Illusions that produce perceptual suppression despite constant retinal input are used to manipulate visual consciousness. Here we report on a powerful variant of existing techniques, Continuous Flash Suppression. Distinct images flashed successively around 10 Hz into one eye reliably suppress an image presented to the other eye. Compared to binocular rivalry, the duration of perceptual suppression increased more than 10-fold. Using this tool we show that the strength of the negative afterimage of an adaptor was reduced by half when (...) it was perceptually suppressed by input from the other eye. The more likely the adaptor was completely suppressed, the larger the reduction of the afterimage intensity. Paradoxically, trial-to-trial visibility of the adaptor did not correlate with the degree of suppression. Our results imply that formation of afterimages involves neuronal structures that access input from both eyes, but that do not correspond directly to the neuronal correlates of perceptual awareness. (shrink)

In order to identify the neural correlates of consciousness it is necessary to distinguish these from the neural correlates associated with unconscious information processing. We describe the various techniques, such as masking, which can be used to generate conditions in which the same stimulus is presented either just above or just below a threshold for visibility. Directed attention can also be used to manipulate the extent to which a stimulus gains access to awareness, as can various methods for creating bi‐stable (...) perception. A major problem for these studies is the possible confound of the need for participants to report their awareness and there is currently much interest in developing paradigms in which reporting awareness is not required. We also discuss studies exploring the neural correlates of imagination, illusions and hallucinations in which a perceptual experience occurs in the absence of a physical stimulus. Finally we consider techniques that go beyond correlation and attempt to identify the necessary and sufficient neural processes leading to conscious experience. (shrink)

According to one theory, the brain is a sophisticated hypothesis tester: perception is Bayesian unconscious inference where the brain actively uses predictions to test, and then refine, models about what the causes of its sensory input might be. The brain’s task is simply continually to minimise prediction error. This theory, which is getting increasingly popular, holds great explanatory promise for a number of central areas of research at the intersection of philosophy and cognitive neuroscience. I show how the theory can (...) help us understand striking phenomena at three cognitive levels: vision, sensory integration, and belief. First, I illustrate central aspects of the theory by showing how it provides a nice explanation of why binocular rivalry occurs. Then I suggest how the theory may explain the role of the unified sense of self in rubber hand and full body illusions driven by visuotactile conflict. Finally, I show how it provides an approach to delusion formation that is consistent with one-deficit accounts of monothematic delusions. (shrink)

Examines the philosophy, psychology, and neuroscience behind visual experience. Chapters on attention, illusions, aftereffects, binocular rivalry, hemispheric differences, attentional blink, agnosias and other disorders. Particular attention paid to consciouseness. The systematic review of key topics and the multitude of perspectives make this book an ideal primary or ancillary text for graduate courses in perception, vision, consciousness, or philosophy of mind.

In this chapter, data concerning the development of principal aspects of vision is reviewed. First, the development of colour vision and luminance perception is discussed. Relevant data accumulated so far indicates that perception of colour and luminance is present by 6-9 months of age. The presence of typical color illusions at this age suggests that the phenomenal character of color experience is comparable to that of adults well before the first birthday. Thus it seems plausible that color perception develops on (...) the grounds of genetically preprogrammed maturation, in which perceptual learning and plasticity play a limited role. This claim also seems to be supported by case studies of newly sighted patients. On the other hand, perceptual integration of edges and forms in the visual environment as well as the development of binocular vision, and the perception of ambiguous figures seem to depend crucially on early perceptual learning. Both developmental and clinical data indicate a more significant involvement of perceptual learning in such mid-level and higher level perceptual phenomena. (shrink)

Much of the contemporary debate in the philosophy of mind is concerned with the clash between certain strongly held intuitions and what science tells us about the mind and its relation to the world. What science tells us about the mind points strongly towards some version or other of physicalism. The intuitions, in one way or another, suggest that there is something seriously incomplete about any purely physical story about the mind.

The Appendix to the Transcendental Dialectic of Kant's first Critique is notorious for two reasons. First, it appears to contradict itself in saying that the idea of the systematic unity of nature is and is not transcendental. Second, in the passages in which Kant appears to espouse the former alternative, he appears to be making a significant amendment to his account of the conditions of the possibility of experience in the Transcendental Analytic. I propose a solution to both of these (...) difficulties. With regard to the first, I argue that Kant does not contradict himself. With regard to the second, I argue that Kant is not making any change to his view of the conditions of the possibility of experience espoused in the Transcendental Analytic. The underlying cause of these apparent problems is also their solution: the transcendental illusion that nature is necessarily systematic. (shrink)

Recent work in cognitive science suggests that conscious thought plays a much less central role in the production of human behavior than most think. Partially on the basis of this work, Peter Carruthers has advanced the claim that humans never consciously decide to act. This claim is of independent interest for action theory, and its potential truth poses a problem for theories of free will and autonomy, which often take our capacity to consciously decide to be of central importance. In (...) this article, I examine the nature of conscious deciding and I argue that Carruthers fails to establish the claim that humans never consciously decide to act. (shrink)

In this paper I explore a brand of scepticism about perceptual experience that takes its start from recent work in psychology and philosophy of mind on change blindness and related phenomena. I argue that the new scepticism rests on a problematic phenomenology of perceptual experience. I then consider a strengthened version of the sceptical challenge that seems to be immune to this criticism. This strengthened sceptical challenge formulates what I call the problem of perceptual presence. I show how this problem (...) can be addressed by drawing on an enactive or sensorimotor approach to perceptual consciousness. Our experience of environmental detail consists in our access to that detail thanks to our possession of practical knowledge of the way in which what we do and sensory stimulation depend on each other. (shrink)

As John Casti wrote, "Finally, a book that really does explain consciousness." This groundbreaking work by Denmark's leading science writer draws on psychology, evolutionary biology, information theory, and other disciplines to argue its revolutionary point: that consciousness represents only an infinitesimal fraction of our ability to process information. Although we are unaware of it, our brains sift through and discard billions of pieces of data in order to allow us to understand the world around us. In fact, most of what (...) we call thought is actually the unconscious discarding of information. What our consciousness rejects constitutes the most valuable part of ourselves, the "Me" that the "I" draws on for most of our actions--fluent speech, riding a bicycle, anything involving expertise. No wonder that, in this age of information, so many of us feel empty and dissatisfied. As engaging as it is insightful, this important book encourages us to rely more on what our instincts and our senses tell us so that we can better appreciate the richness of human life. (shrink)

This is a profound and concise essay on the basic structure of contemporary politics, written throughout in a voice that is sceptical, engaged, and clear.

I was asked to lecture at the 2004 Wittgenstein conference in Kirchberg on the subject of phe- nomenology. This request surprised me somewhat because I am certainly not a scholar on the writings of phenomenological philosophers, nor have I done much work that I consider phe- nomenological in any strict sense. However, I was glad to accept the invitation, since I have had some peculiar experiences with phenomenology. Also, it seemed worth discussing this issue at a Wittgenstein conference because the (...) recent revival of interest in consciousness among ana- lytic philosophers has lead to a renewed interest in phenomenological authors, since, of course, phenomenology is in large part concerned with consciousness. (shrink)

Some moral claims strike us as objective. It is often argued that this shows morality to be objective. Moral experience – broadly construed – is invoked as the strongest argument for moral realism, the thesis that there are moral facts or properties.See e.g. Jonathan Dancy, “Two conceptions of Moral Realism,” Proceedings of the Aristotelian Society 60 : 167–187. Realists, however, cannot appropriate the argument from moral experience. In fact, constructivists argue that to validate the ways we experience the objectivity of (...) moral claims, realism must be rejected.Christine M. Korsgaard, The Sources of Normativity . There is a general agreement that ethical theory bears the burden of proof of explaining the objective-seeming features of our moral experience.While disputing objectivity, antirealists commit themselves to account for the objectivist pretensions of moral claims. Anti-realists agree with the traditional view that moral experie .. (shrink)

It has become common for business practitioners and management scholars to distinguish between compliance and ethics. According to the conventional distinction as expressed in Paine’s formulation of Integrity Strategy, compliance is ordinarily a necessary but insufficient condition for ethics. Now that this distinction has been institutionalized in the most significant judicial, legislative, and regulatory developments in American business conduct management since the Enron failure, it is worth asking whether the current emphasis on ethics represents progress. Does it make logical and (...) practical sense to impose ethics as a compliance requirement, or have we come full circle? I argue that assertions of organizational ethical progress, usually involving an increase in the number and or severity of compliance restrictions, do not get the conventional distinction quite right. Moreover, under the consensus distinction, there can be no such thing as organizational ethical progress. However, our ordinary ways of talking about business conduct management often betray logical confusions about the ethics–compliance relationship. While the metaphors we employ – “higher standards,” “raising the bar,” “gray areas,” and “crossing the line,” etc. – perform a worthwhile function as standards for external evaluation of business conduct, they also have a tendency to limit and impoverish our conception of what it is to be ethical. The idea that ethics matters is fundamental to Integrity Strategy’s implicit claim, consistent with conventional wisdom and moral theory, that the objective of responsible conduct cannot be achieved solely by imposing from outside what is required but must also appeal to what is desired. (shrink)

First published in 1962, this is a book about Marx and Freud - the two intellectual giants of the 20th century.

How do we acquire a mental representation of our own face? Recently, synchronous, but not asynchronous, interpersonal multisensory stimulation between one’s own and another person’s face has been used to evoke changes in self-identification. We investigated the conscious experience of these changes with principal component analyses that revealed that while the conscious experience during synchronous IMS focused on resemblance and similarity with the other’s face, during asynchronous IMS it focused on multisensory stimulation. Analyses of the identified common factor structure revealed (...) significant quantitative differences between synchronous and asynchronous IMS on self-identification and perceived similarity with the other’s face. Experiment 2 revealed that participants with lower interoceptive sensitivity experienced stronger enfacement illusion. Overall, self-identification and body-ownership rely on similar basic mechanisms of multisensory integration, but the effects of multisensory input on their experience are qualitatively different, possibly underlying the face’s unique role as a marker of selfhood. (shrink)

Quantum physics is believed to be the fundamental theory underlying our understanding of the physical universe. However, it is based on concepts and principles that have always been difficult to understand and controversial in their interpretation. This book aims to explain these issues using a minimum of technical language and mathematics. After a brief introduction to the ideas of quantum physics, the problems of interpretation are identified and explained. The rest of the book surveys, describes and criticises a range of (...) suggestions that have been made with the aim of resolving these problems; these include the traditional, or 'Copenhagen' interpretation, the possible role of the conscious mind in measurement, and the postulate of parallel universes. This new edition has been revised throughout to take into account developments in this field over the past fifteen years, including the idea of 'consistent histories' to which a completely new chapter is devoted. (shrink)

What ecological advantages do animals gain by being able to detect, extract and exploit wavelength information? What are the advantages of representing that information as hue qualities? The benefits of adding chromatic to achromatic vision, marginal in object detection, become apparent in object recognition and receiving biological signals. It is argued that this improved performance is a direct consequence of the fact that many animals' visual systems reduce wavelength information to combinations of four basic hues. This engenders a simple categorical (...) scheme that permits a rich amount of sensory information to be rapidly and efficiently employed by cognitive machinery of limited capacity. (shrink)

According to illusionism, phenomenal consciousness is an introspective illusion. The illusion problem is to explain the cause of the illusion, or why we are powerfully disposed to judge—erroneously—that we are phenomenally conscious. I propose a theory to solve the illusion problem. I argue that on the basis of three hypotheses about the mind—which I call introspective opacity, the infallibility intuition, and the justification constraint—we can explain our disposition, on introspection, to draw erroneous unconscious inferences about our (...) sensory states. Being subject to the illusion of phenomenal consciousness consists in having this disposition. I explain our ‘problem intuitions’ about consciousness —that our sensory states bear phenomenal properties that are qualitatively like something with which we are directly acquainted that is ineffable, atomic, intrinsic, private, and non-physical. I also address the illusion meta-problem, which is to explain why illusionism seems especially counterintuitive. (shrink)

The purpose of this paper is to defend what I call the action-oriented coding theory (ACT) of spatially contentful visual experience. Integral to ACT is the view that conscious visual experience and visually guided action make use of a common subject-relative or 'egocentric' frame of reference. Proponents of the influential two visual systems hypothesis (TVSH), however, have maintained on empirical grounds that this view is false (Milner & Goodale, 1995/2006; Clark, 1999; 2001; Campbell, 2002; Jacob & Jeannerod, 2003; Goodale & (...) Milner, 2004). One main source of evidence for TVSH comes from behavioral studies of the comparative effects of size-contrast illusions on visual awareness and visuo- motor action. This paper shows that not only is the evidence from illusion studies inconclusive, there is a better, ACT-friendly interpretation of the evidence that avoids serious theoretical difficulties faced by TVSH. (shrink)

The rubber hand illusion is one of the most commonly used paradigms to examine the sense of body ownership. Touches are synchronously applied to the real hand, hidden from view, and a false hand in an anatomically congruent position. During the illusion one may perceive that the feeling of touch arises from the false hand, and that the false hand is one's own. The relationship between referral of touch and body ownership in the illusion is unclear, and (...) some articles average responses to statements addressing these experiences, which may be inappropriate depending on the research question of interest. To address these concerns, we re-analyzed three freely available datasets to better understand the relationship between referral of touch and feeling of ownership in the RHI. We found that most participants who report a feeling of ownership also report referral of touch, and that referral of touch and ownership show a moderately strong positive relationship that was highly replicable. In addition, referral of touch tends to be reported more strongly and more frequently than the feeling of ownership over the hand. The former observations confirm that referral of touch and ownership are related experiences in the RHI. The latter, however, indicate that when pooling the statements one may obtain a higher number of illusion ‘responders’ compared to considering the ownership statements in isolation. These results have implications for the RHI as an experimental paradigm. (shrink)

The American Journal of Bioethics, Volume 12, Issue 6, Page 44-45, June 2012.

A number of philosophers have recently argued that consciousness properties are identical with some set of physical or functional properties and that we can explain away the frequently felt puzzlement about this claim as a delusion or confusion generated by our different ways of apprehending or thinking about consciousness. This paper examines David Papineau’s influential version of this view. According to Papineau, the difference between our “phenomenal” and “material” concepts of consciousness produces an instinctive but erroneous intuition that these concepts (...) can’t co-refer. I claim that this account fails. To begin with, it is arguable that we are mystified about physicalism even when the account predicts that we shouldn’t be. Further, and worse, the account predicts that an “intuition of distinctness” will arise in cases where it clearly does not. In conclusion, I make some remarks on the prospects for, constraints on, and alternatives to, a successful defence of the claim. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Royce, Racism, and the Colonial IdealWhite Supremacy and the Illusion of Civilization in Josiah Royce's Account of the White Man's Burden1Tommy J. CurryNo colony can be made by a theory of Imperialism, it can only be made by people who want to colonize and are capable of maintaining themselves as colonists.—Sir Sydney OlivierIntroductionAs with most historic white figures in philosophy, their repopularization and reintroduction into contemporary circles commits (...) their work, regardless of its initial silence, to speak to the problem of anti-Black racism in America. Josiah Royce is no different in this regard. In recent years, white scholars like Jacquelyn Kegley and Shannon Sullivan have introduced revisions to Royce's thought that make it appear multicultural and antiracist, despite the anachronism of such a contention. According to Kegley, "Royce believes, as others in the contemporary scene, that 'race' as a concept cannot be eliminated, [because] it plays too crucial a role, both positive and negative, in self- and social identification" (216). While Kegley is correct that contemporary scholars like Lucius Outlaw and Cornel West have adamantly defended the importance of race as a social and cultural entity, her claim is in stark contradiction to the racial eliminativism of other scholars like Anthony Appiah and Alain Locke, whom she also contends that Royce agrees with simultaneously.2 While it makes perfect sense for Kegley to try to put Royce in conversation with contemporary Black thinkers in race theory, her work is indicative of a trend aiming to gain currency for historic white thinkers in current race debates at the expense of historical accuracy. Black scholars who studied under Royce and applied his theories to the race problem from the mid-1900s onward, like William H. Ferris3 and William T. Fontaine,4 are ignored by white scholars because the first application of Roycean philosophy supported assimilationism. It is only today with the political and ideological [End Page 10] ethicizations of racial diversity and multiculturalism that Royce's work is interpreted as critically conserving race.5In contrast to contemporary works on Royce and race, this article seeks to evaluate the current claims for the relevance of Royce's views in contemporary debates on race. I maintain that only by taking Royce out of his historical context (late nineteenth-and early twentieth-century thought) do his ideas on race acquire a level of importance that cannot be supported by the actual evidence he himself advances. Conversely, by actually placing Royce in his historical context, this article will demonstrate that Royce's 1905 article entitled "Race Questions" (later published as "Race Questions and Prejudices" in 1906) is an unapologetic extension of his 1900 article entitled "Characteristic Tendencies of American Civilization," where Royce adamantly champions British colonialism and assimilation as the remedy to the burgeoning race problem both at home and abroad. I begin with a critical analysis that places Josiah Royce's attitudes firmly within the boundaries of his times. In what follows, I will attempt to contextualize Royce's seemingly progressive stance on Japan as part of a more general reaction whites had during the early 1900s to Russia's defeat by the Japanese. Instead of reading Royce's stance on Japan as a moment of exceptionalism, I contend that Royce's attitude was in fact a popular disposition that signaled the inevitable shift of race science away from biological determinism toward more environmentalist explanations. Secondly, and perhaps more importantly, I will show that Royce's disposition toward Blacks was firmly rooted in a colonial and assimilationist logic that ultimately sought the cultural destruction of African-descended people. A closer look at Royce's prefatory remarks on British colonialism from 1900 and his valorization of English colonial administration in Jamaica actually reveals an insidious racial dynamic in Royce's thought that is anything but antiracist. Finally, having established Royce's philosophical stake in American assimilation and Western domination, I argue that the "provincial revision" currently in vogue amongst American philosophers working with Royce is simply not enough to overturn Royce's clearly racist investments in dealing with the race question.If I Can Think It... Then I Can Do It—Reading Royce... (shrink)

How do we acquire a mental representation of our own face? Recently, synchronous, but not asynchronous, interpersonal multisensory stimulation between one’s own and another person’s face has been used to evoke changes in self-identification . We investigated the conscious experience of these changes with principal component analyses that revealed that while the conscious experience during synchronous IMS focused on resemblance and similarity with the other’s face, during asynchronous IMS it focused on multisensory stimulation. Analyses of the identified common factor structure (...) revealed significant quantitative differences between synchronous and asynchronous IMS on self-identification and perceived similarity with the other’s face. Experiment 2 revealed that participants with lower interoceptive sensitivity experienced stronger enfacement illusion. Overall, self-identification and body-ownership rely on similar basic mechanisms of multisensory integration, but the effects of multisensory input on their experience are qualitatively different, possibly underlying the face’s unique role as a marker of selfhood. (shrink)

The dissociation Block provides between phenomenal and access consciousness (P-consciousness and A-consciousness) captures much of our intuition about conscious experience. However, it raises a major methodological puzzle, and is not uniquely supported by the empirical evidence. We provide an alternative interpretation based on the notion of levels of representation and partial awareness.

Could the standard interpretation of Gettier cases reflect a fundamental confusion? Indeed so. How well can epistemologists argue for the truth of that standard interpretation? Not so well. A methodological mistake is allowing them not to notice how they are simply (and inappropriately) being infallibilists when regarding Gettiered beliefs as failing to be knowledge. There is no Gettier problem that we have not merely created for ourselves by unwittingly being infallibilists about knowledge.

Following the pattern set by the early German Romantics, Kierkegaard conveys many of his insights through literature rather than academic prose. What makes him a valuable member of this tradition is the theory he develops to support it, his so-called “theory of indirect communication.” The most exciting aspect of this theory concerns the alleged importance of indirect communication: Kierkegaard claims that there are some projects only it can accomplish. This paper provides a critical account of two arguments Kierkegaard offers in (...) defense of this claim. The first argument is that he needs to use indirect communication in order to discourage people from losing themselves in the “crowd”. The second argument is that he needs to use it in order to help people out of a “monstrous illusion”. It is shown that while both arguments justify Kierkegaard’s decision to use indirect communication, neither one supports the original claim about its indispensability. (shrink)

‘You can’t stop progress’, we are endlessly told. But what is meant by “progress”? What is “progress” toward? We are rarely told. Human flourishing? And a culture? That would be a good start – but rarely seems a criterion for ‘progress’. Rather, ‘progress’ is simply a process, that we are not allowed, apparently, to stop. Or rather: it would be futile to seek to stop it. So that we are seemingly-deliberately demoralised into giving up even trying.Questioning the myth of ‘progress’, (...) and seeking to substitute for it the idea of real progress – progress which is actually assessed according to some independent not-purely-procedural criteria – is a vital thing to do, at this point in history. Literally: life, or at least civilisation, and thus culture, may depend on it.Once we overcome the myth of ‘progress’, we can clear the ground for a real politics that would jettison the absurd hubris of liberalism and of most ‘Leftism’. And would jettison the extreme Prometheanism and lack of precaution endemic to our current pseudo-democratic technocracy. The challenge is to do so in a way that does not fall into complete pessimism or into an endorsement of the untenable and unsavoury features of conservatism. The challenge, in other words, is to generate an ideology or philosophy for our time, that might yet save us, and ensure that we are worth saving.This paper is then a kind of reading of Wittgenstein’s crucial aphorism on this topic: ‘Our civilization is characterized by the word progress. Progress is its form rather than making progress being one of its features.’. (shrink)