We show that true colors as defined by Chevreul (1839) produce unsuspected simultaneous brightness induction effects on their immediate grey backgrounds when these are placed on a darker (black) general background surrounding two spatially separated configurations. Assimilation and apparent contrast may occur in one and the same stimulus display. We examined the possible link between these effects and the perceived depth of the color patterns which induce them as a function of their luminance contrast. Patterns of square-shaped inducers of a (...) single color (red, green, blue, yellow, or grey) were placed on background fields of a lighter and a darker grey, presented on a darker screen. Inducers were always darker on one side of the display and brighter on the other in a given trial. The intensity of the grey backgrounds varied between trials only. This permitted generating four inducer luminance contrasts, presented in random order, for each color. Background fields were either spatially separated or consisted of a single grey field on the black screen. Experiments were run under three environmental conditions: dark-adaptation, daylight, and rod-saturation after exposure to bright light. In a first task, we measured probabilities of contrast, assimilation, and no effect in a three-alternative forced-choice procedure (background appears brighter on the ‘left’, on the ‘right’ or the ‘same’). Visual adaptation and inducer contrast had no significant influence on the induction effects produced by colored inducers. Achromatic inducers produced significantly stronger contrast effects after dark-adaptation, and significantly stronger assimilation in daylight conditions. Grouping two backgrounds into a single one was found to significantly decrease probabilities of apparent contrast. Under the same conditions, we measured probabilities of the inducers to be perceived as nearer to the observer inducers. These, as predicted by Chevreul’s law of contrast, were determined by the luminance contrast of the inducers only, with significantly higher probabilities of brighter inducers to be seen as nearer, and a marked asymmetry between effects produced by inducers of opposite sign. Implications of these findings for theories which attempt to link simultaneous induction effects to the relative depth of object surfaces in the visual field are discussed. (shrink)

Poorly saturated colors are closer to a pure grey than strongly saturated ones and, therefore, appear less “colorful”. Color saturation is effectively manipulated in the visual arts for balancing conflicting sensations and moods and for inducing the perception of relative distance in the pictorial plane. While perceptual science has proven quite clearly that the luminance contrast of any hue acts as a self-sufficient cue to relative depth in visual images, the role of color saturation in such figure-ground organization has remained (...) unclear. We presented configurations of colored inducers on grey ‘test’ backgrounds to human observers. Luminance and saturation of the inducers was uniform on each trial, but varied across trials. We ran two separate experimental tasks. In the relative background brightness task, perceptual judgments indicated whether the apparent brightness of the grey test background contrasted with, assimilated to, or appeared equal (no effect) to that of a comparison background with the same luminance contrast. Contrast polarity and its interaction with color saturation affected response proportions for contrast, assimilation and no effect. In the figure-ground task, perceptual judgments indicated whether the inducers appeared to lie in front of, behind, or in the same depth with the background. Strongly saturated inducers produced significantly larger proportions of foreground effects indicating that these inducers stand out as figure against the background. Weakly saturated inducers produced significantly larger proportions of background effects, indicating that these inducers are perceived as lying behind the backgrounds. We infer that color saturation modulates figure-ground organization, both directly by determining relative inducer depth, and indirectly, and in interaction with contrast polarity, by affecting apparent background brightness. The results point towards a hitherto undocumented functional role of color saturation in the genesis of form, and in particular figure-ground percepts in the absence of chromatostereopsis. (shrink)

The laws which predict how the perceptual quality of figure-ground can be extracted from the most elementary visual signals were discovered by the Gestaltists, and form an essential part of their movement (see especially Metzger, 1930, and Wertheimer, 1923 translated and re-edited by Lothar Spillmann, 2009 and 2012, respectively). Distinguishing figure from ground is a prerequisite for perception of both form and space (the relative positions, trajectories, and distances of objects in the visual field. The human brain has an astonishing (...) capacity for selecting and combining a few critical visual signals to accurately represent both form and space. (shrink)

Victor Vasarely's (1906–1997) important legacy to the study of human perception is brought to the forefront and discussed. A large part of his impressive work conveys the appearance of striking three-dimensional shapes and structures in a large-scale pictorial plane. Current perception science explains such effects by invoking brain mechanisms for the processing of monocular (2D) depth cues. Here in this study, we illustrate and explain local effects of 2D color and contrast cues on the perceptual organization in terms of figure-ground (...) assignments, i.e. which local surfaces are likely to be seen as “nearer” or “bigger” in the image plane. Paired configurations are embedded in a larger, structurally ambivalent pictorial context inspired by some of Vasarely's creations. The figure-ground effects these configurations produce reveal a significant correlation between perceptual solutions for “nearer” and “bigger” when other geometric depth cues are missing. In consistency with previous findings on similar, albeit simpler visual displays, a specific color may compete with luminance contrast to resolve the planar ambiguity of a complex pattern context at a critical point in the hierarchical resolution of figure-ground uncertainty. The potential role of color temperature in this process is brought forward here. Vasarely intuitively understood and successfully exploited the subtle context effects accounted for in this paper, well before empirical investigation had set out to study and explain them in terms of information processing by the visual brain. (shrink)

Less salient, lower contrast disks appear to be more numerous than more salient, higher contrast disks when intermingled in equal numbers into the same display, but they are equal in perceived numerosity when segregated into different displays. Comparative judgements indicate that the apparent numerosity of the lower contrast disks is unaffected by being intermingled with high contrast disks, whereas the high contrast disks are reduced in numerosity by being intermingled with the low contrast ones. Here, we report that this illusion (...) also occurs for absolute judgements of the numerosities of displays of from 20 to 80 disks. A model based on luminance-difference contrast normalization explains the illusory loss of high-contrast items along with veridical perception of the low-contrast ones. The model correctly predicts that perceived numerosity is linearly related to the square-root of the number of disks, with the extent of the illusion depending on an attentionally-weighted function of contrast and assimilation. (shrink)

Color vision provides accurate measures of the phase and intensity of daylight, and also a means of discriminating between objects. Neither property implies that objects are colored.

The 18th-century Scottish ‘common sense’ philosopher Thomas Reid argued that perception can be distinguished on several dimensions from other categories of experience, such as sensation, illusion, hallucination, mental images, and what he called ‘fancy.’ We extend his approach to eleven mental categories, and discuss how these distinctions, often ignored in the empirical literature, bear on current research. We also score each category on five properties (ones abstracted from Reid) to form a 5 × 11 matrix, and thus can generate statistical (...) measures of their mutual dependencies, a procedure that may have general interest as illustrating what we can call ‘computational philosophy.’. (shrink)

Psychophysical scales can be constructed under suitable restrictions from appropriate data, but they still do not justify privileged internal sensations.

The “Perky effect” is the interference of visual imagery with vision. Studies of this effect show that visual imagery has more than symbolic properties, but these properties differ both spatially (including “pictorially”) and temporally from those of vision. We therefore reject both the literal picture-in-the-head view and the entirely symbolic view.

Adam Smith writes favorably about innovation in Wealth of Nations while writing unfavorably about a figure associated with innovation: the projector. His criticism of projectors prompts many scholars to claim that Smith disapproves of entrepreneurship. But Smith criticizes the projector not because he acts as an entrepreneur but because he fails to meet Smith’s moral standards for entrepreneurship. In Theory of Moral Sentiments, Smith conceives of a framework for moral entrepreneurship based on prudence. The framework consists of two principles: (...) first, approach everyday matters with the general “tenor of conduct” that governs your life and trade, and second, approach life-changing matters with prudence and justice. Recognizing that Smith is concerned with the total effect that an entrepreneurial venture has on society beyond its immediate profits opens the door to engage with contemporary research that studies the ethical and moral externalities of entrepreneurship. (shrink)

In a brief article under the present title, Adam Parry raised a simple but profound question: were there certain things that the inherited vocabulary of oral poets did not allow them to sayF; The mere raising of this question, whatever his answer, is enough to make the article one of the more important contributions to Homeric studies in the last fifty years. As it happens, his answer was affirmative, and it has not been contested. Contested it will now be.

In a brief article under the present title, Adam Parry raised a simple but profound question: were there certain things that the inherited vocabulary of oral poets did not allow them to sayF; The mere raising of this question, whatever his answer, is enough to make the article one of the more important contributions to Homeric studies in the last fifty years. As it happens, his answer was affirmative, and it has not been contested. Contested it will now be.

_Rhetoric_ is the sixth volume in The New Hackett Aristotle series, a series featuring translations, with Introductions and Notes, by C. D. C. Reeve, Delta Kappa Epsilon Distinguished Professor of Philosophy at The University of North Carolina at Chapel Hill. The series will eventually include all of Aristotle's works.

Aristotle on Practical Wisdom is the first full-scale commentary on Nicomachean Ethics VI to be issued in a century, and the most illuminating ever. A meticulous translation with facing-page analysis enables readers to engage directly with Aristotle's account, while the lucid introduction locates it in the context of his—and later—ethical thought.

The contemporary astrophysicist today deals with questions that bear on the area known to traditional philosophy as “metaphysics.” Consequently, it is tempting to cross the threshold. One can allow oneself to be tempted by the idea that science is in a position to provide solutions to ancient and venerable metaphysical quests. One can even imagine, according to the wish expressed two thousand years ago by Epicurus, that it can calm our “metaphysical anxieties.”.

This book shows you what it is like to think along with Aristotle and helps you to see the universe and our place in it as he thought they had to be seen to be scientifically intelligible. As a portrait is composed of colors and shapes that collectively represent someone, so Aristotles works are composed of arguments that collectively represent the causal structure of the universe, from the stones, plants, and animals around us to the starry heavens above and the (...) god beyond them. The aim of this brief immersion is to guide you through those arguments in a way that lets you understand for yourself why they proceed as they do and end where they do."--Publisher. (shrink)

Scatological shock-merchants, untrained social workers, conflict-zone tourists: from a certain standpoint the relationship between contemporary art and ethics involves a string of negative conjunctions. At their center stands the artist, whose personality and intentions often serve as an ethical measure of the work. This book operates on the basis of a different premise: that artworks themselves have ethical effects, and looking at these effects can tell us about wider processes of social change. As the first full-length study of its kind (...) to outline a positive vision of the ethics of contemporary art, this book distances itself from previous accounts that focus on transgression. The critique of transgressive art is not made on the basis that it is wrong, but that it no longer succeeds on its own terms in societies where language, prohibition and morality are more plastic than they once were. By drawing on the work of Félix Guattari and Jacques Lacan, the book develops a novel theoretical framework that emphasizes the effect of art on subjectivity. Along the way artworks by Kader Attia, Artur Zmijewski, Dora Garcia and others serve as springboards launching discussions of the varied pathways along which a renewed ethics of contemporary art might develop. (shrink)

"It is... remarkable that Reeve's is the first new English translation since Fowler's Loeb edition of 1926. Fortunately, Reeve has done an excellent job. His version is not slavishly literal but is in general very accurate. It is also very clear and readable. Reeve is particularly to be congratulated for having produced versions of some of the more torturous passages, which are not only faithful to the text but also make good sense in English. The long and detailed introduction is (...) worth reading in its own right." --R. F. Stalley, _The Classical Review_. (shrink)

When one encounters disagreement about the truth of a factual claim from a trusted advisor who has access to all of one's evidence, should that move one in the direction of the advisor's view? Conciliatory views on disagreement say "yes, at least a little." Such views are extremely natural, but they can give incoherent advice when the issue under dispute is disagreement itself. So conciliatory views stand refuted. But despite first appearances, this makes no trouble for *partly* conciliatory views: views (...) that recommend giving ground in the face of disagreement about many matters, but not about disagreement itself. (shrink)

The claim of this paper is that the everyday functions of knowledge make most sense if we see knowledge as contrastive. That is, we can best understand how the concept does what it does by thinking in terms of a relation “a knows that p rather than q.” There is always a contrast with an alternative. Contrastive interpretations of knowledge, and objections to them, have become fairly common in recent philosophy. The version defended here is fairly mild in that there (...) is no suggestion that we cannot think in terms of a simpler not explicitly contrastive relation “a knows that p.” Some, for instance Schaffer (2005) and Karjalainen and Morton (2003), have hinted that this stronger possibility may be right. But all that I am arguing now is that facts that are easily expressed in contrastive terms are vital to understanding why we need the concept of knowledge. In a piece that is in some ways a companion to this one ("Contrastivism" in Duncan Pritchard and Sven Bernecker, eds. The Routledge Companion to Epistemology. Routledge 2010, 513-522), I give a general survey of theories of contrastive knowledge and the differences between them. (shrink)

In the morning -- After school -- Time for bed -- My smart choices -- Glossary -- Index -- About the author.

Friends are fun -- Let's play -- Choose good friends -- My smart choices -- Glossary -- Index -- About the author.

Many favor representationalism about color experience. To a first approximation, this view holds that experiencing is like believing. In particular, like believing, experiencing is a matter of representing the world to be a certain way. Once you view color experience along these lines, you face a big question: do our color experiences represent the world as it really is? For instance, suppose you see a tomato. Representationalists claim that having an experience with this sensory character is necessarily connected with representing (...) a distinctive quality as pervading a round area out there in external space. Let us call it “sensible redness” to highlight the fact that the representation of this property is necessarily connected with the sensory character of the experience. Is this property, sensible redness, really co-instantiated with roundness out there in the space before you? (shrink)

The demand for female labor is a central explanatory component of macrostructural theories of gender stratification. This study analyzes how the structural demand for female labor affects gender differences in labor force participation. The authors develop a measure of the gendered demand for labor by indexing the degree to which the occupational structure is skewed toward usually male or female occupations. Using census data from 1910 through 1990 and National Longitudinal Sample of Youth data from 261 contemporary U.S. labor markets, (...) the authors show that the gender difference in labor force participation covaries across time and space with this measure of the demand for female labor. (shrink)

In order to predict and explain behavior, one cannot specify the mental state of an agent merely by saying what information she possesses. Instead one must specify what information is available to an agent relative to various purposes. Specifying mental states in this way allows us to accommodate cases of imperfect recall, cognitive accomplishments involved in logical deduction, the mental states of confused or fragmented subjects, and the difference between propositional knowledge and know-how .

Some philosophical theories of the nature of color aim to respect a "common sense" conception of color: aligning with the common sense conception is supposed to speak in favor of a theory and conflicting with it is supposed to speak against a theory. In this paper, we argue that the idea of a "common sense" conception of color that philosophers of color have relied upon is overly simplistic. By drawing on experimental and historical evidence, we show how conceptions of color (...) vary along several dimensions and how even supposedly "core" components of the contemporary "common sense" conception of color are less stable than they have been thought to be. (shrink)

I examine the status of Aristotle’s science of soul and argue that it is trans-generic in the way that Aristotle's universal mathematics is. For just as the branches of the latter differ considerably, so too do the sciences of life: botany, zoology, psychology, and (in Aristotle’s view) astronomy and theology. Discovering the correct definition of soul, which is their starting point or first principle, as with other scientific starting points, involves both induction and dialectic. Induction uses scientific observation of living (...) things to move toward this starting point. Dialectic enables the scientist to assemble endoxa, or reputable beliefs, that allow us to solve each puzzle (aporia) that clouds our understanding (nous) of the starting point that induction enables us to reach. (shrink)

In this paper, I do a few things. I develop a (largely) empirical argument against naïve realism (Campbell, Martin, others) and for representationalism. I answer Papineau’s recent paper “Against Representationalism (about Experience)”. And I develop a new puzzle for representationalists.

Quantum mechanics is humanity's finest scientific achievement. It explains why the sun shines and how your eyes can see. It's the theory behind the LEDs in your phone and the nuclear hearts of space probes. Every physicist agrees quantum physics is spectacularly successful. But ask them what quantum physics means, and the result will be a brawl. At stake is the nature of the Universe itself. What does it mean for something to be real? What is the role of consciousness (...) in the Universe? And do quantum rules apply to very small objects like electrons and protons, but not us? In What is Real?, Adam Becker brings to vivid life the brave researchers whose quest for the truth led them to challenge Bohr: David Bohm, who picked up Einstein's mantle and sought to make quantum mechanics deterministic, all while being hounded by the forces of McCarthyism; Hugh Everett, who argued that everything, big and small, must be governed by the same rules; and John Bell, who went to great lengths to eradicate the power of the god-like observer from the core of quantum physics. And they paid dearly, their reputations, careers, and sometimes lives ruined completely. But history has been kinder to them than their contemporaries were. As Becker shows, the brave intellectual giants have inspired a growing army of physicists and philosophers intent both on making a philosophically more satisfying theory of the universe and a more useful one as well. A gripping story of some of humanity's greatest ideas and the high cost with which many have pursued them, What is Real? is intellectual history at its passionate best. (shrink)

The Carol J. Adams Reader gathers together Adams's foundational and recent articles in the fields of critical studies, animal studies, media studies, vegan studies, ecofeminism and feminism, as well as relevant interviews and conversations in which Adams identifies key concepts and new developments in her decades-long work. This volume, a companion to The Sexual Politics of Meat (Bloomsbury Revelations), offers insight into a variety of urgent issues for our contemporary world: Why do batterers harm animals? What is the relationship between (...) genocide and attitudes toward other animals? How do activism and theory feed each other? How do race, gender, and species categories interact in strengthening oppressive attitudes? In clear language, Adams identifies the often hidden aspects of cultural presumptions. The essays and conversations found here capture the decades-long energy and vision that continue to shape new ways of thinking about and responding to oppression. (shrink)

This new translation of _On Coming to Be and Passing Away _and_ Meteorology 1 and 4_ fits seamlessly with the other volumes in the New Hackett Aristotle Series, enabling Anglophone readers to study these works in a way previously not possible. The Introduction describes the book that lies ahead, explaining what it is about, what it is trying to do, how it goes about doing it, and what sort of audience it presupposes. Sequentially numbered, cross-referenced endnotes provide the information most (...) needed at each juncture, while a detailed Index indicates the places where focused discussion of key notions occurs. (shrink)

How best to think about quantum systems under permutation invariance is a question that has received a great deal of attention in the literature. But very little attention has been paid to taking seriously the proposal that permutation invariance reflects a representational redundancy in the formalism. Under such a proposal, it is far from obvious how a constituent quantum system is represented. Consequently, it is also far from obvious how quantum systems compose to form assemblies, i.e. what is the formal (...) structure of their relations of parthood, overlap and fusion. In this paper, I explore one proposal for the case of fermions and their assemblies. According to this proposal, fermionic assemblies which are not entangled—in some heterodox, but natural sense of ‘entangled’—provide a prima facie counterexample to classical mereology. This result is puzzling; but, I argue, no more intolerable than any other available interpretative option. (shrink)

The problem of trust in social relationships was central to the emergence of the modern form of civil society and much discussed by social and political philosophers of the early modern period. Over the past few years, in response to the profound changes associated with postmodernity, trust has returned to the attention of political scientists, sociologists, economists, and public policy analysts. In this sequel to his widely admired book, The Idea of Civil Society, Adam Seligman analyzes trust as a (...) fundamental issue of our present social relationships. Setting his discussion in historical and intellectual context, Seligman asks whether trust--which many contemporary critics, from Robert Putnam through Francis Fukuyama, identify as essential in creating a cohesive society--can continue to serve this vital role. Seligman traverses a wide range of examples, from the minutiae of everyday manners to central problems of political and economic life, showing throughout how civility and trust are being displaced in contemporary life by new "external' system constraints inimical to the development of trust. Disturbingly, Seligman shows that trust is losing its unifying power precisely because the individual, long assumed to be the ultimate repository of rights and values, is being reduced to a sum of group identities and an abstract matrix of rules. The irony for Seligman is that, in becoming postmodern, we seem to be moving backward to a premodern condition in which group sanctions rather than trust are the basis of group life. (shrink)

Discusses recent work on representationalism, including: the case for a representationalist theory of consciousness, which explains consciousness in terms of content; rivals such as neurobiological type-type identity theory (Papineau, McLaughlin) and naive realism (Allen, Campbell, Brewer); John Campbell and David Papineau's recent objections to representationalism; the problem of the "laws of appearance"; externalist vs internalist versions of representationalism; the relation between representationalism and the mind-body problem.

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 39.3 (2001) 453-454 [Access article in PDF] Gregory Fried. Heidegger's Polemos: From Being to Politics. New Haven: Yale University Press, 2000. Pp. xvi + 302. Cloth, $35.00. That an outstanding philosopher could align himself with a monstrous ideology has always been a scandalous puzzle: but since Farias's Heidegger and Nazism (1989), it is impossible to dismiss Heidegger's "political episode" as the reprehensible but (...) forgivable lapse of a backwoods academic without political sense. Learning that Heidegger not only was a dedicated Nazi, but engineered a postwar cover-up of his involvement, was for many Heideggereans like entering a beloved office and finding swastikas spraypainted over everything. Consternation has hardly died down in the years since. Philosophers have struggled either to repudiate Heidegger's thought entirely or argue that the parts of it he pledged to Nazism were inconsistent with the rest. It isn't that such people deny (or not out loud) what would seem to be an obvious fact: that a bad man can be a good philosopher. They fear that something in Heidegger's thinking somehow "entails" fascism. A dilemma gets set up: either Heidegger's philosophy is contaminated by his actions, or to engage in those actions, Heidegger must have ignored his philosophy.Fried's book on polemos in Heidegger navigates between these horns: on the one hand, Fried dismisses as "absurd" any simple claim that Heidegger's work entails fascism (5), but on the other hand, he attempts to trace, throughout Heidegger's "middle period" (roughly Being and Time to the end of World War II), a notion he believes is consistent with embracing Nazism, not to argue that Heidegger's political decisions were correct or unavoidable, but that they were predictable—though fatally hubristic—responses to the European situation as Heidegger saw it. More, Fried wants to endorse Heidegger's understanding of polemos as valuable for politics today, not because it is insulated against fascism but because fascism is still a possibility we need to confront, even while we attempt to preserve Enlightenment ideals and liberal-democratic institutions in a "nihilistic" world.Heidegger bases his views about polemos ("struggle," "confrontation") on Heraclitus Fragment 53, where it is called "father and king of all." As he explores Heidegger's [End Page 453] treatment, Fried stresses that "what is of interest is not whether Heidegger's interpretations are philologically correct, but rather how these readings shed light on his own way of making sense of history and of politics" (29). And "confrontation" is the closest thing to a consistent political doctrine in Heidegger. He understands it as a respectful opposition that allows each "side" to appear in all its validity and therefore potential risk to the other "side." Confrontation is a principle of interpretation, dialogue between individuals, and interaction between nations (see 79-80). Fried insists that this idea is a crucial part of a number of central Heideggerean concepts, as well as how Heidegger viewed his own task, and Germany's, when National Socialism appeared with its promise of a new spiritual mission for the German Volk. That Heidegger's "romantic" hopes in Nazism were unfounded does not diminish the usefulness of his work on polemos, Fried thinks, because "postmodernist" thinkers, molded by Heidegger, have nothing better to offer as they "confront" the dying or dead "modern" world with dreams of a new society. Some respect for "liberal" values will still be necessary if postmodernist "deconstruction" of oppressive structures is not to leave inroads for new, opportunistic forms of fascism.Fried's is an important study, by a sympathetic but undazzled scholar of Heidegger, of a concept that may be as basic and fruitful as he claims: but his insistence on making everything in "middle Heidegger" depend on it causes him in many places to conflate separate projects and periods in Heidegger's work that were better left distinct. He is particularly unconvincing when he suggests (e.g., 59, 100, 116) that for Heidegger, human beings can "lose their Dasein" and become "unbeings" to whom "Being is... (shrink)

The foundation for a system of morals, this 1749 work is a landmark of moral and political thought. Its highly original theories of conscience, moral judgment, and virtue offer a reconstruction of the Enlightenment concept of social science, embracing both political economy and theories of law and government.

A scholarly edition of a work by Adam Smith. The edition presents an authoritative text, together with an introduction, commentary notes, and scholarly apparatus.