Online research in philosophy

In this book Gerald Vision argues for a new causal theory, one that engages provocatively with direct realism and makes no use of a now discredited subjectivism.

The evidence of blindsight is occasionally used to argue that we can see things, and thus have perceptual belief, without the distinctive visual awareness accompanying normal sight; thereby displacing phenomenality as a component of the concept of vision. I maintain that arguments to this end typically rely on misconceptions about blindsight and almost always ignore associated visual (or visuomotor) pathologies relevant to the lessons of such cases. More specifically, I conclude, first, that the phenomena very likely do not result (...) from dissociations within a single system, but from the interaction of evolutionarily distinct, if interacting, systems; second, that a closer study of spared motor abilities indicates that verbal responses of patients result not from degraded vision but from proprioception; and, finally, above chance verbal responses, being forced guesses, are not tentative beliefs and cannot become beliefs just by training patients to have more confidence in their responses. (shrink)

Pylyshyn argues that early vision is cognitively impenetrable, and therefore – contrary to knowledge-based theories of perception – that perception is noncontinuous with cognition. Those processes that are included in “early vision,” however, represent at best only one component of perception, and it is important that it is not the component with which most knowledge-based theories are concerned. Pylyshyn's analysis should be taken as a possible source of refinement of knowledge-based theories of perception, rather than as (...) a condemnation of them. (shrink)

Pylyshyn's concentration on form perception to demonstrate that early vision is cognitively impenetrable neglects that color perception is also part of early vision. Thus, the finding of Duncker (1939), Bruner et al. (1951), and Delk and Fillenbaum (1965) that the expected color of objects affects how they are perceived challenges Pylyshyn's thesis.

I elaborate on Pylyshyn's definition of the cognitive impenetrability (CI) of early vision, and draw on the role of concepts in perceptual processing, which links the problem of the CI or cognitive penetrability (CP) of early vision with the problem of the nonconceptual content (NCC) of perception. I explain, first, the sense in which the content of early vision is CI and I argue that if some content is CI, it is conceptually encapsulated, that (...) is, it is NCC. Then, I examine the definitions of NCC and argue that they lead to the view that the NCC of perception is retrieved in a stage of visual processing that is CI. Thus, the CI of a state and content is a sufficient and necessary condition for the state and its content to be purely NCC, the CI?≡?NCC thesis. Since early vision is CI, the purely NCC of perception is formed in early vision. I defend the CI?≡?NCC thesis by arguing against objections raised against both the sufficient and the necessary part of the thesis. (shrink)

It has recently been demonstrated that early vision is capable of recovering several properties of the three-dimensional world. We describe a series of visual search experiments showing that such recovery includes a completion process that allows for the interpretation of objects that are partially occluded. Search for easily-detectable line segments is made much more difficult when they can be interpreted as the visible parts of a line that has been occluded by a three-dimensional object. We describe some of (...) the conditions under which this completion process takes place, such as its dependence on orientation, contrast, and spacing. We then show that fragments of three-dimensional objects can be completed in a similar way. These results extend what is known about rapid parallel scene interpretation -- in addition to assigning scene-based properties to image elements, early vision also constructs elements not present in the original image. (shrink)

Although some types of cognition may not affect early vision, there is ample evidence that other types of cognition do. Evidence indicating that early vision is penetrable by direct manipulation of viewers' perceptual intentions and by knowledge of the structure of familiar objects is reviewed, and related to both the Pylyshyn target article and Fodor (1983).

The perception of the lightness of surfaces has been shown to be affected by information about the spatial configuration of those surfaces and their illuminants. For example, two surfaces of equal luminance can appear to be of very different lightness if one of the two appears to lie in a shadow. How are we to understand the character of the processes that integrate such spatial configuration information so as to yield the eventual appearance of lightness? This paper makes some simple (...) observations about the vocabulary of appearance used in these contexts, and proposes that the end results can be called "phenomenal" in a traditional sense of that word. Processes whose products are phenomenal are next distinguished from processes characterized in other terms: (a) processes of perceptual grouping; (b) processes of perceptual organization; and (c) attentional (as opposed to preattentive) processes. These four categories are conceptually and empirically distinct. In particular, the paper reviews some evidence that appearances as of contours, occlusion, and amodally completed shapes can occur preattentively. Some implications for understanding gestalt grouping processes are briefly discussed. (shrink)

My aim in this paper is to defend the view that the processes underlying early vision are informationally encapsulated. Following Marr (1982) and Pylyshyn (1999) I take early vision to be a cognitive process that takes sensory information as its input and produces the so-called primal sketches or shallow visual outputs: informational states that represent visual objects in terms of their shape, location, size, colour and luminosity. Recently, some researchers (Schirillo 1999, Macpherson 2012) have attempted to (...) undermine the idea of the informational encapsulation of early vision by referring to experiments that seem to show that colour recognition is affected by the subject's beliefs about the typical colour of objects. In my view, however, one can reconcile the results of these experiments with the position that early vision is informationally encapsulated. Namely, I put fort a hypothesis according to which the early vision system has access to a local database that I call the mental palette and define as a network of associative links whose nodes stands for shapes and colours. The function of the palette is to facilitate colour recognition without employing central processes. I also describe two experiments by which the mental palette hypothesis can be tested. (shrink)

Species : visions and values -- Fantasies : seeing without what was within -- Prestiges : illusions in magic and art -- Glamours : demons and virtual worlds -- Images : the reformation of the eyes -- Apparitions : the discernment of spirits -- Sights : King Saul and King Macbeth -- Seemings : philosophical scepticism -- Dreams : the epistemology of sleep -- Signs : vision and the new philosophy.

Methods. Visual search experiments were carried out using simple black and white figures corresponding to shiny objects lit from various directions. These included, for example, depictions of cylinders with highlights positioned at various heights (see figure). Targets and distractors differed only in the arrangement of their constituent regions, allowing them to be distinguished by the position of the highlights on the corresponding objects.

A treatise concerning the principles of human knowledge -- An essay towards a new theory of vision -- Alciphron, the fourth dialogue (excerpts) -- The theory of vision.

According to Marr's theory of vision, computational processes of early vision rely for their success on certain "natural constraints" in the physical environment. I examine the implications of this feature of Marr's theory for the question whether psychological states supervene on neural states. It is reasonable to hold that Marr's theory is nonindividualistic in that, given the role of natural constraints, distinct computational theories of the same neural processes may be justified in different environments. But to avoid (...) trivializing computational explanations, theories must respect methodological solipsism in the sense that within a theory there cannot be differences in content without a corresponding difference in neural states. (shrink)

Although the study of visual perception has made more progress in the past 40 years than any other area of cognitive science, there remain major disagreements as to how closely vision is tied to general cognition. This paper sets out some of the arguments for both sides (arguments from computer vision, neuroscience, Psychophysics, perceptual learning and other areas of vision science) and defends the position that an important part of visual perception, which may be called early (...) vision or just vision, is prohibited from accessing relevant expectations, knowledge and utilities - in other words it is cognitively impenetrable. That part of vision is complex and articulated and provides a representation of the 3-D surfaces of objects sufficient to serve as an index into memory, with somewhat different outputs being made available to other systems such as those dealing with motor control. The paper also addresses certain conceptual and methodological issues, including the use of signal detection theory and event-related potentials to assess cognitive penetration of vision. A distinction is made among several stages in visual processing. These include, in addition to the inflexible early-vision stage, a pre-perceptual attention allocation stage and a post-perceptual evaluation, memory-accessing, and inference stage which provide several different highly constrained ways in which cognition can affect the outcome of visual perception. The paper discusses arguments that have been presented in both computer vision and psychology showing that vision is "intelligent" and involves elements of problem solving". It is suggested that these cases do not show cognitive penetration, but rather they show that certain natural constraints on interpretation, concerned primarily with optical and geometrical properties of the world, have been compiled into the visual system. The paper also examines a number of examples where instructions and "hints" are alleged to affect. (shrink)

This paper argues that a theory of situated vision, suited for the dual purposes of object recognition and the control of action, will have to provide something more than a system that constructs a conceptual representation from visual stimuli: it will also need to provide a special kind of direct (preconceptual, unmediated) connection between elements of a visual representation and certain elements in the world. Like natural language demonstratives (such as `this' or `that') this direct connection allows entities to (...) be referred to without being categorized or conceptualized. Several reasons are given for why we need such a preconcep- tual mechanism which individuates and keeps track of several individual objects in the world. One is that early vision must pick out and compute the relation among several individual objects while ignoring their properties. Another is that incrementally computing and updating representations of a dynamic scene requires keeping track of token individuals despite changes in their properties or locations. It is then noted that a mechanism meeting these requirements has already been proposed in order to account for a number of disparate empiri- cal phenomena, including subitizing, search-subset selection and multiple object tracking (Pylyshyn et al., Canadian Journal of Experimental Psychology 48(2) (1994) 260). This mechanism, called a visual index or FINST, is brie. (shrink)

The target article claimed that although visual apprehension involves all of general cognition, a significant component of vision (referred to as early vision) works independently of cognition and yet is able to provide a surprisingly high level interpretation of visual inputs, roughly up to identifying general shape-classes. The commentators were largely sympathetic, but frequently disagreed on how to draw the boundary, on exactly what early vision delivers, on the role that attention plays, and on how (...) to interpret the neurophysiological data showing top-down effects. A significant number simply asserted that they were not willing to accept any distinction between vision and cognition, and a surprising number even felt that we could never tell for sure, so why bother? Among the topics covered was the relation of cognition and consciousness, the relation of early vision to other modules such as face recognition and language, and the role of natural constraints. (shrink)

This paper describes a programmatic theory of a process in early vision called indexing. The theory hypothesizes that a small number of primitive indexes are available for individuating, tracking and providing direct access to salient visual objects. We discuss some empirical and theoretical arguments in favor of the proposed index as a resource-limited link between an internal visual representation and objects in the visual world. We argue that this link is needed to explain a large range of properties (...) of vision, including the ability to simultaneously track multiple moving objects, to select a subset of visual items to process, as well as such larger issues as how mental images get their apparent metrical properties and why the world appears stable despite constant retinal motion. (shrink)

Pylyshyn's effort in establishing the cognitive impenetrability of early vision is welcome. However, his view about the role of attention in early vision seems to be oversimplified. The allocation of focal attention manifests its effect among multiple stages in the early vision system, it is not just confined to the input and the output levels.

Licklider--1960--Man-Computer Symbiosis Roberts--1970--ARPAnet Internet Engelbart--1962-1968--Mouse, linked documents Kay--1970--Dynabook Berners-Lee--late 1980s and early 90s--World Wide Web Brin and Page--1996--Google--first adequate search engine other prophets--Nelson, etc. whom I neglect undeservedly from ignorance.

Two of the premises of the target paper -- surface reconstruction as the goal of early vision, and inaccessibility of intermediate stages in the process presumably leading to such reconstruction -- are questioned and found wanting.

The commentator agrees with Pylyshyn's most general claims but sees problems with the more specific proposals about where the boundary between early vision and later processing might lie. The boundary cuts across current models of identification. Limitations in current research on scenic context effects preclude firm conclusions. High-level vision will benefit more from integrative work than from premature analysis.

In this paper I argue for the cognitive impenetrability of perception by undermining the argument from reentrant pathways. To do that I will adduce psychological and neuropsychological evidence showing that (a) early vision processing is not affected by our knowledge about specific objects and events, and (b) that the role of the descending pathways is to enable the early-vision processing modules to participate in higher-level visual or cognitive functions. My thesis is that a part of observation, (...) which I will call perception, is bottom-up and theory neutral. As such, perception could play the role of common ground on which a naturalized epistemology can be built and relativism avoided. (shrink)

It was William Blake's insight that the Christian churches, by inverting the Incarnation and the dialectical vision of Paul, have repressed the body, divided God from creation, substituted judgment for grace, and repudiated imagination, compassion, and the original apocalyptic faith of early Christianity. Blake's prophetic poetry thus contributes to the renewal of Christian ethics by a process of subversion and negation of Christian moral, ecclesiastical, and theological traditions, which are recognized precisely as inversions of Jesus, and therefore as (...) instances of the forms of evil that God-in-Christ overcomes through Incarnation, reversing the Fall. Blake's great epic poems, particularly Milton (1804–08) and Jerusalem (1804–20), embody his heterodox representation of the final coincidence of Christ and Satan through which, at last, all things are made new. (shrink)

Philosophy in the period immediately after Aristotle is sometimes thought to be marked by the decline of natural philosophy and philosophical disinterest in contemporary achievements in the sciences. But in one area at least, the early third century B.C.E. was a time of productive interaction between such disparate fields as epistemology, physics and geometry. Debates between the sceptics and the dogmatic philosophical schools focus on epistemological problems about the possibility of self-evident appearances, but there is evidence from Euclid's day (...) of a quite different response. The sceptical challenge provoked the development of theories explaining error formation, showing how illusions can be studied systematically and are subject to prediction. Such theories do not legitimate claims about the nature of the underlying entities perceived, but provide justification for forming expectations about future perceptions. While it overtly focuses on purely geometrical considerations, the Euclidean model of optics nonetheless provides support for certain views about the nature of vision and the physics of light. Moreover, by offering a model in which the image received is not thought to be a perspicuous mirroring of the object seen, Euclid may have helped promote a view of perception as something reconstructed from information received, not as a mere form transferred into the eye. The ancient sceptic may indeed have fulfilled his promise to promote inquiry by focusing attention on problems that escape the attention of a hasty theorist. (shrink)

The present article is devoted to the problem which is debated actively to-day, namely whether Greek poleis and the Roman Republic were early states or they represented a specific type of stateless societies. In particular, Moshe Berent examines this problem by the example of Athens in his contribution to this volume. He arrives at the conclusion that Athens was a stateless society. However, I am of the opinion that this conclusion is wrong: and I believe that Athens and Rome (...) were early states. Therefore the present article is in many respects a direct discussion with Berent (as well as with other supporters of this idea). (shrink)

Pylyshyn defends a distinction between early visual perception and cognitive processing. But exactly where should the line between vision and cognition be drawn? Our research on object identification suggests that the construction of an object's visual description is isolated from contextually derived expectations. Moreover, the matching of constructed descriptions to stored descriptions appears to be similarly isolated.

Benton MacKaye's name is rarely evoked in the fields of environmental history and philosophy. The author of the Appalachian Trail in the early 1920s and a co-founder of the Wilderness Society with Aldo Leopold and Bob Marshall in the 1930s, MacKaye's unique contribution to American environmental thought is seldom recognized. This neglect is particularly egregious in the current debate over the intellectual foundations of the American wilderness idea, a discussion to which I believe MacKaye has much to contribute. Specifically, (...) I believe that his pragmatic vision for wilderness conservation, a project supported through an appeal to the values of a reconstructed "indigenous" communal environment, owes much to the social philosophy of Josiah Royce, MacKaye's former teacher at Harvard. While the Appalachian Trail never delivered on MacKaye's goals of progressive reform and failed to unite the regional planning and conservation communities of the time, his vision remains highly relevant to our present-day deliberations about the relationship between wild nature and society at the dawn of the 21st century. (shrink)

Philosophy in the period immediately after Aristotle is sometimes thought to be marked by the decline of natural philosophy and philosophical disinterest in contemporary achievements in the sciences. But in one area at least, the early third century B.C.E. was a time of productive interaction between such disparate fields as epistemology, physics and geometry. Debates between the sceptics and the dogmatic philosophical schools focus on epistemological problems about the possibility of self-evident appearances, but there is evidence from Euclid's day (...) of a quite different response. The sceptical challenge provoked the development of theories explaining error formation, showing how illusions can be studied systematically and are subject to prediction. Such theories do not legitimate claims about the nature of the underlying entities perceived, but provide justification for forming expectations about future perceptions. While it overtly focuses on purely geometrical considerations, the Euclidean model of optics nonetheless provides support for certain views about the nature of vision and the physics of light. Moreover, by offering a model in which the image received is not thought to be a perspicuous mirroring of the object seen, Euclid may have helped promote a view of perception as something reconstructed from information received, not as a mere form transferred into the eye. The ancient sceptic may indeed have fulfilled his promise to promote inquiry by focusing attention on problems that escape the attention of a hasty theorist. (shrink)

Liberation philosophy and democratic struggles -- The quest for the revolutionary subject : the early Marcuse -- The retrieval of Eros and the quest for a new sensibility -- Marcuse and the problem of intersubjectivity : beyond drive theory -- One-dimensional society and the demise of dialectical thinking -- Spectres of liberation : beyond one-dimensional man -- Liberal democracy and its limits : the challenge of race, class, gender, and sexual orientation -- Marcuse and discourse ethics -- Liberation and (...) the democratic vision : educating for a new sensibility. (shrink)

This paper offers a general reply to arguments from perceptual distortion (e.g. blur, perspective, double vision) against the representationalist thesis that the phenomenal characters of experiences supervene on their intentional contents. It has been argued that distorted and undistorted experiences are counterexamples to this thesis because they can share contents without sharing phenomenal characters. In reply, I suggest that cases of perceptual distortion do not constitute counterexamples to the representationalist thesis because the contents of distorted experiences are always impoverished (...) in some way compared to those of normal experiences. This is can be shown by considering limit cases of perceptual distortion, for example, maximally blurry experiences, which manifestly lack detailed content. I argue that since there is no reasonable way to draw the line between distorted experiences that have degraded content and distorted experiences that don't, we should allow that an increase in distortion is always accompanied by a degradation in content. I also discuss the prospects for a positive account of the contents specific to distorted experiences, which I argue are dim, but for reasons that should not throw doubt on the representationalist thesis. (shrink)

Representationalism is the position that the phenomenal character of a perceptual experience supervenes upon its representational content. The phenomenon of blurry vision is thought to raise a difficulty for this position. More specifically, it is alleged that representationalists cannot account for the phenomenal difference between clearly seeing an indistinct edge and blurrily seeing a distinct edge solely in terms of represented features of the surrounding environment. I defend representationalism from this objection by offering a novel account of the phenomenal (...) difference between these two kinds of cases. (shrink)

Drawing on Merleau-Ponty’s “Eye and Mind” and Bergson’s Matière et mémoire and “La perception du changement,” I ask what resources are available in vision for interrupting objectifying habits of seeing. While both Bergson and Merleau-Ponty locate the possibility of seeing differently in the figure of the painter, I develop by means of their texts, and in dialogue with Iris Marion Young’s work, a more general phenomenology of hesitation that grounds what I am calling “critical-ethical vision.” Hesitation, I argue, (...) stems from affect and leads to critical memory. In hesitation, the seeming coincidence between my habits of seeing and the visible is decentered, revealing these habits and their social reference as the constitutive horizon of my field of vision. Hesitation, then, provides the phenomenological moment within which vision may become at once critically watchful, destabilizing its objectifying habits, and ethically responsive, recollecting its affective grounds. The critical and the ethical are here inseparable. Critically, this vision is an awareness of the structures of invisibility, diacritical and habitual, social and historical, to which my vision owes—dimensions which institute particular ways of seeing and being as norm while eliding others. Ethically, this is the recognition of how seeing is already seeing with others—others whose affective influence is operative within vision, even as their existence is reductively represented or denied. (shrink)

This paper is an attempt to argue that there existed a very prominent view of signs and signification in late sixteenth- and seventeenth-century Europe which can help us to understand several puzzling aspects of baroque culture. This view, called here "pansemioticism," constituted a fundamental part of the baroque conception of the world. After sketching the content and importance of pansemioticism, I will show how it can help us to understand the (from a modern perspective) rather puzzling concept of the polymath, (...) or polyhistor, which constituted the ideal of the baroque scientist. In this context I will also discuss a seventeenth century phenomenon essentially connected with polyhistorism, namely that of the early modem polyhistorical collections, the Wunderkamnmern. Since such a study needs a clearly determined focal point, we will concentrate on the last three quarters of the seventeenth century and will mainly discuss works by German authors of the time. (shrink)

David Marr's theory of vision has been widely cited by philosophers and psychologists. I have three projects in this paper. First, I try to offer a perspicuous characterization of Marr's theory. Next, I consider the implications of Marr's work for some currently popular philosophies of psychology, specifically, the "hegemony of neurophysiology view", the theories of Jerry Fodor, Daniel Dennett, and Stephen Stich, and the view that perception is permeated by belief. In the last section, I consider what the phenomenon (...) of vision must be like for Marr's project to succeed. (shrink)

Provision of education for children under five has recently become a political concern. At the same time, this relatively small field has been attracting increased research attention, with many early years practitioners seeking routes to initial and higher degrees. This book offers essential guidance for researchers and newcomers to the field, outlining opportunities in research as well as useful, sensitive and appropriate methods for researching childhood education.

Imagine yourself sitting on your front porch, sipping your morning coffee and admiring the scene before you. You see trees, houses, people, automobiles; you see a cat running across the road, and a bee buzzing among the flowers. You see that the flowers are yellow, and blowing in the wind. You see that the people are moving about, many of them on bicycles. You see that the houses are painted different colors, mostly earth tones, and most are one-story but a (...) few are two-story. It is a beautiful morning. Thus the world interfaces with your mind through your senses. There is a strong intuition that we are not disconnected from the world. We and the other things we see around us are part of a continuous whole, and we have direct access to them through vision, touch, etc. However, the philosophical tradition tries to drive a wedge between us and the world by insisting that the information we get from perception is the result of inference from indirect evidence that is about how things look and feel to us. The philosophical problem of perception is then to explain what justifies these inferences. We will focus on visual perception. Figure one presents a crude diagram of the cognitive system of an agent capable of forming beliefs on the basis of visual perception. Cognition begins with the stimulation of the rods and cones on the retina. From that physical input, some kind of visual processing produces an introspectible visual image. In response to the production of the visual image, the cognizer forms beliefs about his or her surroundings. Some beliefs the perceptual beliefs are formed as direct responses to the visual input, and other beliefs are inferred from the perceptual beliefs. The perceptual beliefs are, at the very least, caused or causally influenced by having the image. This is signified by the dashed arrow marked with a large question mark. We will refer to this as the mystery link. Figure one makes it apparent that in order to fully understand how knowledge is based on perception, we need three different theories.. (shrink)

You might reasonably surmise from the title of this paper that I will be discussing a theory of vision. After all, what is a theory of vision but a theory of how the world is connected to our visual representations? Theories of visual perception universally attempt to give an account of how a proximal stimulus (presumably a pattern impinging on the retina) can lead to a rich representation of a three dimensional world and thence to either the recognition (...) of known objects or to the coordination of actions with visual information. Such theories typically provide an effective (i.e., computable) mapping from a 2D pattern to a representation of a 3D scene, usually in the form of a symbol structure. But such a mapping, though undoubtedly the essential purpose of a theory of vision, leaves at least one serious problem that I intend to discuss here. It is this problem, rather than a theory of vision itself, that is the subject of this talk. (shrink)

Introduction In 1709 George Berkeley published his first substantial work, An Essay towards a New Theory of Vision. As a contribution to the theory of ...

Vision, more than any other sense, dominates our mental life. Our visual experience is just so rich, so detailed, that we can hardly distinguish that experience from the world itself. Even when we just think about the world and don't look at it directly, we can't help but 'imagine' what it looks like. We think of 'seeing' as being a conscious activity--we direct our eyes, we choose what we look at, we register what we are seeing. The series of (...) events described in this book radically altered this attitude towards vision. This book describes one of the most extraordinary neurological cases of recent years--one that profoundly changed scientific views on consciousness. It is the story of Dee Fletcher--a woman recently blinded--who became the subject of a series of scientific studies. As events unfolded, Milner and Goodale found that Dee wasn't in fact blind--she just didn't know that she could see. Taking us on a journey into the unconscious brain, the two scientists who made this incredible discovery tell the amazing story of their work, and the surprising conclusion they were forced to reach. Written to be accessible to students and popular science readers, this book is a fascinating illustration of the power of the 'unconscious' mind. (shrink)

Light has often been privileged as a metaphor for objectivity and truth in Western thought, a status that has been challenged by recent feminist thought as giving entitlement to the masculine. This book presents a compelling new perspective on this metaphor, and explores the role the visual plays in Western philosophy by examining the thought of Irigaray, Levinas and Merleau- Ponty. Textures of Light is one of the first studies to challenge current interpretations by presenting Irigaray as a philosopher of (...) vision rather than touch. (shrink)

b>. Computational models of colour vision assume that the biological function of colour vision is to detect surface reflectance. Some philosophers invoke these models as a basis for 'externalism' about perceptual content (content is distal) and 'objectivism' about colour (colour is surface reflectance). In an earlier article (Thompson et al. 1992), I criticized the 'computational objectivist' position on the basis of comparative colour vision: There are fundmental differences among the colour vision of animals and these differences (...) do not converge on the detection of any single type of environmental property. David R. Hilbert (1992) has recently defended computational objectivism against my 'comparative argument;' his arguments are based on the externalist approach to perceptual content originally developed by Mohan Matthen (1988) and on the computationally inspired theory of the evolutionary basis for trichromacy developed by Roger N. Shepard (1990). The present article provides a reply to Hilbert with extensive criticism of both Matthen's and Shepard's theories. I argue that the biological function of colour vision is not to detect surface reflectance, but to provide a set of perceptual categories that can apply to objects in a stable way in a variety of conditions. Comparative research indicates that both the perceptual categories and the distal stimuli will differ according to the animal and its visual ecology; therefore externalism and objectivism must be rejected. (shrink)

This book is a major contribution to the interdisciplinary project of investigating the true nature of color vision. In recent times, research into color vision has been one of the main success stories of cognitive science. Each discipline in the field--neuroscience, psychology, linguistics, computer science and philosophy--has contributed significantly to our understanding of color. Evan Thompson provides an accessible review of current scientific and philosophical discussions of color vision. He steers a course between the subjective and objective (...) positions on color, arguing for a relational account. Thompson develops a novel "ecological" approach to color vision in cognitive science and the philosophy of perception. The book is vital reading for all cognitive scientists and philosophers whose interests touch upon this central area. (shrink)

Explores the impact that imagination in preschool and early childhood education has had on the lives of various populations.

This paper examines the status of unattended visual stimuli in the light of recent work on the role of attention in visual perception. Although the question of whether attention is required for visual experience seems very interesting, this paper argues that there currently is no good reason to take a stand on the issue. Moreover, it is argued that much of the allure of that question stems from a continued attachment to the defective ‘inner picture view’ of experience and a (...) mistaken notion that the ultimate goal of vision is to produce visual experience. The paper considers a promising general account of the content and structure of vision and presents reasons for not taking that account to be committed to any substantive claims about the experiential status of unattended visual stimuli. Also addressed are the active nature of vision and the role of vision in enabling our ecological success. These considerations highlight that visual experience is not the whole of vision and that a much more important question about unattended visual stimuli than whether they are consciously experienced is what contribution they make to how we interact with the world. (shrink)

There is a common assumption about pictures, that seeing them produces in us something like the same effects as seeing the things they depict. This assumption lies behind much empirical research into vision, where experiments often expose subjects to pictures of things in order to investigate the processes involved in cognizing those things themselves. Can philosophy provide any justification for this assumption? I examine this issue in the context of Flint Schier's account of pictorial representation. Schier attempts to infer (...) the assumption from what he takes to be the fundamental facts about picturing. I argue that there is no plausible form of Schier's basic claims from which the assumption can be inferred. I then reject a second argument, that by appealing to the assumption Schier could explain why it is impossible to depict a particular without depicting it as having certain properties. I conclude that those sympathetic to the assumption need to articulate and defend some version of it suited to their needs. (shrink)

The standard adaptationist explanation of the presence of a sensory mechanism in an organism--that it detects properties useful to the organism--cannot be given for color vision. This is because colors do not exist. After arguing for this latter claim, I consider, but reject, nonadaptationist explanations. I conclude by proposing an explanation of how color vision could have adaptive value even though it does not detect properties in the environment.

Russell (1912) and others have argued that the real nature of colour is transparentto us in colour vision. It's nature is fully revealed to us and no further knowledgeis theoretically possible. This is the doctrine of revelation. Two-dimensionalFourier analyses of coloured checkerboards have shown that apparently simple,monadic, colours can be based on quite different physical mechanisms. Experimentswith the McCollough effect on different types of checkerboards have shown thatidentical colours can have energy at the quite different orientations of Fourierharmonic components (...) but no energy at the edges of the checkerboards, thusrefuting revelation. It is concluded that this effect is not explained by a superveniencedispositional account of colour as proposed by McGinn (1996). It was argued that theMcCollough effect in checkerboards was an example of a local mind/body reduction(Kim 1993), by which the different characteristics of identical colours falsifies revelation. This reduction being based on both physical and neurological mechanisms led to a clear explanation of the perceive phenomenal effects and thus laid a small bridge over the explanatory gap. (shrink)

What this book is about -- Theoretical perspectives : modernity and postmodernity, power and ethics -- Constructing early childhood institution : what do we think it is? -- Constructing the early childhood institution : what do we think they are for? -- Beyond the discourse of quality to the discourse of meaning making -- The stockholm project : constructing a pedagogy that speaks in the voice of the child, the pedagogue and the parent -- Pedagogical documentation : a (...) practice for reflection and democracy -- Minority directions in the majority world : threats and possibilities. (shrink)

The indexical thesis says that the indexical terms, “I”, “here” and “now” necessarily refer to the person, place and time of utterance, respectively, with the result that the sentence, “I am here now” cannot express a false proposition. Gerald Vision offers supposed counter-examples: he says, “I am here now”, while pointing to the wrong place on a map; or he says it in a note he puts in the kitchen for his wife so she’ll know he’s home even though (...) he’s gone upstairs for a nap, but then he leaves the house, forgetting to remove the note. The first sentence is false by virtue of “here” not necessarily referring to the place of utterance, the second sentence, by virtue of “now” not necessarily referring to the time of utterance. We argue that these sentences express falsehoods only because the terms are being used demonstratively, not indexically – the distinction pertains not to words simpliciter, but to uses of words. When used indexically, the terms refer in accord with the indexical thesis; but when used demonstratively, their referents depend on how devices of ostension are used with their utterance – pointings, and the like. Thus Vision’s first sentence really says, “I am there now”, referring to the place on the map the finger is pointing to. As for his second sentence, we distinguish the time of utterance or production of a sentence from the time of its uptake. Due to the pragmatics of interpretation, the sentence really says “I” – the person ‘uttering’ the note – “am here” – here where the note is, with the note serving as a kind of proxy ‘finger’ – “now” – where “now” refers to the time of uptake of the note, i.e., when it is read. “I” refers indexically, “here”, demonstratively, and “now”, indexically, but indexically to the time of uptake. Since the sentence is not purely indexical, its falsehood doesn’t threaten the indexical thesis. A similar treatment is given of teletyped messages about the typer’s location. (shrink)

Faculty Of Philosophy, Tilburg University, P.O. Box 90153, 5000 LE Tilburg, The Netherlands m.k.d.schouten{at}uvt.nl' + u + '@' + d + ''//--> This paper inquires into the nature of intertheoretic relations between psychology and neuroscience. This relationship has been characterized by some as one in which psychological explanations eventually will fall away as otiose, overthrown completely by neurobiological ones. Against this view it will be argued that it squares poorly with scientific practices and empirical developments in the cognitive neurosciences. We (...) analyse a case from research on visual perception, which suggests a much more subtle and complex interplay between psychology and neuroscience than a complete take-over of the former by the latter. In the case of vision, cross-theory influences between psychology and neuroscience go back and forth, resulting in refinement in both disciplines. We interpret this case study as showing that: (1) Mutual co-evolution of psychological and neurobiological theories, exemplifying persisting top-down influences from psychology, is a more empirically adequate way to describe psychoneural theory relations than a view on co-evolution, favoured by reductionists, which regards the cross-theory contributions from psychology as merely heuristically useful with no enduring influence on neurobiological theorizing; (2) In research on vision, discovering (or hypothesizing) the neural basis of functions vindicates psychological approaches, it does not eliminate them; (3) Current work on vision shows that many perceptual phenomena must be understood in terms of dynamical interactions between an observer and his/her environment. Therefore, we argue that internalist characterizations of the visual system must be supplemented with externalist accounts that address these reciprocal observer-environment interactions involved in vision. Such processes seem quite different from (internal) cellular and molecular ones, and as such seem to lie outside the scope of neuroscientific inquiry. We conclude that psychoneural reduction or elimination is implausible as a meta-theoretical prediction of theory choice in empirical work. Instead, this case study of vision shows that both psychology and neuroscience contribute to, and complement one another in the study of visual perception. Psychoneural reductionism 1.1 Introduction 1.2 New Wave Reductionism 1.3 NWR and psychology: three characteristics of psychoneural reductionism 1.4 NWR and the problem of mutual feedback 1.4.1 The ?Mere Heuristics? claim 1.4.2 The disappearance of psychology as an irrelevant historical accident 1.5 Summary: three claims of NWR on psychoneural reduction Vision: a case study 2.1 Introduction 2.1.1 Three opposing claims 2.1.2 Psychology and neuroscience of vision: the orthodoxy 2.2 Testing claim 1: vanishing heuristics or persisting influences? 2.2.1 From what and where to perception and action 2.2.2 Real co-evolution: more than vanishing heuristics 2. (shrink)

A critical survey of recent work on the ontological status of colors supports the conclusion that, while some accounts of color can plausibly be dismissed, no single account can yet be endorsed. Among the remaining options are certain forms of color realism according which familiar colors are instantiated by objects in our extra-cranial visual environment. Also still an option is color anti-realism, the view that familiar colors are, at best, biologically adaptive fictions, instantiated nowhere.I argue that there is simply no (...) fact of the matter as to which of these remaining options is correct. I blame this indeterminacy on the fact that color vision exhibits several of the hallmarks of a modular input system, as described by Jerry Fodor in The Modularity of Mind. (shrink)

Frances Egan argues that the states of computational theories of vision are individuated individualistically and, as far as the theory is concerned, are not intentional. Her argument depends on equating the goals and explanatory strategies of computational psychology with those of its algorithmic level. However, closer inspection of computational psychology reveals that the computational level plays an essential role in explaining visual processes and that explanations at this level are nonindividualistic and intentional. In conclusion, I sketch an account of (...) content in which content does the sort of explanatory work that Egan denies is possible. (shrink)

Going beyond the theory/practice and discourse/matter divides -- Learning and becoming in an onto-epistemology -- The tool of pedagogical documentation -- An intra-active pedagogy and its dual movements -- Transgressing binary practices in early childhood teacher education -- The hybrid-writing-process: going beyond the theory/practice divide in academic writing -- An ethics of immanence and potentialities for early childhood education.

In the theory of the early state it was fundamentally new and important from a methodological point of view to define the early state as a separate stage of evolution essentially different from the following stage, the one of the full-grown or mature state. ‘To reach the early state level is one thing, to develop into a full-blown, or mature state is quite another’ (Claessen and Skalník 1978b: 22). At the same time they (as well as a (...) number of other authors) indicated quite soundly that not all early states were able to become and actually became mature ones (see e.g., Claessen and Skalník 1978a; Claessen and van de Velde 1987b; Shifferd 1987). Thus there was formed exactly an evolutionary sequence of statehood in the form of a two-stage scheme: the early state – the mature state. And that explained a lot in the mechanisms and directions of the political evolution. However, the former of these two stages of the evolution of statehood (the early state) has been studied rather thoroughly, whereas the latter (the mature state) has not become the subject of a similarly close examination. Unfortunately, the analysis of the mature state has been little advanced in those several contributions to the subsequent volumes of the Early State project (further referred to as Project) where the subject was touched upon. In the present paper after a brief analysis of the Project participants' views on the mature state I will present my own approach to the distinction of the stages of the evolution of statehood which to my mind develops and supplements Claessen – Skalník's ideas on the subject. However, this has made it necessary to suggest new formulations of the main characteristics of each stage of the evolution of the state. (shrink)

This book is a major contribution to the interdisciplinary project of investigating the true nature of color vision.

This paper argues that early modern experimental philosophy emerged as the dominant member of a pair of methods in natural philosophy, the speculative versus the experimental, and that this pairing derives from an overarching distinction between speculative and operative philosophy that can be ultimately traced back to Aristotle. The paper examines the traditional classification of natural philosophy as a speculative discipline from the Stagirite to the seventeenth century; medieval and early modern attempts to articulate a scientia experimentalis; and (...) the tensions in the classification of natural magic and mechanics that led to the introduction of an operative part of natural philosophy in the writings of Francis Bacon and John Johnston. The paper concludes with a summary of the salient discontinuities between the experimental/speculative distinction of the mid-seventeenth century and its predecessors and a statement of the developments that led to the ascendance of experimental philosophy from the 1660s. (shrink)

This is a full length review in which I discuss the strengths and weaknesses of Jane Geaney's On the Epistemology of the Senses in Early Chinese Thought. Geaney's strengths lie in her refusal to import Western epistemological presuppositions into depictions of Early Chinese philosophy, her meticulous canvassing of key Warring States texts, and her insightful reconstruction of Early Chinese epistemology as based on perception rather than abstract concepts. Her weaknesses are the limited range of her representative texts (...) and her occasional overgeneralizations. In the first half of the review, I summarize Geaney's solid conclusions: knowledge in Warring States texts was stated in terms of, and even constituted by, seeing and hearing (as opposed to the primacy of sight in the West); seeing and hearing were referred to in paired tropes; the epistemology of seeing and hearing generally involved moral evaluation; and the heartmind had a triple role in this process as verifier, as ruler, and as a sense in its own right. In the second half of the review, I demonstrate the limitations of Geaney's methodology, using her example of the relationship of qi and wind. (shrink)

Blindsight and vision for action seem to be exemplars of unconscious visual processes. However, researchers have recently argued that blindsight is not really a kind of uncon- scious vision but is rather severely degraded conscious vision. Morten Overgaard and col- leagues have recently developed new methods for measuring the visibility of visual stimuli. Studies using these methods show that reported clarity of visual stimuli correlates with accuracy in both normal individuals and blindsight patients. Vision for action (...) has also come under scrutiny. Recent findings seem to show that information processed by the dor- sal stream for online action contributes to visual awareness. Some interpret these results as showing that some dorsal stream processes are conscious visual processes (e.g., Gallese, 2007; Jacob & Jeannerod, 2003). The aim of this paper is to provide new support for the more traditional view that blindsight and vision for action are genuinely unconscious per- ceptual processes. I argue that individuals with blindsight do not have access to the kind of purely qualitative color and size information which normal individuals do. So, even though people with blindsight have a kind of cognitive consciousness, visual information process- ing in blindsight patients is not associated with a distinctly visual phenomenology. I argue further that while dorsal stream processing seems to contribute to visual awareness, only information processed by the early dorsal stream (V1, V2, and V3) is broadcast to working memory. Information processed by later parts of the dorsal stream (the parietal lobe) never reaches working memory and hence does not correlate with phenomenal awareness. I con- clude that both blindsight and vision for action are genuinely unconscious visual processes. (shrink)

Experience with inverting glasses reveals key factors of spatial vision. Interpretations of the literature based on the metaphor of a “visual image” have raised the question whether visual experience with inverting glasses remains inverted or whether it may turn back to normal after adaptation to the glasses. Here, I report on my experience with left/right inverting glasses and argue that a more fine-grained sensorimotor analysis can resolve the issue. Crucially, inverting glasses introduce a conflict at the very heart of (...) spatial vision. At first, the experience of visual direction grounded in head movements differs from visual experience grounded in eye movements. During adaptation, this difference disappears, and one may learn to see without conflict where objects are located (this took me 123 h of practice). The momentary experience became once again integrated within the larger flow of visual exploration involving head movements, a change of experience that was abrupt and comparable to a Gestalt switch. The resulting experience remains different from normal vision, and I argue that this difference can be understood in sensorimotor terms. I describe how adaptation to inverting glasses is further reflected in mental imagery, supporting the idea that imagery is grounded in sensorimotor engagement with the environment as well. (shrink)

Recent government attention to the coherence between early childhood and compulsory school curricula in Aotearoa/New Zealand has led to debates regarding the educational aims of different education sectors. Concerns regarding a ‘push-down’ of compulsory school aims are highlighted in this article, with reference to Nel Noddings's Happiness and Education and the problem of an increased ‘measuring’ of early childhood education aims and outcomes. It is argued that removal of seams between early childhood and primary education may lead (...) to unhappiness in early childhood education characterised by increasing standardisation and regulation and decreasing engagement with the aims of education—with, in Noddings's words, ‘aims-talk’. (shrink)

A semiotic theory of systems derived from language would have the purpose of classifying all the systems of linguistic expression: philosophy, ideology, myth, poetry, art, as much as the dream, lapsus, and free association in a pluridimensional matrix that will interact with many diversified fields. In each one of these discourses it is necessary to consider a plurality of questions, the essence of which will only be comprehensible by the totality; it will be necessary to ask, in the first place, (...) what will be the purpose of this language, what function does it fulfill and for which reason has it been constructed. The concept of World vision (WV) is introduced and its relation with Generalized Collective Conscience (GCC) and Particularized Collective Conscience. Culture implies a particular WV. Culture creates GCC. The semantic field is a structure that formalizes the units of a certain culture constituting a portion of the vision of the Reality that owns this culture. An ecological case is explained. (shrink)

With places at nursery school promised for every child above the age of four, this book raises the stakes by looking at the quality of what is provided, and how that compares to what should be provided. Beyond Quality In Early Childhood Education and Care challenges received wisdom and the tendency to reduce philosophical issues of value to purely technical issues of measurement and management. In its place, it offers alternative ways of understanding early childhood, early childhood (...) institutions and pedagogical work. The book places issues of early childhood into a global context and relates them to writers from many fields. Drawing on work with aboriginal peoples in Canada, on the experience of Reggio-Emilia in Italy and on a project in Stockholm inspired by Reggio, the book considers the implications of these alternative ways of understanding, for practice and a reconceptualization of early childhood education and care. (shrink)

Philosophy of Early Childhood Education: Transforming Narratives provides an insightful reflection on some contemporary issues and theories underpinning early childhood education. The essays in this volume penned by an international group of educators are both critical and transformative, offering new insights on the practices and policies within early childhood education. Provides a critical reflection on some current issues within early childhood education Offers perspectives outside traditional narratives of early childhood Encourages the emergence of new paradigms (...) for early childhood education Promotes the value of difference, perspective, and “otherness” Features an international field of contributors from diverse geographical boundaries. (shrink)

With increasing development in the field of early childhood education and care, and new interest in alternative approaches to early years provision internationally, there is an urgent need for a book which explores and explains historical roots of practices and philosophical ideas which have underpinned the development of those practices in the field. This book traces historical ideas and their pioneers. It provides brief biographies and critical insights into their work as individuals and compares their principles and practices (...) to those of others past and present. Traditionally, historical reflections and philosophical critiques can be dense and difficult for readers to access and so many students and practitioners remain unaware of the roots of their current practice. This book takes an innovative and accessible approach to the history and philosophy of early childhood education. It gives sufficient, meaningful detail about individual educators and contributors to the field in order to help readers understand how contributions and developments in the past have created routes to present thinking and practice. So, the book offers five things: " An historical overview of the development of key ideas and practices in ECE from JJ Rousseau to the present time; " A series of biographical accounts of some 20 key contributors to the field, with summaries of their major achievements and key texts; " An exploration of ways in which their ideas compare through lively, imagined conversations based on their writings; " An analysis of ways in which certain common themes can be seen in both early writings and current practices; and " An illustration of how teachers can use these ideas in professional development activities in LEA and HE contexts. (shrink)

A study of Hippolytus of Rome and his treatment of Presocratic Philosophy, used as a case study to argue against the use of collections of fragments and in favour of the idea of reading "embedded texts" with attention to the interpretation and interests of the quoting author. A study of methodology in early Greek Philosophy. Includes novel interpretations of Heraclitus and Empedocles, and an argument for the unity of Empedocles's poem.

In this paper, I critically assess the enactive account of visual perception recently defended by Alva Noë (2004). I argue inter alia that the enactive account falsely identifies an object’s apparent shape with its 2D perspectival shape; that it mistakenly assimilates visual shape perception and volumetric object recognition; and that it seriously misrepresents the constitutive role of bodily action in visual awareness. I argue further that noticing an object’s perspectival shape involves a hybrid experience combining both perceptual and imaginative elements (...) – an act of what I call ‘make-perceive.’. (shrink)

We have been accustomed at least since Kant and mainstream history of philosophy to distinguish between the ‘mechanical’ and the ‘teleological’; between a fully mechanistic, quantitative science of Nature exemplified by Newton (or Galileo, or Descartes) and a teleological, qualitative approach to living beings ultimately expressed in the concept of ‘organism’ – a purposive entity, or at least an entity possessed of functions. The beauty of this distinction is that it seems to make intuitive sense and to map onto historical (...) and conceptual constellations in medicine, physiology and the related natural-philosophical discussions on the status of the body versus that of the machine. In this presentation I argue that the distinction between mechanism and teleology is imprecise and flawed, on the basis of a series of examples: the presence of ‘functional’ or ‘purposive’ features even in Cartesian physiology; work such as that of Richard Lower’s on animal respiration; the fact that the model of the ‘body-machine’ is not at all a mechanistic reduction of organismic properties to basic physical properties but on the contrary a way of emphasizing the uniqueness of organic life; and the concept of ‘animal economy’ in vitalist medical theory, which I present as a kind of ‘teleo-mechanistic’ concept of organism (borrowing a term of Timothy Lenoir’s which he used to discuss 19th-century embryology) – neither mechanical nor teleological. (shrink)

The processes whereby our brains continue to learn about a changing world in a stable fashion throughout life are proposed to lead to conscious experiences. These processes include the learning of top-down expectations, the matching of these expectations against bottom-up data, the focusing of attention upon the expected clusters of information, and the development of resonant states between bottom-up and top-down processes as they reach an attentive consensus between what is expected and what is there in the outside world. It (...) is suggested that all conscious states in the brain are resonant states and that these resonant states trigger learning of sensory and cognitive representations. The models which summarize these concepts are therefore called Adaptive Resonance Theory, or ART, models. Psychophysical and neurobiological data in support of ART are presented from early vision, visual object recognition, auditory streaming, variable-rate speech perception, somatosensory perception, and cognitive-emotional interactions, among others. It is noted that ART mechanisms seem to be operative at all levels of the visual system, and it is proposed how these mechanisms are realized by known laminar circuits of visual cortex. It is predicted that the same circuit realization of ART mechanisms will be found in the laminar circuits of all sensory and cognitive neocortex. Concepts and data are summarized concerning how some visual percepts may be visibly, or modally, perceived, whereas amodal percepts may be consciously recognized even though they are perceptually invisible. It is also suggested that sensory and cognitive processing in the What processing stream of the brain obey top-down matching and learning laws that are often complementary to those used for spatial and motor processing in the brain's Where processing stream. This enables our sensory and cognitive representations to maintain their stability as we learn more about the world, while allowing spatial and motor representations to forget learned maps and gains that are no longer appropriate as our bodies develop and grow from infanthood to adulthood. Procedural memories are proposed to be unconscious because the inhibitory matching process that supports these spatial and motor processes cannot lead to resonance. (shrink)

Introduction There are some exceptions, which we shall see below, but virtually all theories in psychology and cognitive science make use of the notion of representation. Arguably, folk psychology also traffics in representations, or is at least strongly suggestive of their existence. There are many different types of things discussed in the psychological and philosophical literature that are candidates for representation-hood. First, there are the propositional attitudes – beliefs, judgments, desires, hopes etc. (see Chapters 9 and 17 of this volume). (...) If the propositional attitudes are representations, they are person-level representations – the judgment that the sun is bright pertains to John, not a subpersonal part of John. By contrast, the representations of edges in V1 of the cerebral cortex that neuroscientists talk about and David Marr’s symbolic representations of “zero-crossings” in early vision (Marr 1982) are at the “sub-personal” level – they apply to parts or states of a person (e.g. neural parts or computational states of the visual system). Another important distinction is often made among perceptual, cognitive, and action-oriented representations (e.g. motor commands). Another contrast lies between “stored representations” (e.g. memories) and “active representations” (e.g. a current perceptual state). Related to this is the distinction between “dispositional representations” and “occurrent representations.” Beliefs that are not currently being entertained are dispositional, e.g. your belief that the United States is in North America - no doubt you had this belief two minutes ago, but you were not consciously accessing it until you read this sentence. Occurrent representations, by contrast, are active, conscious thoughts or perceptions. Which leads us to another important distinction: 1 between conscious and non-conscious mental representations, once a bizarre-sounding distinction that has become familiar since Freud (see Chapter 4 of this volume). I mention these distinctions at the outset to give you some idea of the range of phenomena we will be considering, and to set the stage for our central “problem of representation”: what is a mental representation, exactly, and how do we go about deciding whether there are any? We know there are public representations of various kinds: words, maps, and pictures, among others.. (shrink)

This volume focuses on the development of empiricism as an interest in the body - as both the object of research and the subject of experience.

Often when there is no attention to an object, there is no conscious perception of it either, leading some to conclude that conscious perception is an attentional phenomenon. There is a well-known perceptual phenomenon—visuo-spatial crowding, in which objects are too closely packed for attention to single out one of them. This article argues that there is a variant of crowding—what I call ‘‘identity-crowding’’—in which one can consciously see a thing despite failure of attention to it. This conclusion, together with new (...) evidence that attention to an object occurs in unconscious perception, suggests there may be a double dissociation between conscious perception of an object and attention to that object, constraining the extent to which consciousness can be constitutively attentional. The argument appeals to a comparison between the minimal resolution (or ‘‘grain’’) of object-attention and object-seeing. (shrink)

The view that special science properties are multiply realizable has been attacked in recent years by Shapiro, Bechtel and Mundale, Polger, and others. Focusing on psychological and neuroscientific properties, I argue that these attacks are unsuccessful. By drawing on interspecies physiological comparisons I show that diverse physical mechanisms can converge on common functional properties at multiple levels. This is illustrated with examples from the psychophysics and neuroscience of early vision. This convergence is compatible with the existence of general (...) constraints on the evolution of cognitive systems, and does not involve any ad hoc typing of coarse-grained higher level properties. The mechanisms that realize these common higher level properties are really distinct by the criteria laid down by critics of multiple realizability. Finally, I present an account of how such functional properties might constitute special science kinds by playing a central explanatory role in a range of cognitive models. Behavioral science kinds in particular are the functionally defined constituents picked out by our most successful models of the multilevel systems and mechanisms that explain cognitive capacities. (shrink)

Three different ways to understand the representational content of the feature maps employed in early vision are compared. First is Stephen Kosslyn's claim, entered as part of the debate over mental imagery, that such areas support "depictive" representation, and that visual perception uses them as depictive representations. Reasons are given to doubt this view. Second, an improved version of what I call "feature-placing" is described and advanced. Third, feature-placing is contrasted with the notion that the representational content of (...) those feature maps could be conveyed in a list of sentences about visual objects. Some problems with this last alternative are described. (shrink)

Dewey's project -- Cultural and intellectual background -- Rehabilitating Dewey's psychology -- The nature of knowledge -- What we know -- Feeling, will, and self-realization -- Beyond modernist culture -- A new idealism.

Pylyshyn acknowledges that cognition intervenes in determining the nature of perception when attention is allocated to locations or properties prior to the operation of early vision. I present evidence that scale perception (one function of early vision) is cognitively penetrable and argue that Pylyshyn's criterion covers not a few, but many situations of recognition. Cognitive penetrability could be their modus operandi.

This new edition uses the technique of visual masking to explore temporal aspects of conscious and unconscious processes down to a resolution in the...

In Color for Philosophers C. L. Hardin argues that chromatic objectivism?a view which identifies colour with some or other property of objects?must be false. The upshot of Hardin's argument is this: there is, in fact, no principled correlation between physical properties and perceived colours. Since that correlation is a minimal condition for objectivism, objectivism is false. Mohan Matthen, who accepts Hardin's conclusion for what can be called "simple objectivism," takes it that an adaptationist theory of biological function applied to colour (...) is able to surmount the problems Hardin describes. It is Matthen's view that I am primarily concerned with in this paper. I will argue that it entails an overly simple view of adaptive value?as, perhaps, do all objectivist views. (shrink)

The focus here is Robert L. Heilbroner's critique, in the last chapter of the 7th edition of The Worldly Philosophers, of the idea that economics is, or should be, scientific. Heilbroner's conception of economics as essentially tied to capitalism is too narrow, and at odds with his own commentary on the rise of pauperism after the English common-land enclosures; and his critique of contemporary economics-as-social science is overdrawn. Nevertheless, there is indeed an important role for the “visionary” economics for which (...) Heilbroner hankers: assessing the benefits and drawbacks of different ways of ordering the production and distribution of goods and services. (shrink)

This paper examines the pressures leading two very different Early Modern philosophers, Descartes and Locke, to invoke two ways in which thought is directed at objects. According to both philosophers, I argue, the same idea can simultaneously count as “of” two different objects—in two different senses of the phrase ‘idea of’. One kind of intentional directedness is invoked in answering the question What is it to think that thus-and-so? The other kind is invoked in answering the question What accounts (...) for the success of our proper methods of inquiry? For Descartes as well as Locke, the two kinds of “ofness” come apart as a result of strong rationalist commitments. However, I will suggest that even if we reject such commitments, we go wrong if we assume that a single kind of intentional directedness suffices to address both questions. (shrink)

This article defends the claim that a significant part of visual perception (called “early vision”) is impervious to the influence of beliefs, expectations or knowledge. We examine a wide range of empirical evidence that has been cited in support of the continuity of vision and cognition and argue that the evidence either shows within- vision top-down effects, or else the extra-visual effects that are demonstrated occur before the operation of the autonomous early vision system (...) (through the allocation of focal attention) or after the visual system has produced its 3D shape-description (through the intervention of post-visual decision processes). (shrink)