which context influences expression. Naturalistic observations of seven (...) class='Hi'>chimpanzee infants ( Pan troglodytes ) were conducted at Chester Zoo, UK ( n = 4), and Primate Research Institute, Japan ( n = 3), and at two ages, 12 months and 15 months. No group or age differences were found in the rate of infant playful expressions. However, modalities of playful expression varied with type of play: in social play, the rate of play faces was high, whereas in solitary play, the rate of body expressions was high. Among the most frequent types of play, mild contact social play had the highest rates of play faces and multi-modal expressions (often play faces with hitting). Social partners matched both infant play faces and infant body expressions, but play faces were matched at a significantly higher rate that increased with age. Matched expression rates were highest when playing with peers despite infant expressiveness being highest when playing with older chimpanzees. Given that playful expressions emerge early in life and continue to occur in solitary contexts through the second year of life, we suggest that the play face and certain body behaviors are emotional expressions of joy, and that such expressions develop additional social functions through interactions with peers and older social partners. (shrink)

This paper describes, analyzes, and critiques the construction of separate “male” and “female” genomes in current human genome research. Comparative genomic work on human sex differences conceives of the sexes as like different species, with different genomes. I argue that this construct is empirically unsound, distortive to research, and ethically questionable. I propose a conceptual model of biological sex that clarifies the distinction between species and sexes as genetic classes. The dynamic interdependence of the sexes makes them “dyadic (...) kinds” that are not like species, which are “individual kinds.” The concept of sex as a “dyadic kind” may be fruitful as a remedy to the tendency to conceive of the sexes as distinct, binary classes in biological research on sex more generally. (shrink)

Honest signalling theory suggests that humans and chimpanzees can extract socially relevant information relating to personality from the faces of their conspecifics. Humans are also able to extract information from chimpanzees’ faces. Here, we examine whether personality characteristics of chimpanzees, including measures of psychopathy, can be discerned based purely on facial morphology in photographs. Twenty-one chimpanzees were given naïve and expert personality ratings on the Ten Item Personality Inventory (TIPI) and the Chimpanzee Triarchic Model of Psychopathy (CHMP-Tri) before and (...) following behavioural observations. Characteristics relating to openness, conscientiousness, extraversion, and disinhibition could be distinguished from the faces of chimpanzees. Individuals higher on disinhibition have lower scores on conscientiousness and emotional stability and higher scores on extraversion, while those higher on meanness have lower conscientiousness and agreeableness. Facial expressions are linked to personality traits present in the TIPI and CHMP-Tri models: the Relaxed Face and the Grooming Face were displayed more by chimpanzees higher on agreeableness, whereas the Compressed Lips Face was observed more in those individuals higher on boldness, and the Full Open Grin was displayed more by chimpanzees higher on extraversion but lower on emotional stability and conscientiousness. Facial expressions were also found to be associated with particular behavioural contexts, namely the Grooming Face in affiliative contexts and the Relaxed and Relaxed Open Mouth Faces in neutral contexts. Dominant chimpanzees display higher levels of boldness and more Compressed Lips Faces, Relaxed Open Mouth Faces, and Grooming Faces than subordinate individuals. These findings support and extend evidence for an honest signalling system and a personality structure shared between humans and chimpanzees. Future research could further explore how personality is conveyed through the face, perhaps through more than just singular aspects of character, and maybe reflecting what chimpanzees themselves are able to do. (shrink)

Purpose: Yerkish is an artificial language created in 1971 for the specific purpose of exploring the linguistic potential of nonhuman primates. The aim of this paper is to remind the research community of some important issues and concepts related to Yerkish that seem to have been forgotten or appear to be distorted. These are, particularly, its success, its promising aspects for future research and last but not least that it was Ernst von Glasersfeld who invented Yerkish: he coined (...) the term “lexigrams,” created the first 120 of them and designed the grammar that regulated their combination. Design: The first part of this paper begins with a short outline of the context in which the Yerkish language originated: the original LANA project. It continues by presenting the language itself in more detail: first, its design, focusing on its “lexigrams” and its “correlational” grammar, and then its use by the chimpanzee Lana in formulating sentences. The second part gives a brief introduction to the foundation of Yerkish in Silvio Ceccato’s Operational Methodology, particularly his idea of the correlational structure of thought and concludes with the main insights that can be derived from the Yerkish experiment seen in the light of Operational Methodology. Findings: Lana’s success in language learning and the success of Yerkish during the past decades are probably due to the characteristics of Yerkish, particularly its foundation in operational methodology. The operation of correlation could be what constitutes thinking in a chimpanzee and an attentional system could be what delivers the mental content that correlation assembles into triads and networks. Research implications: Since no other assessment or explanation of Lana’s performances has considered these foundational issues, a new research project or program should validate the above-mentioned hypotheses, particularly the correlational structure of chimpanzee thinking. (shrink)

In the wake of the chimpanzee genome publication, Pascal Gagneux, James J. Moore and Ajit Varki consider the ethical and scientific challenges for scientists who work on captive great apes.

A common assumption in the selection of nonhuman animal subjects for research and the approval of research is that, if the risks of a procedure are too great for humans, and if there is a so-called scientific necessity, then it is permissible to use nonhuman animal subjects. I reject the common assumption as neglecting the central ethical issue of the permissibility of using nonhuman animal subjects and as being inconsistent with the principle of justice used in human subjects (...) research ethics. This principle requires that certain classes of individuals not be subjected to a disproportionate share of the burdens or risks of research. I argue for an extension of this principle to nonhuman animal research and show that a prima facie violation of the principle occurs because nonhuman animals bear an overwhelmingly disproportionate share of the risks of research without sufficient justification or reciprocal benefit. (shrink)

The paper gives an overview of primate research and the economic-ethical 'lessons' we can derive from it. In particular, it examines the complex, multi-faceted and partially conflicting nature of (non-) human primates. Our closest living relatives, the chimpanzees and bonobos, apparently walk on two legs: a selfish and a groupish leg. Given evolutionary continuity and gradualism between monkeys, apes and humans, human primates seem to be bipolar apes as well. They, too, tend to display a dual structure: there seems (...) to be a pro-social and a self-interested side to our species and a bipolar tension seems to exist between competition and cooperation respectively between self-interest and the common good. We are apparently at the same time Homines oeconomici and Homines culturali. Our inner ape tries to combine self-interested and common good motives. Based on de Waal's Russian doll model, the essay investigates the evolutionary origins of morality and 'eusociality'. With the help of selected case studies stemming from behavioural sciences/economics, the paper illustrates examples of empathy, altruism, reciprocal fairness, pro-social and other-regarding preferences, inequity aversion and altruistic punishment in (non-)human primates. Beside this selfless and groupish side, the paper also reflects on the self-interest and egoistic nature of (non-)human primates and the behavioural and cognitive differences between monkeys, apes and humans. (shrink)

The potential for genetic engineering of enhancements to complex human traits has been the subject of vigorous debate for a number of years. Most of the discussion has centered on the possible moral consequences of pursuing enhancements, especially those that might affect complex behaviours and components of personality. Little has been written on the actual process of implementing this technology. This paper presents a ‘thought experiment’ about the likely form of final preclinical testing for a technology to enhance intelligence as (...) a prototypical multiplex trait. The significance and the potential dangers of implementing enhancements in humans, especially to highly valued traits such as intelligence, would mandate a thorough programme of testing in animals, including non-human primates such as chimpanzees. The implications this would have for researchers, society and, most importantly, the animals themselves are discussed, and the paper concludes with a suggestion for a morally justifiable approach to resolve the tragic question of what to do with research animals who have a cognitive capacity that is close to that of humans. (shrink)

Some philosophers (e.g. Descartes) argue that there is an evidential relationship between language and thought, such that presence of language is indicative of mind. Recent language acquisition research with apes such as chimpanzees and bonobos attempts to demonstrate the capacity of these primates to acquire at least rudimentary linguistic capacity. This paper presents a case study of the ape language research and explores the consequences of the research with respect to the argument that animals lack mind because (...) they fail to display linguistic capacity. (shrink)

We present a new road map for research on “How the Brain Got Language” that adopts an EvoDevoSocio perspective and highlights comparative neuroprimatology – the comparative study of brain, behavior and communication in extant monkeys and great apes – as providing a key grounding for hypotheses on the last common ancestor of humans and monkeys and chimpanzees and the processes which guided the evolution LCA-m → LCA-c → protohumans → H. sapiens. Such research constrains and is constrained by (...) analysis of the subsequent, primarily cultural, evolution of H. sapiens which yielded cultures involving the rich use of language. (shrink)

Seven chimpanzees in twenty-seven experiments run over the course of five years at his University of Louisiana laboratory in New Iberia, Louisiana, are at the heart of Daniel Povinelli’s case that chimpanzee thinking about the physical world is not at all like that of humans. Chimps, according to Povinelli and his coauthors James Reaux, Laura Theall, and Steve Giambrone, are phenomenally quick at learning to associate visible features of tools with specific uses of those tools, but they appear to (...) lack cognitive access to forces and other invisible causal features of those tools. Povinelli’s chimps appar- ently rely on a trial-and-error strategy to learn whether a particular tool is suitable for a particular task, and and having mastered one task they appear unable to generalize to other tasks on the basis of tool properties that are not directly visible. Thus, for instance, Povinelli’s research subjects did not immediately recognize that a tool that had been demonstrated to be non- rigid would be unsuitable for dragging a piece of food towards them. When presented with a choice between a rigid, T-shaped “rake” that they had used many times previously and a rake with non-rigid arms, Povinelli and Reaux found, over the course of eight trials, that their chimps chose the non-rigid rake as frequently as they chose the rigid one (experiment 9, chapter 7). (shrink)

The study of reciprocal altruism, or the exchange of goods and services between individuals, requires attention to both evolutionary explanations and proximate mechanisms. Evolutionary explanations have been debated at length, but far less is known about the proximate mechanisms of reciprocity. Our own research has focused on the immediate causes and contingencies underlying services such as food sharing, grooming, and cooperation in brown capuchin monkeys and chimpanzees. Employing both observational and experimental techniques, we have come to distinguish three types (...) of reciprocity. Symmetry-based reciprocity is cognitively the least complex form, based on symmetries inherent in dyadic relationships (e.g., mutual association, kinship). Attitudinal reciprocity, which is more cognitively complex, is based on the mirroring of social attitudes between partners and is exhibited by both capuchin monkeys and chimpanzees. Finally, calculated reciprocity, the most cognitively advanced form, is based on mental scorekeeping and is found only in humans and possibly chimpanzees. (shrink)

I suggest a pluralistic account of folk psychology according to which not all predictions or explanations rely on the attribution of mental states, and not all intentional actions are explained by mental states. This view of folk psychology is supported by research in developmental and social psychology. It is well known that people use personality traits to predict behavior. I argue that trait attribution is not shorthand for mental state attributions, since traits are not identical to beliefs or desires, (...) and an understanding of belief or desire is not necessary for using trait attributions. In addition, we sometimes predict and explain behavior through appeal to personality traits that the target wouldn't endorse, and so could not serve as the target's reasons. I conclude by suggesting that our folk psychology includes the notion that some behavior is explained by personality traits—who the person is—rather than by beliefs and desires—what the person thinks. Consequences of this view for the debate between simulation theory and theory theory, as well as the debate on chimpanzee theory of mind are discussed. (shrink)

Michael Tomasello’s account of moral evolution includes both a synthesis of extensive experimental work done on humans and chimpanzees on their potential for perspective-taking and helpful, altruistic generosity and a major emphasis on “collective intentionality” as an important component of morality in humans. Both will be very useful to the evolutionary study of this subject. However, his disavowal of collective intentions on the parts of chimpanzees would appear to be empirically incorrect, owing to reliance on experimental captive research focused (...) only on dyadic interactions. Here, evidence to the contrary is provided from studies of wild chimpanzees as they naturally cooperate in sizable groups. Collective intentions are inferable when they go on patrol, when they mob predators, when they go hunting, and when large coalitions gang-attack disliked members of the same community. This last behavior has particularly significant pre-adaptive implications for the evolution of moralistic social control, and it suggests that moral evolution has deep roots, going back to the Last Common Ancestor of humans, bonobos, and chimpanzees. (shrink)

Research on the evolution of language is often framed in terms of sharp discontinuities in syntax and semantics between animal communication systems and human language as we know them. According to the so-called “pragmatics-first” approach to the evolution of language, when trying to understand the origins of human language in animal communication, we should be focusing on potential pragmatic continuities. However, some proponents of this approach (e.g. Seyfarth and Cheney Animal Behavior 124: 339–346, 2017) find important pragmatic continuities, whereas (...) others (e.g. Origgi and Sperber 2000) find sharp discontinuities. I begin (in Section 1) by arguing that this divergence is due to the fact that the proponents implicitly rely, respectively, on two different views of pragmatics, corresponding to different conceptions of what is involved in context-dependence – one “Carnapian”, the other “Gricean”. I argue that neither conception is fit to serve the purposes of pragmatics-first approaches to the evolution of language. In Section 2, I examine a recent formal “semantic-pragmatic” analysis of monkey calls, due to Philippe Schlenker et al. (in, e.g., Linguistics and Philosophy 37 (6): 439–501, 2014, Trends in Cognitive Science 20 (12): 894–904, 2016a, Theoretical Linguistics 42 (1–2): 1–90, 2016b), which appears to improve on the Carnapian and Gricean conceptions. However, I argue that the appearances are misleading and that the S-P analysis is no better suited than Carnapian analyses for the purposes of those seeking to establish human-nonhuman pragmatic continuities. Understanding why this is so will point the way toward my preferred, genuinely intermediate conception of pragmatics (as defended in Bar-On Biology & Philosophy 36 (6): 1–25, 2021), which – I argue in Section 3 – is better fit for these purposes. Drawing on recent discussions of chimpanzee communication, I briefly indicate which aspects of extant primate call communication – both gestural and vocal – could potentially count as pragmatic according to this conception. (shrink)

This is a book about the bond between sentient beings. It explores the non-verbal space between two entities, and asks questions like; What is a healthy human being? Is it nature? Nurture? Nature via nurture? How are we born with personality traits, emotion, mood, language abilities, and intelligence? What do we know about attachment, family structure and genetic inheritance? Robert Ingersoll and Dr Anna Scarnà use the life history of the chimpanzee, Nim Chimpsky and his family: parents Carolyn and (...) Pan, companion Lilly, their daughter, Sheba, and an assortment of human carers, to explain the hallmarks of healthy human psychological development. What makes humans 'human', and chimpanzees, 'chimpanzees'? Do chimpanzees have a personality, or should we consider them to have a "chimpanality?" Robert, close friend and carer of Nim, gives the facts about Nim's upbringing and first degree relatives, and Anna reports with reference to theories of brain, personality, self, and language. Together they explain what can be drawn from psychological research and reanalyse the chimpanzee work from the 1960s and 1970s in order to honour and respect the memory of those animals. (shrink)

As the usual regulatory framework did not fit well during the last Ebola outbreak, innovative thinking still needed. In the absence of an outbreak, randomised controlled trials of clinical efficacy in humans cannot be done, while during an outbreak such trials will continue to face significant practical, philosophical, and ethical challenges. This article argues that researchers should also test the safety and effectiveness of novel vaccines in wild apes by employing a pluralistic approach to evidence. There are three reasons to (...) test vaccines in wild populations of apes: i) protect apes; ii) reduce Ebola transmission from wild animals to humans; and iii) accelerate vaccine development and licensing for humans. Data obtained from studies of vaccines among wild apes and chimpanzees may even be considered sufficient for licensing new vaccines for humans. This strategy will serve to benefit both wild apes and humans. (shrink)

In the midst of the recent Ebola outbreak, scientific developments involving infection challenge experiments on nonhuman primates (NHPs) sparked hope that successful treatments and vaccines may soon become available. Yet these studies pose a stark ethical quandary. On the one hand, they represent an important step in developing novel therapies and vaccines for Ebola and the Marburg virus, with the potential to save thousands of human lives and to protect whole communities from devastation; on the other hand, they intentionally expose (...) sophisticated animals to severe suffering and a high risk of death. Other studies that infect NHPs with a lethal disease in order to test interventions that may prove beneficial for humans pose the same ethical difficulty. Some advocates have argued that all research on primates should be phased out, and ethicists have questioned whether a moral justification of primate research is possible. A 2010 European Union directive banned virtually all research on great apes, and 2013 guidelines from the National Institutes of Health (NIH), based upon recommendations in an influential 2011 Institute of Medicine (IOM) report, eliminated most biomedical research with chimpanzees in the United States. But studies involving other NHPs face no comparable restrictions.Should research on NHPs other than great apes be subject to tighter restrictions than it currently is? In this article, we explore this general question in the context of one particular type of biomedical research: infection challenge studies. We advocate a presumptive prohibition on infection challenge experiments in NHPs, but we also argue that exceptions to this prohibition are permissible, subject to strict substantive and procedural safeguards, when necessary to avert substantial loss of human life or severe morbidity for a substantial number of people. (shrink)

If you put chimpanzees from different communities together you can expect mayhem - they are not keen on treating each other nicely. There is closely related species of apes, however, whose members have countless encounters with unrelated specimen on a daily basis and yet almost all get through the day in one piece - that species is us, homo sapiens. But what makes us get along, most of the time? Morality as such is, perhaps surprisingly, not a mainstream research (...) topic in social psychology. Most textbooks in the field do not even mention the term morality at all (and focus on 'prosociality' instead). This relative lack of 'coverage' might have to do with the difficulty of operationalising 'morality' in a fitting way (more on this below). However, morality certainly is a social phenomenon and therefore the collection of Fargas, Jussim, and Van Lange is certainly a step in the right direction; it offers an extensive overview of the field and is suggestive of the vast potential of studying morality through the lens of social psychology. (shrink)

Abstract Christopher Gauker has argued that a cause?effect analysis of the acquisition of communication skills in chimpanzees is adequate to describe the data reported in our work at the Language Research Center. I agree that the cause?effect approach to language function is the only viable method of analyzing language. Language must be studied as a process that functions to organize behavior between two or more individuals. However, the problem of language understanding is not addressed satisfactorily by the perspective offered (...) by Gauker. Some more recent work, particularly with the pygmy chimpanzee ?Kanzi?, is now beginning to explicate a cause?effect analysis of language comprehension. It is argued that in the young chimpanzee, as with children, language comprehension is the driving force underlying the language acquisition process. It is further argued that the transition from comprehension to production is made possible by the capacity for goal?directed observational imitation. (shrink)

A leading cognitive scientist argues that a deep sense of good and evil is bred in the bone. From John Locke to Sigmund Freud, philosophers and psychologists have long believed that we begin life as blank moral slates. Many of us take for granted that babies are born selfish and that it is the role of society—and especially parents—to transform them from little sociopaths into civilized beings. In Just Babies, Paul Bloom argues that humans are in fact hardwired with a (...) sense of morality. Drawing on groundbreaking research at Yale, Bloom demonstrates that, even before they can speak or walk, babies judge the goodness and badness of others’ actions; feel empathy and compassion; act to soothe those in distress; and have a rudimentary sense of justice. -/- Still, this innate morality is limited, sometimes tragically. We are naturally hostile to strangers, prone to parochialism and bigotry. Bringing together insights from psychology, behavioral economics, evolutionary biology, and philosophy, Bloom explores how we have come to surpass these limitations. Along the way, he examines the morality of chimpanzees, violent psychopaths, religious extremists, and Ivy League professors, and explores our often puzzling moral feelings about sex, politics, religion, and race. In his analysis of the morality of children and adults, Bloom rejects the fashionable view that our moral decisions are driven mainly by gut feelings and unconscious biases. Just as reason has driven our great scientific discoveries, he argues, it is reason and deliberation that makes possible our moral discoveries, such as the wrongness of slavery. Ultimately, it is through our imagination, our compassion, and our uniquely human capacity for rational thought that we can transcend the primitive sense of morality we were born with, becoming more than just babies. -/- Paul Bloom has a gift for bringing abstract ideas to life, moving seamlessly from Darwin, Herodotus, and Adam Smith to The Princess Bride, Hannibal Lecter, and Louis C.K. Vivid, witty, and intellectually probing, Just Babies offers a radical new perspective on our moral lives. (shrink)

The study of animal cognition raises profound questions about the minds of animals and philosophy of mind itself. Aristotle argued that humans are the only animal to laugh, but in recent experiments rats have also been shown to laugh. In other experiments, dogs have been shown to respond appropriately to over two hundred words in human language. In this introduction to the philosophy of animal minds Kristin Andrews introduces and assesses the essential topics, problems and debates as they cut across (...) animal cognition and philosophy of mind. She addresses the following key topics: what is cognition, and what is it to have a mind? What questions should we ask to determine whether behaviour has a cognitive basis? the science of animal minds explained: ethology, behaviourist psychology, and cognitive ethology rationality in animals animal consciousness: what does research into pain and the emotions reveal? What can empirical evidence about animal behaviour tell us about philosophical theories of consciousness? does animal cognition involve belief and concepts; do animals have a ‘Language of Thought’? animal communication other minds: do animals attribute ‘mindedness’ to other creatures? moral reasoning and ethical behaviour in animals animal cognition and memory. Extensive use of empirical examples and case studies is made throughout the book. These include Cheney and Seyfarth’s ververt monkey research, Thorndike’s cat puzzle boxes, Jensen’s research into humans and chimpanzees and the ultimatum game, Pankseep and Burgdorf’s research on rat laughter, and Clayton and Emery’s research on memory in scrub-jays. Additional features such as chapter summaries, annotated further reading and a glossary make this an indispensable introduction to those teaching philosophy of mind, animal cognition. It will also be an excellent resource for those in fields such as ethology, biology and psychology. (shrink)

A persistent methodological problem in primate social cognition research has been how to determine experimentally whether primates represent the internal goals of other agents or just the external goals of their actions. This is an instance of Daniel Povinelli’s more general challenge that no experimental protocol currently used in the field is capable of distinguishing genuine mindreading animals from their complementary behavior-reading counterparts. We argue that current methods used to test for internal-goal attribution in primates do not solve Povinelli’s (...) problem. To overcome the problem, a new type of experimental approach is needed, one which is supported by an alternative theoretical account of animal mindreading, called the appearance-reality mindreading (ARM) theory. We provide an outline of the ARM theory and show how it can be used to design a novel way to test for internal-goal attribution in chimpanzees. Unlike protocols currently in use, the experimental design presented here has the power, in principle and in practice, to distinguish genuine mindreading chimpanzees from those who predict others’ behavior solely on the basis of behavioral/environmental cues. Our solution to Povinelli’s problem has important consequences for a similar debate in developmental psychology over when preverbal infants should be credited with the ability to attribute internal goals. If what we argue for here in the case of nonhuman primates is sound, then the clearest tests for internal-goal attribution in infants will be those that test for attributions of discrepant or ‘false’ perceptions. (shrink)

Culture in humans connotes tradition, norms, ritual, technology, and social learning, but also cultural events like operas or gallery openings. Culture is in part about what we do, but also sometimes about what we ought to do. Human culture is inextricably intertwined with language and much of what we learn and transmit to others comes through written or spoken language. Given the complexities of human culture, it might seem that we are the only species that exhibits culture. How, then, are (...) we to make sense of culture in animals? The study of animal culture is a booming research area. Culture is said to occur in a wide range of vertebrates from our close kin, chimpanzees and orangutans, to more distant relatives like rats and whales. Could these studies be misleading in that they are not actually studying culture but simply misapplying the term ‘culture’? Or is what is labeled culture in animals at the core of human culture, so that although human culture is more elaborate than animal culture, it is different in degree, not kind? While it is certainly easy to intentionally define culture in a way that makes it unique to humans, because of the growing field of animal culture, it would be most useful to attempt to offer a definition of culture that makes sense of how it is used by psychologists, biologists, anthropologists, and others who use the term culture in studies of animal behavior. The challenge is to produce a concept that is broad enough to be able to apply across humans and animals, but not be so anemic that it cannot do justice to human culture. Because of this, I will here construct a definition of animal culture and draw out some of its implications. (shrink)

Since Darwin, the idea of psychological continuity between humans and other animals has dominated theory and research in investigating the minds of other species. Indeed, the field of comparative psychology was founded on two assumptions. First, it was assumed that introspection could provide humans with reliable knowledge about the causal connection between specific mental states and specific behaviors. Second, it was assumed that in those cases in which other species exhibited behaviors similar to our own, similar psychological causes were (...) at work. In this paper, we show how this argument by analogy is flawed with respect to the case of second‐order mental states. As a test case, we focus on the question of how other species conceive of visual attention, and in particular whether chimpanzees interpret seeing as a mentalistic event involving internal states of perception, attention, and belief. We conclude that chimpanzees do not reason about seeing in this manner, and indeed, there is considerable reason to suppose that they do not harbor representations of mental states in general. We propose a reinterpretation model in which the majority of the rich social behaviors that humans and other primates share in common emerged long before the human lineage evolved the psychological means of interpreting those behaviors in mentalistic terms. Although humans, chimpanzees, and most other species may be said to possess mental states, humans alone may have evolved a cognitive specialization for reasoning about such states. (shrink)

Tool use is a central topic in research on cognitive evolution and behavioral ecology in non-human animals. Originally thought to be a uniquely human phenomenon, many other species have been observed making and using tools for a variety of purposes, starting with Goodall’s groundbreaking work with chimpanzees in Gombe. Despite the frequent attention and great research interest in animal tool use, and ubiquity of the behavior, we argue here that chewing sticks by dogs should be included as a (...) case of tool use. We discuss alternate possible explanations and then propose several testable predictions regarding this hypothesis. We suggest that tool use may be more common than is often assumed and that many cases of animal tool use may be overlooked. (shrink)