Working memory limits are best defined in terms of the complexity of the relations that can be processed in parallel. Complexity is defined as the number of related dimensions or sources of variation. A unary relation has one argument and one source of variation; its argument can be instantiated in only one way at a time. A binary relation has two arguments, two sources of variation, and two instantiations, and so on. Dimensionality is related to the number of chunks, because (...) both attributes on dimensions and chunks are independent units of information of arbitrary size. Studies of working memory limits suggest that there is a soft limit corresponding to the parallel processing of one quaternary relation. More complex concepts are processed by or In segmentation, tasks are broken into components that do not exceed processing capacity and can be processed serially. In conceptual chunking, representations are to reduce their dimensionality and hence their processing load, but at the cost of making some relational information inaccessible. Neural net models of relational representations show that relations with more arguments have a higher computational cost that coincides with experimental findings on higher processing loads in humans. Relational complexity is related to processing load in reasoning and sentence comprehension and can distinguish between the capacities of higher species. The complexity of relations processed by children increases with age. Implications for neural net models and theories of cognition and cognitive development are discussed. (shrink)

The core issue of our target article concerns how relational complexity should be assessed. We propose that assessments must be based on actual cognitive processes used in performing each step of a task. Complexity comparisons are important for the orderly interpretation of research findings. The links between relational complexity theory and several other formulations, as well as its implications for neural functioning, connectionist models, the roles of knowledge, and individual and developmental differences, are considered.

Cowan's review shows that a short-term memory limit of four items is consistent with a wide range of phenomena in the field. However, he does not explain that limit, whereas an existing theory does offer an explanation for capacity limitations. Furthermore, processing capacity limits cannot be reduced to storage limits as Cowan claims.

We propose that the missing link from nonhuman to human cognition lies with our ability to form, modify, and re-form dynamic bindings between internal representations of world-states. This capacity goes beyond dynamic feature binding in perception and involves a new conception of working memory. We propose two tests for structured knowledge that might alleviate the impasse in empirical research in nonhuman animal cognition.

Stanley Fish opens the collection with a persuasive argument for the role of intention and biography. Michael McKeon, Gordon Turnbull, and Jerome Christensen are concerned with the late eighteenth--and early nineteenth-century English cultural discourse that gave rise to the nearly simultaneous emergence of literary biography, Romantic sensibility, and reflexive human consciousness. The essays by Alison Booth, Cheryl Walker, and Sharon O'Brien reveal that the recognition or lack thereof the biographical subject has received and remains both a problem and an opportunity (...) for women writers and readers. The essays by Valerie Ross, Rob Wilson, Steven Weiland, and William Epstein pursue the question of difference and cultural reification in the theory and practice of a specifically American biography and biographical criticism. (shrink)

Thomas Jefferson and Philosophy: Essays on the Philosophical Cast of Jefferson’s Writings is a collection of essays on topics that relate to philosophical aspects of Jefferson’s thinking over the years. Much historical insight is given to ground the various philosophical strands in Jefferson’s thought and writing on topics such as political philosophy, moral philosophy, slavery, republicanism, wall of separation, liberty, educational philosophy, and architecture.

Edward O. Wilson’s recent decision to abandon kin selection theory has sent shockwaves throughout the biological sciences. Over the past two years, more than a hundred biologists have signed letters protesting his reversal. Making sense of Wilson’s decision and the controversy it has spawned requires familiarity with the historical record. This entails not only examining the conditions under which kin selection theory first emerged, but also the organicist tradition against which it rebelled. In similar fashion, one must not (...) only examine Wilson’s long career, but also those thinkers who influenced him most, especially his intellectual grandfather, William Morton Wheeler (1865–1937). Wilson belongs to a long line of organicists, biologists whose research highlighted integration and coordination, many of whom struggled over the exact same biological riddles that have long defined Wilson’s career. Drawing inspiration (and sometimes ideas) from these intellectual forebears, Wilson is confident that he has finally identified the origin of the social impulse. (shrink)

The concept of scientific history / Isaiah Berlin -- The limits of scientific history / W.H. Walsh -- The objectivity of history / J.A. Passmore -- Explanation in science and in history / C.G. Hempel -- The Popper-Hempel theory reconsidered / Alan Donagan -- The autonomy of historical understanding / Louis O. Mink -- Historical continuity and causal analysis / Michael Oakeshott -- Causal judgment in history and in the law / H.L.A. Hart and A.M. Honoré -- Causes, connections and (...) conditions in history / Michael Scriven -- The historical individual / A.C. Danto -- Methodological individualisms : definition and reduction / May Brodbeck -- Societal laws / Maurice Mandelbaum -- Determinism in history / Ernest Nagel. (shrink)

This update of the original version focuses on six central problems in the critical philosophy of history and explores the connections among them. Starting with the fundamentals of each philosophical topic in history and then delving into the specifics of each to better understand the surrounding issues, the reference first offers a comprehensive introduction into these topics then covers explanation and understanding ... objectivity and value judgment .. causes in history ... the nature and role of narrative ... and historical (...) determinism. Suitable for students, professors, and anyone else interested in the philosophy of history. (shrink)

Neurobiologist William Calvin explores the human brain, positing that the neurons in the brain operate in an accelerated version of biological evolution, evolving ideas through random variations and selections, and supports his hypothesis with numerous ca.

A systematic, rigorous, comprehensive, and unified overview of evolutionary game theory.

In lieu of an abstract, here is a brief excerpt of the content:Matter and Spirit in the Age of Animal MagnetismEric G. WilsonDuring the Romantic period, writers on both sides of the Atlantic explored the sleepwalker as a merger of holiness and horror. Emerging when scientific thinkers for the first time were connecting spirit to electricity and magnetism, the somnambulist became to certain Romantics a disclosure of the difficulty of harmonizing unseen and seen, agency and necessity. This problem prominently arose (...) in Anton Mesmer's late eighteenth-century experiments in animal magnetism, in which the sleepwalker proved a paradox: an opaque revelation of transparent currents and an unconscious vehicle of sophisticated thought. Romantics such as Coleridge embraced the somnambulist as an embodiment of these troubles involved in relating motion and meaning. Coleridge and those who responded to him saw in the hypnotized human this sobering possibility: the invisible requires the visible to make itself manifest while the visible needs the invisible to become significant. 1 This is sublime and sinister: to elevate a material form to spiritual power is transcendence; to sink the boundless into a body is grotesque.Here I explore the philosophical implications of animal magnetism, the place of the sleepwalker in the history of ideas, and the role of the hypnotized human in Romantic writers, especially Coleridge. I also meditate on relationships between matter and spirit, machine and human, word and thing. Along the way, I place the history of ideas and the works of Romantic writers in mutually illuminating dialogues. The literary texts shed fresh light on philosophical problems while the ideas reveal hidden literary elements.The somnambulistic trance had been around long before Mesmer's magnetic sleeps. For centuries, shamans had used auto-hypnosis to sound [End Page 329] their souls and other-hypnosis to cure their tribe-members' ailments. However, somnambulism could not become a scientific phenomenon until Europeans in laboratories began to study electricity and magnetism. In the early modern period, Paracelsus argued that a vital fluid courses through the cosmos. The human being draws this flow like a magnet attracts force. When the body pulls to itself evil effluvia, it falls ill. To return patients to health, Paracelsus placed magnets on painful areas. He hoped to extract the unwanted current and return it to the cosmic swirl. 2 In "magnetizing" spirit, Paracelsus opened a door for empirical inquiry into the invisible world. In 1600, William Gilbert claimed that magnets correspond to the earth: both are animated by universal attraction and repulsion. 3 By the end of the seventeenth-century, Newton proposed that things are impelled by a force that draws and repels. Newton's theory of gravity inspired natural philosophers of the next centuries to search for a principle of which the magnet and the spark are manifestations. 4During the second half of the eighteenth century and the early part of the nineteenth, natural philosophers explored electricity and magnetism with unprecedented precision. In 1752, Benjamin Franklin revealed the mystery of lightning and perhaps the spark of life. 5 Inspired by Franklin, F. C. Oetinger, J. L. Fricker, and Prokop Divisch developed a theology of electricity, based on the belief that God is the electrical current. 6 Later in the century, Luigi Galvani and Alessandro Volta debated over whether the galvanic flow might be the origin and principle of life itself. 7 A few years before Franklin harvested lightning, John Michell argued that the magnetic force is not constrained to lodestones but is possibly pervasive. Some years later, Franz Aepinus suggested that magnetism and electricity manifest a deep energy. Soon after, C. A. de Coulomb discovered the mathematical law by which electrical and magnetic forces operate (Whittaker, pp. 50–59).These findings led to the breakthroughs of the nineteenth century. 8 In 1807, Humphry Davy hypothesized that chemical elements interact through electromagnetic affinity or repulsion. 9 In 1820, H. C. Oersted demonstrated the correspondence between electricity and magnetism. The same year, A. M. Ampere formulated the laws by which electrical and magnetic currents interact (Whittaker, pp. 81–86). Michael Faraday in 1831 revealed electromagnetic induction and thus inaugurated a second Copernican revolution: he showed that matter is not solid and discrete but a field of electromagnetic energy. 10 The dreams of [End... (shrink)

Combining engaging discussions and stimulating new case studies, BUSINESS ETHICS: A TEXTBOOK WITH CASES gives students a comprehensive survey of business ethics that will guide them toward becoming ethical professionals, even if they have never studied philosophy before. Rich with real-world examples, BUSINESS ETHICS: A TEXTBOOK WITH CASES invites students to critically analyze and apply a broad range of philosophical concepts and principles to today's most important issues in business and beyond. BUSINESS ETHICS: A TEXTBOOK WITH CASES is a concise (...) (without readings) and updated version of the eleventh edition of MORAL ISSUES IN BUSINESS. BUSINESS ETHICS: A TEXTBOOK WITH CASES is also available in an eBook format. Important Notice: Media content referenced within the product description or the product text may not be available in the ebook version. (shrink)

"[This] book guides readers in thinking deeply about important moral issues that frequently arise in business situations and helps them develop the reasoning and analytical skills to resolve those issues. Combining insightful and accessible textbook chapters by the authors, cases that highlight the real-world importance of key ethical concepts, and reading selections from the most influential voices in contemporary ethical debates, this book provides a comprehensive, flexible, and pedagogically proven course of study exploring the intersections of commerce and ethics."--Book cover.

This book explains and defends a central ideas in the theory of history put forward by R. G. Collingwood, perhaps the foremost philosopher of history in the 20th century. Professor Dray analyses critically the idea of re-enactment, explores the limits of its applicability, and determines its relationship to other key Collingwoodian ideas, such as the role of imagination in historical thinking, and the indispensability of a point of view.

Aimed at undergraduates, _Contemporary Ethics_ presupposes little or no familiarity with ethics and is written in a clear and engaging style. It provides students with a sympathetic but critical guide to utilitarianism, explaining its different forms and exploring the debates it has spawned. The book leads students through a number of current issues in contemporary ethics that are connected to controversies over and within utilitarianism. At the same time, it uses utilitarianism to introduce students to ethics as a subject. In (...) these ways, the book is not only a guide to utilitarianism, but also an introduction to some standard problems of ethics and to several important topics in contemporary ethical theory. (shrink)

In the past two decades, reinforcement learning has become a popular framework for understanding brain function. A key component of RL models, prediction error, has been associated with neural signals throughout the brain, including subcortical nuclei, primary sensory cortices, and prefrontal cortex. Depending on the location in which activity is observed, the functional interpretation of prediction error may change: Prediction errors may reflect a discrepancy in the anticipated and actual value of reward, a signal indicating the salience or novelty of (...) a stimulus, and many other interpretations. Anterior cingulate cortex has long been recognized as a region involved in processing behavioral error, and recent computational models of the region have expanded this interpretation to include a more general role for the region in predicting likely events, broadly construed, and signaling deviations between expected and observed events. Ongoing modeling work investigating the interaction between ACC and additional regions involved in cognitive control suggests an even broader role for cingulate in computing a hierarchically structured surprise signal critical for learning models of the environment. The result is a predictive coding model of the frontal lobes, suggesting that predictive coding may be a unifying computational principle across the neocortex. (shrink)

The traditional view that all logical truths are metaphysically necessary has come under attack in recent years. The contrary claim is prominent in David Kaplan’s work on demonstratives, and Edward Zalta has argued that logical truths that are not necessary appear in modal languages supplemented only with some device for making reference to the actual world (and thus independently of whether demonstratives like ‘I’, ‘here’, and ‘now’ are present). If this latter claim can be sustained, it strikes close to the (...) heart of the traditional view. I begin this paper by discussing and refuting Zalta’s argument in the context of a language for propositional modal logic with an actuality connective (section 1). This involves showing that his argument in favor of real world validity his preferred explication of logical truth, is fallacious. Next (section 2) I argue for an alternative explication of logical truth called general validity. Since the rule of necessitation preserves general validity, the argument of section 2 provides a reason for affirming the traditional view. Finally (section 3) I show that the intuitive idea behind the discredited notion of real world validity finds legitimate expression in an object language connective for deep necessity. (shrink)

The pedagogical technique of the playful Plato, especially his ability to create living discourses that directly address the student, is the subject of Plato the Teacher. “The crisis of the Republic” refers to the decisive moment in his central dialogue when philosopher-readers realize that Plato’s is challenging them to choose justice by going back down into the dangerous Cave of political life for the sake of the greater Good, as both Socrates and Cicero did.