Towards the end of his life, St. Thomas Aquinas produced a brief, non-technical work summarizing some of the main points of his massive Summa Theologiae. This 'compendium' was intended as an introductory handbook for students and scholars who might not have access to the larger work. It remains the best concise introduction to Aquinas's thought. Furthermore, it is extremely interesting to scholars because it represents Aquinas's last word on these topics. Aquinas does not break new ground or re-think earlier positions (...) but often states them more directly and with greater precision than can be found elsewhere. There is only one available English translation of the Compendium (published as 'Aquinas's Shorter Summa: Saint Thomas's Own Concise Version of his Summa Theologiae,' by Sophia Institute Press). It is published by a very small Catholic publishing house, is marketed to the devotional readership, contains no scholarly apparatus. Richard Regan is a highly respected Aquinas translator, who here relies on the definitive Leonine edition of the Latin text. His work will be received as the premier English version of this important text. (shrink)
This book explores the moral dimensions of public policy from an Aristotelian-Thomistic perspective. Regan begins with a thorough exposition of natural law theory and proposes ways in which ethical conclusions can be drawn from it. He then goes on to link natural law theory to an analysis of particular areas of public policy as diverse as public morals, social justice, and the morality of warfare.
Discussion of J. Kevin O’Regan’s “Why Red Doesn’t Sound Like a Bell: Understanding the Feel of Consciousness” Content Type Journal Article Pages 1-20 DOI 10.1007/s13164-012-0090-7 Authors J. Kevin O’Regan, Laboratoire Psychologie de la Perception, CNRS - Université Paris Descartes, Centre Biomédical des Saints Pères, 45 rue des Sts Pères, 75270 Paris cedex 06, France Ned Block, Departments of Philosophy, Psychology and Center for Neural Science, New York University, 5 Washington Place, New York, NY 10003, USA Journal Review of (...) Philosophy and Psychology Online ISSN 1878-5166 Print ISSN 1878-5158. (shrink)
O'Regan and Noe present a wonderfully detailed and comprehensive defense of a position whose broad outline we absolutely and unreservedly endorse. They are right, it seems to us, to stress the intimacy of conscious content and embodied action, and to counter the idea of a Grand Illusion with the image of an agent genuinely in touch, via active exploration, with the rich and varied visual scene. This is an enormously impressive achievement, and we hope that the comments that follow (...) will be. (shrink)
When brief blank fields are placed between alternating displays of an original and a modified scene, a striking failure of perception is induced: the changes become extremely difficult to notice, even when they are large, presented repeatedly, and the observer expects them to occur (Rensink, O'Regan, & Clark, 1997). To determine the mechanisms behind this induced "change blindness", four experiments examine its dependence on initial preview and on the nature of the interruptions used. Results support the proposal that representations (...) at the early stages of visual processing are highly volatile, and that focused attention is needed to stabilize them sufficiently to support the perception of change. (shrink)
Call u the triplet of cone quantum catch for the light that is incident on a surface, and v the triplet of cone quantum catch for the light that is reflected off that surface. Philipona & O'Regan (2006) present results from numerical calculations showing that: 1. each surface can be associated with a 3 by 3 matrix A such that the relation v = A u to a very high degree of accuracy for any natural illuminant, 2. the vast (...) majority of such matrices associated with Munsell chips have three real eigenvalues, 3. Munsell chips that are most often given a name in the World Color Survey are chips whose associated matrices have a singular configuration of eigenvalues, as measured by a "singularity index". The conclusion of the paper is that this striking coincidence lends credence to the idea that data about color naming derive from facts about natural lights, surface reflexion properties, and human photopigments, rather than from facts about neural pathways or cortical representations. (shrink)
Methods. We employed a "flicker" technique, in which an original and a modified image (each of duration 240 ms) continually alternated, with a blank field (duration 80 ms) between each display. Images were all of real-world scenes. One of three kinds of change (appearance/disappearance, color, or translation) was made to an object or region in each scene. Changes were large and easily seen under normal conditions. Subjects viewed the flicker display, and pressed a key when they noticed the change.
Many current neurophysiological, psychophysical, and psychological approaches to vision rest on the idea that when we see, the brain produces an internal representation of the world. The activation of this internal representation is assumed to give rise to the experience of seeing. The problem with this kind of approach is that it leaves unexplained how the existence of such a detailed internal representation might produce visual consciousness. An alternative proposal is made here. We propose that seeing is a way of (...) acting. It is a particular way of exploring the environment. Activity in internal representations does not generate the experience of seeing. The out- side world serves as its own, external, representation. The experience of seeing occurs when the organism masters what we call the gov- erning laws of sensorimotor contingency. The advantage of this approach is that it provides a natural and principled way of accounting for visual consciousness, and for the differences in the perceived quality of sensory experience in the different sensory modalities. Sev- eral lines of empirical evidence are brought forward in support of the theory, in particular: evidence from experiments in sensorimotor adaptation, visual “filling in,” visual stability despite eye movements, change blindness, sensory substitution, and color perception. (shrink)
This paper contrasts two enactive theories of visual experience: the sensorimotor theory (O’Regan and Noë, Behav Brain Sci 24(5):939–1031, 2001; Noë and O’Regan, Vision and mind, 2002; Noë, Action in perception, 2004) and Susan Hurley’s (Consciousness in action, 1998, Synthese 129:3–40, 2001) theory of active perception. We criticise the sensorimotor theory for its commitment to a distinction between mere sensorimotor behaviour and cognition. This is a distinction that is firmly rejected by Hurley. Hurley argues that personal level cognitive (...) abilities emerge out of a complex dynamic feedback system at the subpersonal level. Moreover reflection on the role of eye movements in visual perception establishes a further sense in which a distinction between sensorimotor behaviour and cognition cannot be sustained. The sensorimotor theory has recently come under critical fire (see e.g. Block, J Philos CII(5):259–272, 2005; Prinz, Psyche, 12(1):1–19, 2006; Aizawa, J Philos CIV(1), 2007) for mistaking a merely causal contribution of action to perception for a constitutive contribution. We further argue that the sensorimotor theory is particularly vulnerable to this objection in a way that Hurley’s active perception theory is not. This presents an additional reason for preferring Hurley’s theory as providing a conceptual framework for the enactive programme. (shrink)
This paper looks at two puzzles raised by the phenomenon of inattentional blindness. First, how can we see at all if, in order to see, we must first perceptually attend to that which we see? Second, if attention is required for perception, why does it seem to us as if we are perceptually aware of the whole detailed visual field when it is quite clear that we do not attend to all that detail? We offer a general framework for thinking (...) about perception and perceptual consciousness that addresses these questions and we propose, in addition, an informal account of the relation between attention and consciousness. On this view, perceptual awareness is a species of attention. (shrink)
There is an argument promulgated by certain philosophers (notably Dennett 1988, 1991), claiming that from a logical and philosophical point of view the notion of "qualia" makes no sense. On the other hand, other philosophers (e.g. Nagel 1974, Peacocke 1983, and Block 1990) say that qualia must exist since otherwise there would be "nothing it's like" to have sensations: we humans would merely be empty vessels making movements and interacting with our environments, but there would be no inside "feel" to (...) anything. (shrink)
The purpose of this paper is to argue that the tactic of granting a fetus the legal status of a person will not, contrary to the expectations of opponents of abortion, provide grounds for a general prohibition on abortions. I begin by examining two arguments, one moral (J. J. Thomson's A Defense of Abortion) and the other legal (D. Regan's Rewriting Roe v. Wade), which grant the assumption that a fetus is a person and yet argue to the conclusion (...) that abortion is permissible. However, both Thomson and Regan rely on the so-called bad samaritan principle. This principle states that a person has a right to refuse to give aid. Their reliance on this principle creates problems, both in the moral and the legal contexts, since the bad samaritan principle is intended to apply to passive refusals to aid; abortion, however, does not look like any such passive denial of aid, and so it does not seem like the sort of action covered by the bad samaritan principle. In defense of the positions outlined by Thomson and Regan, I argue that the apparent asymmetry between abortion and the usual type of case covered by the bad samaritan principle is only apparent and not a genuine problem for their analyses. I conclude with a defense of the morality of the bad samaritan principle. (shrink)
Machine generated contents note: -- 1. Introduction -- Consciousness and Sensorimotor Dynamics: Methodological Issues -- 2. Computational consciousness, D. Ballard -- 3. Explaining what people say about sensory qualia, J. Kevin O'Regan -- 4. Perception, action, and experience: unraveling the golden braid, A. Clark -- The Two-Visual Systems Hypothesis -- 5. Cortical visual systems for perception and action, A.D. Milner and M.A. Goodale -- 6. Hermann Lotze's Theory of 'Local Sign': evidence from pointing responses in an illusory (...) figure, D.R. Melmoth -- Understanding Agency and Object Perception -- 7. Two visual systems and the feeling of presence, M. Matthen -- 8. Spatial coordinates and phenomenology in the two-visual systems model, P. Jacob and F. de Vignemont -- 9. Perceptual experience and the capacity to act, S. Schellenberg -- Perception and Action: Studies in Cognitive Neuroscience -- 10. Why does the perception-action functional dichotomy not match the ventral-dorsal streams in anatomical segregation: optic ataxia and the function of the dorsal stream, Y. Rossetti et al -- 11. Mapping the neglect syndrome onto neurofunctional streams, G. Vallar and F. Mancini -- 12. Motor representations and the perception of space: perceptual judgments of the boundary of action space, Y. Delevoye-Turrell -- The Role of Action and Sensorimotor Knowledge in Sensorimotor Theories of Perception -- 13. Vision without representation, A. Noe -- 14. Sensorimotor knowledge and the contents of experience, J. Kiverstein -- Boundaries of the Agent -- 15. Extended vision, R. A. Wilson. (shrink)
The most important clarification we bring in our reply to commentators concerns the problem of the “explanatory gap”: that is, the gulf that separates physical processes in the brain from the experienced quality of sensations. By adding two concepts (bodiliness and grabbiness) that were not stressed in the target article, we strengthen our claim and clarify why we think we have solved the explanatory gap problem, – not by dismissing qualia, but, on the contrary, by explaining why sensations have a (...) “feel” and why “feels” feel the way they do. We additionally clarify our views on: internal representations (we claim internal representations cannot explain why sensation has a feel), on behaviorism (we are not behaviorists), on perception and action (we believe there can be perception without action), and on the brain (we believe the brain does do something important in perception). (shrink)
The paper proposes a way of bridging the gapbetween physical processes in the brain and the ''''felt''''aspect of sensory experience. The approach is based onthe idea that experience is not generated by brainprocesses themselves, but rather is constituted by theway these brain processes enable a particular form of''''give-and-take'''' between the perceiver and theenvironment. From this starting-point we are able tocharacterize the phenomenological differences betweenthe different sensory modalities in a more principledway than has been done in the past. We are also (...) ableto approach the issues of visual awareness andconsciousness in a satisfactory way. Finally weconsider a number of testable empirical consequences,one of which is the striking prediction of thephenomenon of ''''change blindness''''. (shrink)
How could neural processes be associated with phenomenal consciousness? We present a way to answer this question by taking the counterintuitive stance that the sensory feel of an experience is not a thing that happens to us, but a thing we do: a skill we exercise. By additionally noting that sensory systems possess two important, objectively measurable properties, corporality and alerting capacity, we are able to explain why sensory experience possesses a sensory feel, but thinking and other mental processes do (...) not. We are additionally able to explain why different sensory feels differ in the way they do. (shrink)
Any theory of experience which postulates that brain mechanisms generate "raw feel" encounters the impassable "explanatory gap" separating physics from phenomenology.
The catastrophe of the eye -- A new view of seeing -- Applying the new view of seeing -- The illusion of seeing everything -- Some contentious points -- Towards consciousness -- Types of consciousness -- Phenomenal consciousness, raw feel, and why they're hard -- Squeeze a sponge, drive a porsche : a sensorimotor account of feel -- Consciously experiencing a feel -- The sensorimotor approach to color -- Sensory substitution -- The localization of touch -- The phenomenality plot -- (...) Consciousness. (shrink)
In this paper, we present an account of phenomenal con- sciousness. Phenomenal consciousness is experience, and the _problem _of phenomenal consciousness is to explain how physical processes.
How could neural processes be associated with phenomenal consciousness? We present a way to answer this question by taking the counterintuitive stance that the sensory feel of an experience is not a thing that happens to us, but a thing we do: a skill we exercise. By additionally noting that sensory systems possess two important, objectively measurable properties, corporality and alerting capacity, we are able to explain why sensory experience possesses a sensory feel, but thinking and other mental processes do (...) not. We are additionally able to explain why different sensory feels differ in the way they do. (shrink)
Recently a number of studies have shown that under certain circumstances, very large changes can be made in a picture without observers noticing them. What characterizes the experiments showing such "Change Blindness" in visual scenes is the fact that the changes are arranged to occur simultaneously with some kind of extraneous, brief disruption in visual continuity, such as the large retinal disturbance produced by an eye saccade, a shift of the picture, a brief flicker, a "mudsplash", an eye blink, or (...) a film cut in a motion picture sequence. These phenomena are attracting an increasing amount of attention from experimental psychologists and from philosophers, because they suggest that humans' internal representation of the visual world is much sparser than usually thought. (shrink)
J.M. Coetzee's Elizabeth Costello is an overtly philosophical novel, at the heart of which are questions concerning the relation of human beings to animals and the discussion of animal rights. The nature of its subject matter and the prominence it gives to dialogue, sometimes of an almost Platonic kind, make it a rich potential resource for moral education. This article begins by imagining a course based on extracts from the novel, intended for teenage students or older people. It goes on (...) to make suggestions for further reading. There is now a rich secondary literature that has developed in response to central elements in Coetzee's text, involving the work of Peter Singer, Tom Regan, Cora Diamond, Stanley Cavell, John McDowell, Cary Wolfe, and Ian Hacking, amongst others. This literature raises questions about the nature of moral philosophy, and it has implications for moral education. (shrink)
Observers inspected normal, high quality color displays of everyday visual scenes while their eye movements were recorded. A large display change occurred each time an eye blink occurred. Display changes could either involve "Central Interest" or "Marginal Interest" locations, as determined from descriptions obtained from independent judges in a prior pilot experiment. Visual salience, as determined by luminance, color, and position of the Central and Marginal interest changes were equalized.
Overview. Consciousness is often considered to have a "hard" part and a not-so-hard part. With the help of work in artificial intelligence and more recently in embodied robotics, there is hope that we shall be able solve the not-so-hard part and make artificial agents that understand their environment, communicate with their friends, and most importantly, have a notion of "self" and "others". But will such agents feel anything? Building the feel into the agent will be the "hard" part.
Recent results showing that large changes in a scene are not noticed if they occur at the same time as a global visual disturbance caused by saccades, flicker, "mudsplashes", or film cuts, are generally explained in terms of a theory in which it is assumed that the observer's internal representation of the outside world is very sparse, containing only what the observer is currently processing. The present paper presents some clarifications of the theory, and some new implications and predictions that (...) arise from it. (shrink)
Word recognition performance varies systematically as a function of where the eyes fixate in the word. Performance is maximal with the eye slightly left of the center of the word, and decreases drastically to both sides of this 'Optimal Viewing Position'. While manipulations of lexical factors have only marginal effects on this phenomenon, previous studies have pointed to a relation between the viewing position effect and letter legibility: When letter legibility drops, the viewing position effect becomes more exaggerated. To further (...) investigate this phenomenon, we improved letter legibility by magnifying letter size in a way that was proportional to the.. (shrink)
(1) The purported evidence for neural filling-in is not evidence for filling-in, but just for long-range dynamic interactions. (2) Vision is perhaps not an “illusion,” but at any rate it is not “pictorial.” (3) The idea of the “world as an outside memory” as well as MacKay's “conditional readiness for action” may help approach an “enactive” theory of vision.
The writings of William H. Whyte do not loom large in the literature of my field: environmental ethics, the branch of ethics devoted to consideration of whether and how there are moral reasons for protecting non-human animals and the larger natural environment. Environmental ethics is a very new field of inquiry, only found in academic philosophy departments since the early 1970s. While there is no accepted reading list of indispensable literature in environmental ethics, certainly any attempt to create such a (...) list would begin with Henry David Thoreau, John Muir, Aldo Leopold, Rachel Carson, and a more recent handful of senior scholars who had been writing on these topics early on, such as J. Baird Callicott, Val Plumwood, Peter Singer, Richard Sylvan, Tom Regan, and Holmes Rolston III (for a review of contemporary environmental ethics, see Light 2002, Palmer 2003, and Wenz 2001). (shrink)
The world's economy expands, food production increases, and technology links people as never before. But the human population grows, rainforests decline, species become extinct, climate change threatens extreme weather, cancer kills more than ever, and nearly a billion people starve as the gap between rich and poor widens. Environmental Ethics Today addresses these matters by exploring beliefs of fact and value guiding human interactions with nature. The style is journalistic, featuring actual controversies and individual stories, but the content is philosophically (...) rigorous. Abstract theories, ideas, and methods, such as utilitarianism, contractarianism, and hermeneutics are introduced as needed to understand and solve practical problems. Should respect for nature limit genetic engineering? Is economic growth the best measrure of progress or can materialism inhibit family values? Does globalization mostly help Third World countries or harm people and poor women? Are experiments on animals immoral? Is biodiversity valuable apart from any human advantage? Overall, does human welfare conflict with nature's integrity. Environmental Ethics Today considers many views including those of Aldo Leopold, Vandana Shiva, Garrett Hardin, Peter Singer, Julian Simon, David Korten, Jane Goodall, Holmes Rolston III, J. Baird Callicott, Karen Warren, Tom Regan, Val Plumwood, Wendell Berry, Father Thomas Berry, Daniel Quinn, and Arne Naess. (shrink)
The recent interest of cognitive- and neuro-scientists in the topic of consciousness (and the dissatisfaction with the present state of knowledge) has revealed deep conceptual differences with Humanists, who have dealt with issues of consciousness for centuries. O'Regan & Noë have attempted (unsuccessfully) to bridge those differences.
A generalized traditional Western world view is compared with a generalized traditional American Indian world view in respect to the practical relations implied by either to nature. The Western tradition pictures nature as material, mechanical, and devoid of spirit (reserving that exclusively for humans), while the American Indian tradition pictures nature throughout as an extended family or society of living, ensouled beings. The former picture invites unrestrained exploitation of nonhuman nature, while the latter provides the foundations for ethical restraint in (...) relation to nonhuman nature. This conclusion is defended against disclaimers by Calvin Martin and Tom Regan. (shrink)
Although O'Regan & Noë (O&N) claim that the world may serve as the viewers' external visual memory, findings from the field of memory research have demonstrated the existence of internal visual representations. These representations are stored in the viewer's brain, contain information regarding visual objects and their relations, guide subsequent exploration of the visual world and promote change detection.
In their target article, O'Regan & Noë (O&N) give convincing arguments for there being no elaborate internal representation of the outside world. We show two more categories of empirical results that can easily be understood within the view that the world serves as an outside memory that is probed only when specific information is needed.
The Animal Ethics Reader is the first comprehensive, state-of-the-art anthology of readings on this substantial area of study and interest. A subject that regularly captures the headlines, the book is designed to appeal to anyone interested in tracing the history of the subject, as well as providing a powerful insight into the debate as it has developed. The recent wealth of material published in this area has not, until now, been collected in one volume. Readings are arranged thematically, carefully presenting (...) a balanced representation of the subject as it stands. It will be essential reading for students taking a course in the subject as well as being of considerable interest to the general reader. Articles are arranged under the following headings: Theories of Animal Ethics; Animal Capacities; Animals for Food; Animal Experimentation; Genetic Engineering of Animals; Ethics and Wildlife; Zoos, Aquaria, and Animals in Entertainment; Companion Animals; Legal Rights for Animals. Readings from leading experts in the field including Peter Singer, Mary Midgley and Bernard Rollin are featured as well as selections from Donald Griffin, Mark Bekoff, Jane Goodall, Raymond Frey, Barbara Orlans, Tom Regan, and Baird Callicott. There is an emphasis on balancing classic and contemporary readings with a view to presenting debates as they stand at this point in time. Each chapter is introduced by the editors and study questions feature at the end. The foreword has been written by Bernard Rollin. (shrink)
