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Articles 1 - 30 of 459
Full-Text Articles in Cognition and Perception
What Does Sentience Mean At The Neural Level?, Björn Brembs
What Does Sentience Mean At The Neural Level?, Björn Brembs
Animal Sentience
Jonathan Birch's (2025) LSE criteria for sentience include motivational trade-offs, exemplified by C. elegansweighing hunger against desiccation risk. Yet once the neural circuit is known, this "trade-off" reduces to a single inhibitory synapse—an ‘elemental’ account discrediting the ‘molar’ one. My commentary illustrates the same discrepancy in Drosophila: dopaminergic ramping during courtship as it progressively suppresses threat-detecting neurons; so persistence past danger reflects recalibrated valuation rather than a weighed decision. As neurobiology increasingly discovers such discrepancies, all criteria resting on behavioral classifications risk being defined away without altering the behavior's validity.
Natural Behavior Vs. Subjective Experience In Fish Welfare Assessments, Ronald G. Oldfield
Natural Behavior Vs. Subjective Experience In Fish Welfare Assessments, Ronald G. Oldfield
Animal Sentience
Several commentaries on the Oldfield & Bonano (2024) target article proposed that natural behavior should play a larger role in assessing the welfare of fishes in zoos and aquariums. However, the natural-behavior concept of animal welfare has been widely criticized because natural behaviors do not necessarily improve welfare, and unnatural behaviors do not necessarily reduce it. I review the three major concepts of animal welfare — physical health, natural behavior, and affect/feelings — and argue that behavior patterns, whether natural or otherwise, should be evaluated according to their effects on health and subjective experience. Using the affect/feelings concept and the …
Artificial Sentience: The Other Side Of The Story, Amanda Sharkey
Artificial Sentience: The Other Side Of The Story, Amanda Sharkey
Animal Sentience
There is another side to the story of the account of artificial sentience — one that makes the possibility of artificial sentience unlikely: the fundamental difference between living bodies and artificial systems. Sentience occurs in strongly embodied, living entities, and not in disembodied artificial systems, nor in robots. The appearance of sentience is exacerbated by deceptive behaviour and anthropomorphism. The risks of keeping an open mind about the required underlying substrate are in wasted efforts to protect systems that cannot suffer, and in placing inappropriate trust in their abilities.
Both Studying And Protecting Octopuses “On Their Own Terms”, Jennifer Jacquet, Janelle Kaz, Becca Franks, Christine Webb
Both Studying And Protecting Octopuses “On Their Own Terms”, Jennifer Jacquet, Janelle Kaz, Becca Franks, Christine Webb
Animal Sentience
Cephalopods – indeed, all animals – “must be seen on their own terms,” with respect for their autonomy and their ecological imperatives. This will provide greater scientific insight along with a more ethical and accurate understanding of minds beyond our own.
Cephalopod Consciousness On “Their Own Terms”: Who Are “They”?, Willa M. Lane, Victor Ajuwon, Nicola S. Clayton
Cephalopod Consciousness On “Their Own Terms”: Who Are “They”?, Willa M. Lane, Victor Ajuwon, Nicola S. Clayton
Animal Sentience
Mather’s call to consider cephalopods’ consciousness “on their own terms” raises the question of the extent to which cephalopods can be considered a homogenous group. While coloeoid cephalopods share traits that strongly distinguish them from other molluscs and invertebrates, they show vast ecological and morphological diversity, with implications for the design of empirical investigations of consciousness. Extending Mather’s argument, we apply Birch et al.’s (2020) five-dimensional model to compare octopus, cuttlefish, squid, and nautilus. This comparison shows that even within a graded rather than categorical framework, putative consciousness profiles depend on which taxa are included in discussions of “cephalopod consciousness.” …
The Term Consciousness And Impressive Evidence For Cephalopod Awareness, Donald M. Broom
The Term Consciousness And Impressive Evidence For Cephalopod Awareness, Donald M. Broom
Animal Sentience
Mather presents comprehensive evidence of cephalopod cognitive ability and of a high level of awareness. The importance of taking account of the biological functioning and adaptations to the living environment is emphasised. An argument is presented that it is better to limit the use of the word conscious to ‘not unconscious’ and to use awareness in relation to the various levels of cognitive functioning.
The Consciousness Inherent In Chasing Your Tail, Sergio M. Pellis Dr.
The Consciousness Inherent In Chasing Your Tail, Sergio M. Pellis Dr.
Animal Sentience
Who is conscious and how do we know? Complexity in behavior and cognition is certainly a clue that cannot be ignored in identifying this trait, and as Mather’s target article shows, it is hard not to imagine consciousness arising in cephalopods. But how complex is complex? An alternative may be gleaned from the fact that all living things rely on negative feedback to navigate their worlds, and this requires all sentient beings knowing what is to be stabilized in reflection to themselves. If so, consciousness is a universal trait.
Consciousness Below Scuba Depths, Michael Vecchione
Consciousness Below Scuba Depths, Michael Vecchione
Animal Sentience
Abstract: Jennifer Mather has nicely summarized what is known about consciousness in shallow water octopods as well as what is known about shallow water squids and cuttlefish. However, once she gets below SCUBA depths, she misses out on most of cephalopod diversity. I have attempted to add this aspect and perhaps some evolutionary biology to this target article.
Cephalopod Consciousness: Asking The Right Questions, Gordon Burghardt
Cephalopod Consciousness: Asking The Right Questions, Gordon Burghardt
Animal Sentience
Jennifer Mather has provided a comprehensive and fascinating overview of the various cognitive accomplishments of cephalopods and their sensory, behavioral, and neurophysiological attributes. The advances in our understanding of a clade that has been separated from vertebrate evolution by well over half a billion years is a testament to advances in both methodology and the questions we now feel free to address. Mather embeds her review in the issue of consciousness, which is certainly a perennial issue in mental evolution, going back to Romanes and earlier. I argue that the term “consciousness” has such a checkered history and is used …
Précis Of The Edge Of Sentience: Risk And Precaution In Humans, Other Animals, And Ai, Jonathan Birch
Précis Of The Edge Of Sentience: Risk And Precaution In Humans, Other Animals, And Ai, Jonathan Birch
Animal Sentience
We often face grave practical decisions that seem to hinge on whether a system is sentient. This family of cases includes invertebrate animals, people who are unresponsive after brain injury, fetuses, neural organoids, and now AI technologies. We must decide what to do despite ongoing disagreement about the nature of sentience. In our state of uncertainty, we should pragmatically transform the question from “Is it sentient?” to “Is it a sentience candidate, an investigation priority, or neither?”. When a system is a sentience candidate, it is negligent to fail to consider precautions. We should instead evaluate precautions for their proportionality …
Griffin's Slow Burn Revolution In Philosophy And Comparative Cognition, Kristin Andrews
Griffin's Slow Burn Revolution In Philosophy And Comparative Cognition, Kristin Andrews
Animal Sentience
Ristau presents Griffin as launching a scientific revolution supported by philosophical insights. This commentary focuses on two points: Griffin as a scientific revolutionary, although the cognitive ethology revolution is not yet complete; and on the immense influence Griffin had, and continues to have, on philosophy.
What Is It Like To Be A Diplomat? Reflections On Donald Griffin And Emotion, Oliver H. Turnbull
What Is It Like To Be A Diplomat? Reflections On Donald Griffin And Emotion, Oliver H. Turnbull
Animal Sentience
This commentary addresses three aspects of Donald Griffin’s work: (1) his thoughts beyond cognition, on emotion; (2) his views on the earliest origins of mind, including primitive forms of consciousness; and (3) his diplomatic use of memorable phrases to facilitate change.
Can Animal Consciousness Be Resolved Scientifically?, Yoram Gutfreund
Can Animal Consciousness Be Resolved Scientifically?, Yoram Gutfreund
Animal Sentience
Carolyn Ristau's biography of Donald Griffin is a comprehensive work that sheds light on a seminal chapter in the history of ethology—the ambitious attempt to establish a research field dedicated to animal consciousness. Although Donald Griffin's endeavor ultimately fell short of its revolutionary goals, it catalyzed significant progress in understanding evolution and mechanisms of animal cognition.
Beyond Human Perception: The Remarkable Science Of Donald R. Griffin, Gareth Jones
Beyond Human Perception: The Remarkable Science Of Donald R. Griffin, Gareth Jones
Animal Sentience
Carolyn Ristau shows how Donald Griffin’s revolutionary science sometimes progressed from ridicule, to opposition, to being self-evident. Griffin’s work involved phenomena beyond human perception, making it sometimes difficult for others to fathom. His work on ultrasonic echolocation, navigation and animal cognition has shifted established paradigms. His ‘zoomorphic’ approach provides a realistic framework for understanding how other animals perceive the world.
Social Learning And Cultural Enrichment For Fish Welfare, Chiawen Chiang, Becca Franks
Social Learning And Cultural Enrichment For Fish Welfare, Chiawen Chiang, Becca Franks
Animal Sentience
This commentary examines how understanding animal culture—shared behaviors and knowledge transmitted through social learning—plays a role in advancing welfare practices for captive fishes. Despite extensive evidence of fishes' complex sociocultural capacities, their psycho-social needs remain underestimated and unmet in zoos and aquaria. We explore what considering fish culture might mean for welfare practices: diverse social learning opportunities, cultural development, and thoughtful group management. More knowledge about wild fishes' lives will help bridge the gap between their full, complex lives and current captive welfare practices.
Donald Griffin: A Visionary In Science And Consciousness, Brock Fenton
Donald Griffin: A Visionary In Science And Consciousness, Brock Fenton
Animal Sentience
I share some reflections on a sabbatical with Donald Griffin a half-century ago, with fieldwork on bats and echolocating swiftlets in Australia and our discussions of animal behavior and consciousness. Griffin's influence has been vast, from recent advances in bat research, including learning, navigation, and longevity, to his enduring legacy as a pioneer in animal cognition.
Communication In Noise Is The Window On Cognition, R. Haven Wiley
Communication In Noise Is The Window On Cognition, R. Haven Wiley
Animal Sentience
As Griffin surmised, communication is the window on cognition, but as shown here, only if it is noisy. This commentary is an invitation to consider the full implications of the evolution of noisy communication. A combination of Information Theory, Signal Detection Theory, and Natural Selection, in a unified theory of the evolution of communication, reveals that noise is inevitable. All organisms are thus decision makers. Perception, thought, freedom of decision, self-awareness, metabolism, and natural selection all share the consequences of signals in noise. A full understanding of each requires attention to the errors of receivers. Griffin’s hunch is correct with …
Attempting To Answer The Question Of Animal Awareness, Alexandra Horowitz
Attempting To Answer The Question Of Animal Awareness, Alexandra Horowitz
Animal Sentience
It was as a graduate student that I first encountered the work of both Donald Griffin and Carolyn Ristau. Griffin's The Question of Animal Awareness (1976) and Animal Minds (2001) helped a budding animal-minds researcher appreciate both the possibilities of studying non-human animal consciousness and the struggle that such an undertaking would face. Now Ristau's (2024a,b) timely biography helps explain how Griffin became the figure in animal cognition that he is.
Donald Griffin, Sentience, And Animal Research Ethics, John Gluck
Donald Griffin, Sentience, And Animal Research Ethics, John Gluck
Animal Sentience
Recollection of early encounters with Donald Griffin’s pioneering work on animal awareness, provoking intense, often hostile academic responses, later forgotten.
Can We Use Judgement Bias To Assess The Welfare Of Fish In Aquariums And Zoos?, Culum Brown
Can We Use Judgement Bias To Assess The Welfare Of Fish In Aquariums And Zoos?, Culum Brown
Animal Sentience
This commentary examines the potential of tests of judgment bias to assess fish welfare in aquariums and zoos. Judgment bias offers a non-invasive approach to interpreting affective states in animals, using cognitive responses to ambiguous stimuli as indicators of mental wellbeing. Despite the constraints of captive environments—such as limited handling and species diversity in exhibits—recent adaptations of judgment-bias protocols make them suitable across taxa, including fishes. Collaborations with progressive zoos and aquariums could facilitate this research, based on the shared goal of enhancing animal welfare and promoting public education.
Species Vary In Within-Species Variability, Jennifer Vonk
Species Vary In Within-Species Variability, Jennifer Vonk
Animal Sentience
Owens et al. (2024) add to the growing voices stressing the importance of considering individual differences in animal welfare and conservation. I advocate for an additional emphasis on the importance of between species comparisons of the degree of individual variation in cognition and emotion within species. A better understanding of the factors predicting within-species variability will help conservationists target their efforts. Additionally, I caution against invoking circularity in using “behavioural traits” to predict related behaviours.
Don Griffin And The Early Days Of Cognitive Ethology, Gordon M. Burghardt
Don Griffin And The Early Days Of Cognitive Ethology, Gordon M. Burghardt
Animal Sentience
Carolyn Ristau’s trilogy provides a comprehensive account of Donald Griffin’s life and work, with the third volume focusing on cognitive ethology. This commentary focuses primarily on my own interactions with Don, particularly during my sabbatical at Rockefeller University when his campaign for cognitive ethology was gaining momentum. I recount my research on reptile behavior and cognition, my collaboration with Don and others at RU, and my role in advancing his ideas while contextualizing them within 19th-century comparative psychology. I also discuss developments in cognitive ethology, including critical anthropomorphism, the challenges of integrating subjective experience into behavioral science, and Griffin’s lasting …
Animal Communication And Sentience, Catia Correia-Caeiro, Katja Liebal
Animal Communication And Sentience, Catia Correia-Caeiro, Katja Liebal
Animal Sentience
Segundo-Ortin & Calvo (S&C) argue for sentience in plants on the basis of several studies of what they describe as "cognitive abilities" in plants. As other commentaries (e.g., Brooks Pribac, 2023; Damasio & Damasio, 2023; ten Cate, 2023) have pointed out, however, there is some misuse of several concepts, and a lack of evidence for sentience. We try to clarify three questions in S&C’s discussion: (1) How is communication defined and conceptualised in animal research? (2) Is plant communication comparable to animal communication? (3) Is communication (or the process we see in plants) a good basis for inferring sentience in …
Plant Sentience: The Burden Of Proof, Jon Mallatt, David G. Robinson, Michael R. Blatt, Andreas Draguhn, Lincoln Taiz
Plant Sentience: The Burden Of Proof, Jon Mallatt, David G. Robinson, Michael R. Blatt, Andreas Draguhn, Lincoln Taiz
Animal Sentience
Segundo-Ortin & Calvo’s (2023) target article takes a less speculative and more evidence-based approach to plant sentience than did previous works promoting that idea. However, it retains many of the idea’s longstanding difficulties such as starting from a false dichotomy (plants must be either hardwired or sentient), not accepting the full burden of proof for an extraordinary claim, confusingly redefining accepted cognitive terms, implying cell consciousness, not adopting the most parsimonious explanations for plant behaviors, and downplaying all the counterevidence. We advise rectifying these problems before plant sentience can become a full-fledged scientific domain.
Plant Sentience: "Feeling" Or Biological Automatism?, Andrea Mastinu
Plant Sentience: "Feeling" Or Biological Automatism?, Andrea Mastinu
Animal Sentience
Sentience refers to the ability of an organism to have subjective experiences such as sensations, emotions and awareness. Whereas some animals, including humans, are widely recognized as sentient, the question of whether plants are sentient is still debated among scientists, philosophers, and ethicists. Over the past 20 years, many scientists such as Trewavas, Baluška, Mancuso, Gagliano, and Calvo have reported interesting discussions about memory, behavior, communication, and intelligence in plants. However, the reported conclusions have not convinced the entire scientific community. In this commentary, I would like to focus on two critical aspects related to sentience: cognition and emotion
Plant Sentience: A Hypothesis Based On Shaky Premises, Carel Ten Cate
Plant Sentience: A Hypothesis Based On Shaky Premises, Carel Ten Cate
Animal Sentience
Plants may produce fascinating behavioural phenomena for which the label ‘cognitive process’ may be applicable, at least by some definitions. Segundo-Ortin & Calvo (2023) base their hypothesis that plants might be sentient on the premise of demonstrated presence of cognitive complexity. However, the way phenomena are ascribed, and how the term ‘cognitive’ is used by Segundo-Ortin & Calvo, deviates from the common practice in studies of animal cognition, implying greater complexity than seems justified. It thus provides a questionable basis for attributing sentience to plants.
Plant Sentience: Bias And Promise, Sidney Carls-Diamante
Plant Sentience: Bias And Promise, Sidney Carls-Diamante
Animal Sentience
Whichever side of the debate one chooses, plant sentience is a fertile research area that challenges received views and assumptions, generates novel insights, and suggests new ways that felt states might arise. My commentary discusses methodological and philosophical implications.
Sentience: Back To The Science From The Words, David A. Booth
Sentience: Back To The Science From The Words, David A. Booth
Animal Sentience
Contributors to this discussion acknowledge ambiguities in the terms used, including ‘feelings’, ‘behavior’, ‘cognition’ and ‘sentience’ itself. Yet they continue to use such words without reference to scientific criteria established by experimental psychology.
Plants Lack The Functional Neurotransmitters And Signaling Pathways Required For Sentience In Animals, David G. Robinson, Michael R. Blatt, Andreas Draguhn, Lincoln Taiz, Jon Mallatt
Plants Lack The Functional Neurotransmitters And Signaling Pathways Required For Sentience In Animals, David G. Robinson, Michael R. Blatt, Andreas Draguhn, Lincoln Taiz, Jon Mallatt
Animal Sentience
We cannot agree with Segundo-Ortin and Calvo that plants are sentient organisms. We have critically examined several aspects of their target article, and find their claims are not supported by the published evidence. We address these claims in sections on whether plants have a ‘neurobiology’ analogous to that of animal nervous systems, including neurotransmitters and synaptic receptors that respond to anesthetics; and whether plant signaling resembles neural transmission. For the latter, we especially consider the unique way plants signal their responses to wounding. Although the plant vascular system has been compared to the animal nervous system, animal blood vessels would …
Plants Detect And Adapt, But Do Not Feel, Paul C. Struik
Plants Detect And Adapt, But Do Not Feel, Paul C. Struik
Animal Sentience
Plant sentience is a hot topic in scientific and popular media. There are moral reasons to respect both the service of plants to humanity and their natural integrity as creatures playing their own significant role in a complex ecosystem. However, to infer that plants have certain cognitive capacities that are present also in certain human and nonhuman animals calls for scientific rigor beyond mere analogy. The unique capacities of plants identified by Segundo-Ortin & Calvo are not necessarily linked to sentience. Nor is it likely that sentience is an evolutionary trait that is present to some extent in all living …