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Articles 1 - 30 of 85
Full-Text Articles in Arts and Humanities
The Inconvenient Truth About Thinking Chickens, Lori Marino
The Inconvenient Truth About Thinking Chickens, Lori Marino
Animal Sentience
Original Abstract: Domestic chickens are members of an order, Aves, which has been the focus of a revolution in our understanding of neuroanatomical, cognitive, and social complexity. Some birds are now known to be on a par with many mammals in their intelligence, emotional sophistication, and social interaction. Yet views of chickens have largely remained unrevised in light of this new evidence. In this paper, I examine the data on cognition, emotions, personality, and sociality in chickens, exploring such areas as self-awareness, cognitive bias, social learning and self-control, and comparing their abilities with other birds and other vertebrates, particularly …
Chicken Of The Sea, Jonathan Balcombe
Chicken Of The Sea, Jonathan Balcombe
Animal Sentience
Marino summarizes research showing that chickens perform cognitively and emotionally at a higher level than previously assumed. Here, I describe capacities of teleost fishes that parallel those of chickens, including the ability to recognize human faces, perspective-taking, and referential communication. Research on chickens and on fishes reveals an emerging trend in cognitive ethology: abilities once thought limited to a scant few highly intelligent non-humans may actually occur broadly across taxa.
Tribute To Jaak Panksepp, Jonathan Balcombe
Self, Death, And Suicide: Does An Animal Know Of These?, Carolyn A. Ristau
Self, Death, And Suicide: Does An Animal Know Of These?, Carolyn A. Ristau
Animal Sentience
Peña-Guzmán makes a strong case, using examples from the media and scientific literature, that many captive animals suffer severely. In examining the possibility of animal suicide, he dismisses the need for “reflective self-subjectivity” and “intent” in suicidal behavior. He claims that at least some animals understand “death,” citing examples of behavior he deems to be death “rituals.” But these can be more simply interpreted. The possibility of animal suicide remains more dubious than Peña-Guzmán suggests.
Raising Consciousness About Chicken Consciousness, Bernard Rollin
Raising Consciousness About Chicken Consciousness, Bernard Rollin
Animal Sentience
The topics explored by Marino are definitive, and should work well to lay to rest forever the widespread belief that chickens have no personality, are unintelligent, or in any other way lack a mental life.
Can Nonhuman Animals Commit Suicide?, David M. Peña-Guzmán
Can Nonhuman Animals Commit Suicide?, David M. Peña-Guzmán
Animal Sentience
Many people believe that only humans have the cognitive and behavioral capacities needed for suicidal behavior, such as reflexive subjectivity, free will, intentionality, or awareness of death. Three counterarguments — based on (i) negative emotions and psychopathologies among nonhuman animals, (ii) the nature of self-destructive behavior, and (iii) the problem of model fidelity in suicide research — suggest that self-destructive and self-injurious behaviors among human and nonhuman animals vary along a continuum.
Chickens’ Brains, Like Ours, Are Lateralized, Lesley J. Rogers
Chickens’ Brains, Like Ours, Are Lateralized, Lesley J. Rogers
Animal Sentience
This commentary draws attention to yet another attribute that has been instrumental in demonstrating the cognitive abilities of domestic chicks: lateralization of brain function. The discovery of lateralization in domestic chicks was part of the first evidence showing that humans are not unique in this respect. The effects on cognitive ability of sensory stimulation in critical stages of development have implications for the welfare of chicks, as well as other species.
Sentience Does Not Require “Higher” Cognition, Giorgio Vallortigara
Sentience Does Not Require “Higher” Cognition, Giorgio Vallortigara
Animal Sentience
I agree with Marino (2017a,b) that the cognitive capacities of chickens are likely to be the same as those of many others vertebrates. Also, data collected in the young of this precocial species provide rich information about how much cognition can be pre-wired and predisposed in the brain. However, evidence of advanced cognition — in chickens or any other organism — says little about sentience (i.e., feeling). We do not deny sentience in human beings who, because of cognitive deficits, would be incapable of exhibiting some of the cognitive feats of chickens. Moreover, complex problem solving, such as transitive inference, …
Are Chicken Minds Special?, Rafael Freire, Susan J. Hazel
Are Chicken Minds Special?, Rafael Freire, Susan J. Hazel
Animal Sentience
The number of publications on chicken cognition and emotion exceeds that on most birds and is comparable to the number of publications on some more “advanced” mammals. We argue that the chicken is an excellent model for this type of research because of (1) the presence of well-established fundamental mental processes in the chicken, (2) a challenging ethological environment and (3) social pressures that may have facilitated the evolution of cognitive abilities similar to those of some mammals. Marino’s (2017) review provides an excellent foundation for the continued study of complex mental abilities in this species.
Getting To The Other Side, Debra Merskin
Getting To The Other Side, Debra Merskin
Animal Sentience
Marino’s comprehensive, detailed, and timely review provides clear evidence of the sentience of chickens and strong support for those wishing to challenge their exclusion from even the limited protections currently accorded to animals grown for food.
In Memory Of Patrick Bateson, James A. Serpell
Misperceiving And Underestimating The Ubiquitous Chicken, Carrie P. Freeman
Misperceiving And Underestimating The Ubiquitous Chicken, Carrie P. Freeman
Animal Sentience
Marino has provided an accurate and nuanced view about chickens’ complex capabilities as sentient individuals. I explore the implications of these findings for scholars as well as for activists in the protection of farmed animals.
Chickening Out Of Change: Will Knowing More About Thinking Chickens Change Public Perceptions?, Ewan Bottomley, Steve Loughnan
Chickening Out Of Change: Will Knowing More About Thinking Chickens Change Public Perceptions?, Ewan Bottomley, Steve Loughnan
Animal Sentience
This commentary examines the next step in Marino’s target article – changing people’s attitudes and beliefs about chickens. The scientific case seems clear: chickens are far more complex, psychologically and socially, than originally thought. Marino suggests we use this information to make people feel uncomfortable about their dietary choices in the hope of changing them. We review the psychological literature, examining how people maintain meat consumption despite the clash with their moral beliefs (the “meat paradox”). This work highlights the important gap between what science knows about animals and what people think about animals.
Scientific Advances And Moral Inertia, Kathie Jenni
Scientific Advances And Moral Inertia, Kathie Jenni
Animal Sentience
Marino shows that chickens are as complex mentally as other birds and mammals. Yet common perceptions of chickens are slow to change in response to the science. Human capacities for willful ignorance, inattention, and avoidance keep us from learning about the animals we harm, and the inertia of habit and tradition keeps us from taking appropriate action in response to what we learn. It’s essential for teachers and activists to find ways to overcome this inattention and inertia.
Cognitive Continuity In Cognitive Dissonance, David R. Brodbeck, Madeleine I. R. Brodbeck
Cognitive Continuity In Cognitive Dissonance, David R. Brodbeck, Madeleine I. R. Brodbeck
Animal Sentience
Zentall’s (2016) model of cognitive dissonance is compatible with cognitive continuity between humans and nonhumans. It may help explain cognitive dissonance-like behavior in many species, including humans. It is also consistent with Tinbergen’s (1963) ‘four whys’ in ethological explanation.
Changes In Behavior And Emotion Under Chicken Domestication, Martin Johnsson
Changes In Behavior And Emotion Under Chicken Domestication, Martin Johnsson
Animal Sentience
Marino’s target article provides an overview of chickens’ cognition, emotion, and personality, with the aim of changing how people view chickens. In this commentary, I will agree that chickens deserve better than their reputation, but contend with a statement about the lack of behavioral change under chicken domestication.
Evolutionary Continuity, Anne Benvenuti
Evolutionary Continuity, Anne Benvenuti
Animal Sentience
The principle of evolutionary continuity states that all animal capacities and behaviors exist — with variations in degree — in continuity with other species. Rather than assuming discontinuity, we should ask why any behavior observed in humans would not be found in at least some other sentient animals under similar conditions. In the case of suicide, the more pertinent issue might be the ethical one: our human responsibility for creating conditions under which other animals might deliberately seek to end their own lives.
On Assisted Suicide, Clark Glymour
On Assisted Suicide, Clark Glymour
Animal Sentience
What would be the moral implications of the capacity for suicide in nonhuman animals? Humans can be helped to end their lives if they no longer find them bearable. Should captive animals not be given the same possibility?
What Is The Pressing “Animal Question” About? Thinking/Feeling Capacity Or Exploitability?, Gordon Hodson
What Is The Pressing “Animal Question” About? Thinking/Feeling Capacity Or Exploitability?, Gordon Hodson
Animal Sentience
Marino’s timely review highlights what humans go to great lengths to ignore and suppress: non-human animals such as chickens have rich inner lives. Although I share her belief that such evidence should provide the impetus for ending the exploitation of chickens, the psychological literatures on motivated reasoning and group-based dominance suggest not only that this is unlikely but that people will push back precisely because of the implications (as they do for climate change). Human psychology has done a great deal to suppress the recognition of sentience in animals, but it can also shed insights into ending exploitation.
Understanding Animal Suicide And Death Can Lead To Better End-Of-Life Care, Jessica Pierce
Understanding Animal Suicide And Death Can Lead To Better End-Of-Life Care, Jessica Pierce
Animal Sentience
Peña-Guzmán’s target article on animal suicide will help inform end-of-life care for animals by emphasizing the need for a broad research focus on animal thanatology. Greater scientific understanding of the continuum of death-related awareness, experiences, and behaviors will help us improve veterinary care for animals at the end of life.
Is Psychological Science Committing “Suicide” By Linguistic Muddling?, Roger K. Thomas
Is Psychological Science Committing “Suicide” By Linguistic Muddling?, Roger K. Thomas
Animal Sentience
Beginning mainly with the “cognitive revolution” in psychology in the latter half of the 20th century, psychological science has been committing “suicide” slowly via linguistic muddling. Peña-Guzmán’s target article is but one of thousands of cuts contributing to this death by “suicide.” Having said that, given the current state of affairs in animal cognition research, there is much to commend in Peña-Guzmán’s article. I leave that to others, however. This commentary explains how the suicide by muddling of psychological science is happening in general, with the understanding that it applies also to Peña-Guzmán’s target article.
Complicated Grief, Teya Brooks Pribac
Complicated Grief, Teya Brooks Pribac
Animal Sentience
My commentary discusses complicated grief and the ensuing sense of helplessness that may lead to suicide. I close with a story about a pygmy pig.
Sentience In Living Tissue, Alfredo Pereira Jr.
Sentience In Living Tissue, Alfredo Pereira Jr.
Animal Sentience
I agree with Woodruff’s concept of sentience but must disagree about what he proposes as the biological correlates of feeling. Based on the interpretation of brain function originally presented by Camilo Golgi, I assume that feelings are instantiated by hydro-ionic waves in living tissue. From this viewpoint, the anatomical, physiological and behavioural criteria of Woodruff would not be necessary to argue for sentience in fish.
Nagel-Ing Worries About Fish Sentience, Hugh Lafollette
Nagel-Ing Worries About Fish Sentience, Hugh Lafollette
Animal Sentience
Woodruff (2017) argues that teleosts’ more sophisticated behaviors make sense only if they are sentient. Moreover, their neuroanatomy, although different from mammalian, is sufficiently complex to support sentience. I answer some potential objections to Woodruff’s argument, and try to trace its moral significance. In so doing, I briefly address Birch’s (2017) target article as well.
Studying Dog Emotion Beyond Expression And Without Concern For Feeling, Peter F. Cook
Studying Dog Emotion Beyond Expression And Without Concern For Feeling, Peter F. Cook
Animal Sentience
Studies of dog emotion have focused on the expression of social emotion, either because this is taken to suggest human-like feeling states in dogs or because it has been the most accessible signal of dog emotional processing. I argue for an approach grounded in affective neuroscience, relying on direct measures of physiology across different contexts. This work may be particularly fertile in exploring social emotion in the dog, not because dogs necessarily share human emotional states, but because they are unique in having likely evolved to fit a human social niche.
Operationalizing Fear Through Understanding Vigilance, Ralph Adolphs
Operationalizing Fear Through Understanding Vigilance, Ralph Adolphs
Animal Sentience
Beauchamp’s target article raises important questions about the features that often accompany fear. How reliable an indicator of fear is vigilance? Is it constitutive, cause, or consequence of fear? These questions force us towards a clearer definition of “fear.”
Individual Variation In Fear Behaviour, Rob Found
Individual Variation In Fear Behaviour, Rob Found
Animal Sentience
Individual variation in behaviour adds another layer of complexity to studies of animal responses to fear and risk, but when individual responses are consistent, and correlated with other behaviours, these patterns can provide a structure that furthers our understanding. I interpret Beauchamp’s review of vigilance and fear from the perspective of my own studies of elk personality. Wild elk responses to changing stimuli (benign or aversive) illustrate how personality is a key factor in explaining variation in vigilance and fear behavior. Personality even influences how wildlife can learn to assess risk and adjust their fear responses accordingly.
Choice-Induced Preference: A Challenge For Contrast, Benjamin R. Eisenreich, Benjamin Y. Hayden
Choice-Induced Preference: A Challenge For Contrast, Benjamin R. Eisenreich, Benjamin Y. Hayden
Animal Sentience
In his target article, Zentall asks: “to experience cognitive dissonance is it necessary for one to have conflicting beliefs or even beliefs at all?” He then argues that a simple behavioral process, the Within Trial Contrast Effect, may be sufficient to explain observed cognitive dissonance effects in nonhuman animals and possibly humans as well. We agree with Zentall that this effect is sufficient to explain many reported cognitive dissonance effects in nonhuman animals, but question its sufficiency for primate behavior (both monkeys and humans).
Cognitive Dissonance Or Contrast? It Could Be Both, Thomas Zentall
Cognitive Dissonance Or Contrast? It Could Be Both, Thomas Zentall
Animal Sentience
My target article suggested that cognitive dissonance may be accounted for by a simpler mechanism: contrast. Whether contrast can explain all cognitive dissonance effects is an empirical question, but it is always useful to try to distinguish simpler mechanisms from more complex cognitive ones. The insistence that cognitive dissonance is a human-only process quite different from contrast may be a self-serving means of justifying the exploitation of animals.
Reductionism And Accounts Of Cognitive Dissonance, Kent D. Bodily
Reductionism And Accounts Of Cognitive Dissonance, Kent D. Bodily
Animal Sentience
Zentall (2016) proposed within-trial contrast as an alternative account of cognitive dissonance with greater parsimony and generalizability between human and nonhuman species. This commentary describes forms of reductionism, categorizes several competing accounts of cognitive dissonance phenomena, and addresses the strengths and weaknesses according to the reductionist form each account takes. A focus on functional relations may make explanation more parsimonious while bridging theoretical divides between human and nonhuman research programs.