Research on sleep loss and vigilance both focus on declines in cognitive performance, but theoretical accounts have developed largely in parallel in these two areas. In addition, computational instantiations of theoretical accounts are rare. The current work uses computational modeling to explore whether the same mechanisms can account for the effects of both sleep loss and time on task on performance. A classic task used in the sleep deprivation literature, the Psychomotor Vigilance Test, was extended from the typical 10-min duration (...) to 35 min, to make the task similar in duration to traditional vigilance tasks. A computational cognitive model demonstrated that the effects of time on task in the PVT were equivalent to those observed with sleep loss. Subsequently, the same mechanisms were applied to a more traditional vigilance task—the Mackworth Clock Task—providing a good fit to existing data. This supports the hypothesis that these different types of fatigue may produce functionally equivalent declines in performance. (shrink)

Visual working memory is a construct hypothesized to store a small amount of accurate perceptual information that can be brought to bear on a task. Much research concerns the construct's capacity and the precision of the information stored. Two prominent theories of VWM representation have emerged: slot-based and continuous-resource mechanisms. Prior modeling work suggests that a continuous resource that varies over trials with variable capacity and a potential to make localization errors best accounts for the empirical data. Questions remain regarding (...) the variability in VWM capacity and precision. Using a novel eye-tracking paradigm, we demonstrate that VWM facilitates search and exhibits effects of fixation frequency and recency, particularly for prior targets. Whereas slot-based memory models cannot account for the human data, a novel continuous-resource model does capture the behavioral and eye tracking data, and identifies the relevant resource as item activation. (shrink)

Veksler and Gunzelmann argue that the vigilance decrement and the deleterious effects of sleep loss reflect functionally equivalent degradations in cognitive processing and performance. Our account is implemented in a cognitive architecture, where these factors produce breakdowns in goal-directed cognitive processing that we refer to as microlapses. Altmann raises a number of challenges to microlapses as a unified account of these deficits. Under scrutiny, however, the challenges do little to discredit the theory or conclusions in the original paper. In (...) our response, we address the most serious challenges. In so doing, we provide additional support for the theory and mechanisms, and we highlight opportunities for extending their explanatory breadth. (shrink)

Based on social-cognitive theory, this article proposes a model that seeks to explain why high status organizational members engage in unethical behavior. We argue that status differentiation in organizations creates social isolation which initiates activation of high status group identity and a deactivation of moral identity. We further argue that high status group identity results in insensitivity to the needs of out-group members which, in turn, results in lessened motivation to selfregulate ethical decision making. As a result of this identity (...) activation, we demonstrate how high status individuals will be more vulnerable to engaging in unethical activities. Individual-level moderators of the relationships are also discussed. (shrink)

Many analyses of belief in the soul ignore the soul in the words. Dislocations of concepts occur when words are divorced from their normal implications. The ‘soul’ is sometimes the dislocated utterer of such words. Pictures, including pictures of the soul leaving the body, may mislead us by suggesting applications which they, in fact, do not have. But pictures of the soul may enter people's lives as desires for a temporal eternity. Contrasting conceptions of immortality and eternal life depend on (...) a willingness to say farewell to life. Atheistic denials of temporal eternities, do not appreciate these other possibilities. (shrink)

Kierkegaard's leap of faith is one of the most thoroughly explored topics in modern philosophy. What can yet another inquiry into this notion hope to achieve? A number of significant things, I think, of both historical and systematic value. The main contention of this paper is that the leap of faith, often associated with the emergence of existentialism, is Kierkegaard's response to a problem which is essentially Kantian in origin and structure. Kierkegaard wants to accomodate both the Kantian interpretation of (...) morality as rational command and Kant's insistence on morality as the sole point of access to religion, while rejecting the Kantian moralization of religion and rationalization of faith. The leap of faith is not, as existentialism would have it, an absolute beginning in philosophy or in individual reflection but a transition from morality to religion within an essentially Kantian context. (shrink)

COMPARING LAW COMPARING RELIGION -- THE SCIENTIFIC STUDY OF RELIGION AND ITS CULTURED DESPISERS -- INTRODUCING RELIGION -- Index of Authors.

Some philosophers defend the view that epistemic agents believe by lending credence. Others defend the view that such agents lend credence by believing. It can strongly appear that the disagreement between them is notational, that nothing of substance turns on whether we are agents of one sort or the other. But that is demonstrably not so. Only one of these types of epistemic agent, at most, could manifest a human-like configuration of attitudes; and it turns out that not both types (...) of agent are possible. (shrink)

In his well-known Discourse on Metaphysics , Leibniz puts individual substance at the basis of metaphysical building. In so doing, he connects himself to a venerable tradition. His theory of individual concept, however, breaks with another idea of the same tradition, that no account of the individual as such can be given. Contrary to what has been commonly accepted, Leibniz’s intuitions are not the mere result of the transcription of subject-predicate logic, nor of the uncritical persistence of some old metaphysical (...) assumptions. They grow, instead, from an unprejudiced inquiry about our basic ontological framework, where logic of truth, linguistic analysis, and phenomenological experience of the mind’s life are tightly interwoven. Leibniz’s struggle for a concept capable of grasping concrete individuals as such is pursued in an age of great paradigm changes – from the Scholastic background to Hobbes’s nominalism to the Cartesian ‘way of ideas’ or Spinoza’s substance metaphysics – when the relationships among words, ideas and things are intensively discussed and wholly reshaped. This is the context where the genesis and significance of Leibniz’s theory of ‘complete being’ and its concept are reconstrued. The result is a fresh look at some of the most perplexing issues in Leibniz scholarship, like his ideas about individual identity and the thesis that all its properties are essential to an individual. The questions Leibniz faces, and to which his theory of individual substance aims to answer, are yet, to a large extent, those of contemporary metaphysics: how to trace a categorial framework? How to distinguish concrete and abstract items? What is the metaphysical basis of linguistic predication? How is trans-temporal sameness assured? How to make sense of essential attributions? In this ontological framework Leibniz’s further questions about the destiny of human individuals and their history are spelt out. Maybe his answers also have something to tell us. This book is aimed at all who are interested in Leibniz’s philosophy, history of early modern philosophy and metaphysical issues in their historical development. (shrink)

The cipher of the zodiac Content Type Journal Article Category Book Symposium Pages 1-22 DOI 10.1007/s11016-012-9674-1 Authors Robert Fox, Faculty of History, Oxford University, George Street, Oxford, OX1 2RL UK Charles C. Gillispie, Program in History of Science, Department of History, Princeton University, Princeton, NJ 08544, USA Theresa Levitt, Department of History, University of Mississippi, 310 Bishop Hall, University, MS 38677, USA David Aubin, Institut de Mathématiques de Jussieu, Histoire des sciences mathématique, UPMC - case postale 247, 4, place Jussieu, (...) 75252 Paris cedex 05, France Jed Z. Buchwald, Humanities and Social Sciences 101-40, Caltech, 1200 East California Blvd., Pasadena, CA 91125, USA Diane Greco Josefowicz, Writing Program, College of Arts and Sciences, Boston University, 730 Commonwealth Ave., Rm. 301, Boston, MA 02215, USA Journal Metascience Online ISSN 1467-9981 Print ISSN 0815-0796. (shrink)

Este artículo pretende exponer algo del tema de la bella y buena muerte en la épica griega arcaica y apuntar los profundos cambios ocurridos con Sócrates, según textos de Platón y Xenofonte, cambios que son fundamentales todavía para nuestras categorías éticas actuales. Se trata del tránsito desde una concepción épico-aristocrática de la bella muerte a ser entendida ésta como corolario de una vida iluminada por la reflexión.

Bell's review of H.G. Callaway's new edition of William James' 1909 book, A Pluralistic Universe.

Successfully explaining and replicating the complexity and generality of human and animal learning will require the integration of a variety of learning mechanisms. Here, we introduce a computational model which integrates associative learning (AL) and reinforcement learning (RL). We contrast the integrated model with standalone AL and RL models in three simulation studies. First, a synthetic grid-navigation task is employed to highlight performance advantages for the integrated model in an environment where the reward structure is both diverse and dynamic. The (...) second and third simulations contrast the performances of the three models in behavioral experiments, demonstrating advantages for the integrated model in accounting for behavioral data. (shrink)

Reinforcement learning (RL) models of decision-making cannot account for human decisions in the absence of prior reward or punishment. We propose a mechanism for choosing among available options based on goal-option association strengths, where association strengths between objects represent previously experienced object proximity. The proposed mechanism, Goal-Proximity Decision-making (GPD), is implemented within the ACT-R cognitive framework. GPD is found to be more efficient than RL in three maze-navigation simulations. GPD advantages over RL seem to grow as task difficulty is increased. (...) An experiment is presented where participants are asked to make choices in the absence of prior reward. GPD captures human performance in this experiment better than RL. (shrink)

When we use secure computer systems, we engage with carefully orchestrated and ordered interactions called “security ceremonies”, all of which exist to assure security. A great deal of attention has been paid to improving the usability of these ceremonies over the last two decades, to make them easier for end-users to engage with. Yet, usability improvements do not seem to have endeared end users to ceremonies. As a consequence, human actors might subvert the ceremony’s processes or avoid engaging with it. (...) Here, we consider whether beautification could be one way of making ceremonies more appealing. To explore beautification in this context, we carried out three studies. Study 1 surveyed 250 participants to derive a wide range of potential dimensions of “beautiful ceremonies”. These statements were sorted into dominant themes and converted into statements, which fed into the second study, with 309 respondents, to reveal the dominant dimensions constituting beauty. Study 3 asked 41 participants to carry out a Q-sort, which revealed the ways that people combine the identified dimensions when characterising security ceremonies as “beautiful”. These studies have allowed us to pin down the perceived dimensions of beauty in the context of security ceremonies, and also to understand how people combine these dimensions in different ways in judging security ceremonies to be beautiful, confirming the old adage of beauty being “in the eye of the beholder”. We conclude by highlighting the constraints imposed by the overarching requirement for security to be maintained in the face of any usability improvements and beautification endeavours. (shrink)

In a series of lectures on minds and persons, I am going to take advantage of the occasion to ask what kind of person should one be if one has a philosophical mind. I ask the question because it is itself a philosophically contentious issue. Indeed, I shall be offering answers in a climate which is generally hostile to them. I want to aise the issue in three contexts: first, in relation to questions which have been treated epistemologically, but which (...) I think belong to logic; second in relation to miracles; and third in relation to moral convictions. I shall spend most of my time on the first context. (shrink)

In his 1950 Marett Lecture, Professor Evans-Pritchard gave an account of important methodological developments which had taken place in social anthropology. I should like to use the occasion to concentrate on some of the deep contemporary divisions in another subject which interested R. R. Marett, namely, the philosophy of religion. I shall do so, however, by reference to some of the methodological issues which concerned Evans-Pritchard.

It has been said that the tendency to make use of examples drawn from literature in discussing problems in moral philosophy is not only dangerous, but needless. Dangers there certainly are, but these have little to do with the reasons offered for the needlessness of such examples. Examples drawn from literature, it is said, introduce an unnecessary complexity into one's philosophising. Indeed, as Peter Winch has pointed out, according to ‘a fairly well-established … tradition in recent Anglo-Saxon moral philosophy … (...) it is not merely permissible, but desirable, to take trivial examples. The rationale of this view is that such examples do not generate the emotion which is liable to surround more serious cases and thus enable us to look more coolly at the logical issues involved’, and it carries the implication that ‘moral concerns can be examined quite apart from any consideration of what it is about these concerns which makes them important to us’. (shrink)

In approaching the topic, ‘Objectivity and Cultural Divergence’, there is little doubt that certain styles of philosophizing will conceive of the task confronting them as that of devising or at least calling attention to standards of rationality by which distinctions between objectivity and divergence are to be drawn. This mode of philosophizing is marked by the confidence it has in its own methods. It seldom occurs to it to question its own operations; to ask whether the heterogeneity of our culture (...) does not itself create difficulties for the practice of philosophy. It is to such questionings as these, however, that I want to direct attention in this lecture. (shrink)

There is a well-known remark in Wittgenstein's Philosophical Investigations which even some philosophers sympathetic to his work have found very hard to accept. It reads: Philosophy may in no way interfere with the actual use of language; it can in the end only describe it. For it cannot give it any foundation either. It leaves everything as it is. Surely, it is said, that is carrying matters too far. Wittgenstein's hyperbole should be excused as a harmless stylistic flourish.

In his paper, ‘The Aroma of Coffee’, H. O. Mounce wants to expose what he takes to be a deep prejudice in philosophy, one which is at work in our culture more generally. Philosophers are reluctant to admit that there is anything which passes beyond human understanding. Of course, they are quite ready to admit that there are plenty of things that they fail to understand but this they would say simply happens to be the case. It does not mean (...) that what they fail to understand is something which is beyond human understanding. Thus even when they fail to understand something, that ‘something’ remains, in principle, within the reach of their understanding. For Mounce this prejudice flies in the face of what is platitudinously obvious: that there is much that passes beyond human understanding. (shrink)