The iCat is a user-interface robot with the ability to express a range of emotions through its facial features. This article summarizes our research to see whether we can increase the believability and likability of the iCat for its human partners through the application of gaze behaviour. Gaze behaviour serves several functions during social interaction such as mediating conversation flow, communicating emotional information and avoiding distraction by restricting visual input. There are several types of eye and head movements that are (...) necessary for realizing these functions. We designed and evaluated a gaze behaviour system for the iCat robot that implements realistic models of the major types of eye and head movements found in living beings: vergence, vestibulo ocular reflexive, smooth pursuit movements and gaze shifts. We discuss how these models are integrated into the software environment of the iCat and can be used to create complex interaction scenarios. We report about some user tests and draw conclusions for future evaluation scenarios. (shrink)

Engineers use neural networks to control systems too complex for conventional engineering solutions. To examine the behavior of individual hidden units would defeat the purpose of this approach because it would be largely uninterpretable. Yet neurophysiologists spend their careers doing just that! Hidden units contain bits and scraps of signals that yield only arcane hints about network function and no information about how its individual units process signals. Most literature on single-unit recordings attests to this grim fact. On the other (...) hand, knowing a system's function and describing it with elegant mathematics tell one very little about what to expect of interneuronal behavior. Examples of simple networks based on neurophysiology are taken from the oculomotor literature to suggest how single-unit interpretability might decrease with increasing task complexity. It is argued that trying to explain how any real neural network works on a cell-by-cell, reductionist basis is futile and we may have to be content with trying to understand the brain at higher levels of organization. (shrink)

Ocular gene transfer clinical trials are raising hopes for blindness treatments and attracting media attention. News media provide an accessible health information source for patients and the public, but are often criticized for overemphasizing benefits and underplaying risks of novel biomedical interventions. Overly optimistic portrayals of unproven interventions may influence public and patient expectations; the latter may cause patients to downplay risks and over-emphasize benefits, with implications for informed consent for clinical trials. We analyze the news media communications landscape (...) about ocular gene transfer and make recommendations for improving communications between clinicians and potential trial participants in light of media coverage. (shrink)

The postulate that events in peripheral vision enhance activity in the “fixate center” is called into question. An alternative explanation is used to account for the “remote distractor effect.” It is pointed out that a critical element of the model is missing.

The achievement of unity and perfection in human action begins with a struggle for these ideals in human thought. Dr. Klaus Vondung in his collection of essays that span four decades explores examples of this in different fields of human inquiry: striving for harmonious existential unity of talents and morals, intellect and emotion; seeking to make natural sciences consonant with the humanities and thereby moving toward a more universal, "perfect" science; and establishing unity in political structures and cultivating in this (...) unity a homogenous society. Vondung has given special devotion to National Socialism as a context wherein he revisits its perverted motivation and the consequences of this despite noble ideals. Particular focus in following the thread of unity and perfection in human intellectual and practical ambitions ultimately hones in on the combination of religion and politics. Vondung in these essays unpacks the ways in which this continues to fascinate and disturb us, and in his expertise he uses National Socialism to connect this pursuit of unity and perfection to what he calls one of the signature marks of modernity--namely, secular apocalypticism. This claim stands in opposition to Eric Voegelin's remark that Gnosticism, rather, is "the nature of modernity." Vondung, who studied and wrote his dissertation under Voegelin, grapples with the contrast of these positions. Vondung is willing to challenge Voegelin, but ultimately his treatment of the latter bears the quality of tribute to this great scholar. Vondung also explores the points of contact between apocalypticism and Hermetic speculation. Despite the independence of the religious and philosophical doctrines of Hermeticism, there are parallels to be found. Apocalypticism and Hermeticism originated in antiquity and yet each represents a tradition that still holds footing today. Vondung furthermore leads the reader to see the project of salvation found in both even as each operates with a different scope. This collection of essays centers itself on a perspective of the human pursuit of unity and perfection, directly or indirectly, as objectives of intellectual endeavors, existential ideals, as social or political outcomes, and in the case of National Socialism even as perverse aberrations. Vondung's particular treatment of Voegelin's work likewise establishes what the former identifies as a stand-out question of this study: Does the search of order in history show us the unity of the history of humankind? (shrink)

The rapid economic growth and surge of consumerism in emerging markets have placed significant pressure on the environment and consumers. While well-researched ethical consumption remedies may be effective in the Western contexts, they may not be readily translatable in emerging markets due to institutional and socio-cultural differences. This research examines the popular practice of Danshari in China and investigates how this self-oriented practice leads to other-oriented ethical consumption behaviours. Using qualitative data gathered from online sharing and interviews, we unpack how (...) Danshari practitioners question and reshape their relationship with possessions and consumption to enhance their self-concept clarity. This clarified and elevated self-concept, in turn, leads to ethical consumption behaviours. Unlike Western ethical consumption concepts that are driven by principles or ideologies, Danshari’s essence of detachment, self-orientation, and action focus resonate with traditional Chinese teachings, providing a pragmatist approach to cultivating ethical consumption behaviours in China. This research adds to the growing body of pragmatism-based ethics research, expands the discussion of the link between consumption and the self, and offers valuable insights into promoting ethical consumerism in emerging markets. (shrink)

The human fovea is known for its distinctive pit‐like appearance, which results from the displacement of retinal layers superficial to the photoreceptors cells. The photoreceptors are found at high density within the foveal region but not the surrounding retina. Efforts to elucidate the mechanisms responsible for these unique features have ruled out cell death as an explanation for pit formation and changes in cell proliferation as the cause of increased photoreceptor density. These findings have led to speculation that mechanical forces (...) acting within and on the retina during development underly the formation of foveal architecture. Here we review eye morphogenesis and retinal remodeling in human embryonic development. Our meta‐analysis of the literature suggests that fovea formation is a protracted process involving dynamic changes in ocular shape that start early and continue throughout most of human embryonic development. From these observations, we propose a new model for fovea development. (shrink)

Sometimes inquirers may rationally pursue a theory even when the available evidence does not favor that theory over others. Features of a theory that favor pursuing it are known as considerations of promise or pursuitworthiness. Examples of such reasons include that a theory is testable, that it has a useful associated analogy, and that it suggests new research and experiments. These reasons need not be evidence in favor of the theory. This raises the question: what kinds of reasons are provided (...) by pursuitworthiness considerations? Are they epistemic reasons or practical reasons? I argue that pursuitworthiness considerations are a kind of non-evidential epistemic reason, which I call an inquisitive reason. In support of this, I first point out two important similarities between the traditional pursuitworthiness considerations discussed in philosophy of science, which I call promise reasons, and certain social epistemic reasons that I call social inquisitive reasons. Specifically, both kinds of reason (1) favor pursuing a theory in a non-evidential way, and (2) concern promoting successful inquiry. I then propose recognition of a new category of normative reason: inquisitive reasons. This category contains both promise and social inquisitive reasons. Finally, I argue that inquisitive reasons share three essential features with previously recognized epistemic reasons: a connection to epistemic aims, explanatory independence, and the presence of a specific right-kind/wrong-kind reasons distinction. Each of these features have been used to argue that evidence should be treated as part of a distinct, independent domain of epistemic normativity. Since inquisitive reasons share these features, they too should be considered part of this independent epistemic domain. Thus, inquisitive reasons, including pursuitworthiness considerations, are epistemic reasons. (shrink)

" This is a key book for understanding the effort that a major philosopher has made a large part of his life's work: to naturalize epistemology in the twentieth ...

In "Pursuits of Wisdom," John Cooper brings this crucial question back to life. This marvelous book will shape the way we think about and engage with ancient philosophical traditions.

Unshakable Pursuit, a 30-day devotional, calls you to recognize God's eternal momentum at work in those fully engaged in His story.

This book defines Christian epistemological orthodoxy against such heterodox systems as Kantian phenomenology, Barthian Neoorthodoxy, Ayerian Logical Positivism, and Whiteheadian Process Thought and their respective trajectories.

Aesthetic Pursuits is a new collection of essays from Jerrold Levinson, one of the most prominent philosophers of art today, focusing on literature, film, and visual art, while addressing issues of humour, beauty, and the emotions. More than half of the essays in the volume are previously unpublished.

Dan Haybron presents an illuminating examination of well-being, drawing on important recent work in the science of happiness. He shows that we are remarkably prone to error in judgements of our own personal welfare, and suggests that we should rethink traditional assumptions about the good life and the good society.

Modern reflection about the good life and the good society has been dominated by a spirit of liberal optimism, according to which people typically know what’s good for them and make prudent choices in pursuit of their interests. As a result, people tend to do best, and pretty well at that, when given the greatest possible freedom to live as they wish. This appealing doctrine rests on a bold assumption about human psychology: namely, that people have a high degree (...) of aptitude for securing their well-being given arbitrarily high levels of “option freedom.” Yet a large body of empirical research suggests that people are systematically prone to make a variety of serious errors in the pursuit of happiness. These errors are probably serious enough to place liberal optimism’s psychological assumptions in doubt. If people do tend to fare best in the option-rich environments traditionally favored by liberal moderns, notably classical economists, this may not be mainly through the prudent exercise of choice. Or perhaps human beings actually benefit from certain constraints or burdens on choice. (shrink)

Utilitarianism is one of the most famous ethical doctrines, based on the ideal of maximizing pleasure and minimizing pain. But Utilitarians and their opponents lack a clear scientific and philosophical understanding of its foundations, the measurement and aggregation of utility. This is what The Pursuit of Happiness now offers.

Novelty—the value of saying something new—appears to be a good-making feature of a philosophical contribution. Beyond this, however, novelty functions as a metric of success. This paper challenges the presumption and expectation that a successful philosophical contribution will be a novel one. As I show, the pursuit of novelty is neither as desirable nor as feasible as it might initially seem.

We evaluate here the performance of four models of cross-situational word learning: two global models, which extract and retain multiple referential alternatives from each word occurrence; and two local models, which extract just a single referent from each occurrence. One of these local models, dubbed Pursuit, uses an associative learning mechanism to estimate word-referent probability but pursues and tests the best referent-meaning at any given time. Pursuit is found to perform as well as global models under many conditions (...) extracted from naturalistic corpora of parent-child interactions, even though the model maintains far less information than global models. Moreover, Pursuit is found to best capture human experimental findings from several relevant cross-situational word-learning experiments, including those of Yu and Smith (), the paradigm example of a finding believed to support fully global cross-situational models. Implications and limitations of these results are discussed, most notably that the model characterizes only the earliest stages of word learning, when reliance on the co-occurring referent world is at its greatest. (shrink)

What accounts for the prestige of quantitative methods? The usual answer is that quantification is desirable in social investigation as a result of its successes in science. Trust in Numbers questions whether such success in the study of stars, molecules, or cells should be an attractive model for research on human societies, and examines why the natural sciences are highly quantitative in the first place. Theodore Porter argues that a better understanding of the attractions of quantification in business, government, and (...) social research brings a fresh perspective to its role in psychology, physics, and medicine. Quantitative rigor is not inherent in science but arises from political and social pressures, and objectivity derives its impetus from cultural contexts. In a new preface, the author sheds light on the current infatuation with quantitative methods, particularly at the intersection of science and bureaucracy. (shrink)

Luca Del Baldo's Visionary Academy of Ocular Mentality is an extraordinary testament in the recent history of visual studies. It brings together a group of outstanding scholars who have devoted their lives to art history, philosophy, history, ethnology, focussing predominantly on questions of human perception and imagination. Working from photographs provided by the scholars, Luca del Baldo painted his series of 96 portraits reproduced in this book. The portraits are accompanied by texts written by the persons portrayed, in response (...) to their portrayal, and as an exchange: the artist gifted the original painting to the portrayed person, and the portrayed gifted her or his response. "The result is a unique and profound conversation between image and text focussed on the enigma of the human face in all its mediations.". (shrink)

The thesis that probabilities of conditionals are conditional probabilities has putatively been refuted many times by so-called ‘triviality results’, although it has also enjoyed a number of resurrections. In this paper I assault it yet again with a new such result. I begin by motivating the thesis and discussing some of the philosophical ramifications of its fluctuating fortunes. I will canvas various reasons, old and new, why the thesis seems plausible, and why we should care about its fate. I will (...) look at some objections to Lewis’s famous triviality results, and thus some reasons for the pursuit of further triviality results. I will generalize Lewis’s results in ways that meet the objections. I will conclude with some reflections on the demise of the thesis—or otherwise. (shrink)

A recent special issue in the Journal of Business Ethics gathered together a variety of papers addressing the challenges of putting virtue ethics into practice :563–565, 2013). The editors prefaced their outline of the various papers with the assertion that exploring the practical dimension of virtue ethics can help business leaders discover their proper place in working for a better world, as individuals and within the family, the business community and society in general :563–565, 2013). Scholars are yet to explore (...) the role of virtuous organisational leaders in the pursuit of Eudaimonia. This paper is a qualitative study which considered company directors’ self-understandings in light of a virtue ethics conceptual framework. The aim of the study is to explore whether virtue ethics rather than deontology and consequentialism is a better vehicle for expressing directors’ self-understandings about their ideals and role. (shrink)

This brief report presents the global problem of the shortfall of donor corneal tissue for transplantation, a potential root cause (‘ick factor’ language), and a potential solution (modification of ‘ick factor’ language). Specifically, use of the term ‘eye donation’ is a potential hurdle to ocular tissue donation as it can stimulate the ‘ick factor.’ Verbiage such as ‘ocular (eye tissue)’ could be a method of providing terminology that is less emotive than ‘eye donor’ or ‘eye donation.’ The field (...) of transplantation has experienced terminology shifts over time; for example, ‘cadaver’ has been replaced with ‘deceased donor,’ ‘harvest’ has been replaced with ‘recover,’ and ‘life support’ has been replaced with ‘ventilated.’ Notably, only a small number of regions worldwide are using ‘ocular’ terminology, yet it could be an important step to enhancing the informed consent process and improving donation rates, potentially increasing transplant and optimising patient quality of life for those with treatable blindness. (shrink)

Luis Morales Dept. de Psicología y Sociología, Universidad de Zaragoza, España Los movimientos oculares nos informan acerca del procesamiento lingüístico. … Read More →.

Drawing on diverse historical cases, this paper describes and examines various aspects of a modality of scientific appraisal which has remained largely unexplored, theory pursuit. Specifically, it addresses the following issues: the epistemic and pragmatic commitments involved in theory pursuit, including how these differ from those characteristic of theory acceptance; how the research interests of scientists enter into their pursuit decisions; some of the strategies for the refinement and extension of a theory's empirical abilities which typify theory (...) pursuit; and the need to distinguish between individual and community rationality in contexts of pursuit. (shrink)

"Socrates' Pursuit of Definitions" examines the manner in which Socrates pursues definitions in Plato's early definitional dialogues and advances the following claims. Socrates evaluates definitions (proposed by his interlocutors or himself) by considering their consistency with conditions of the identity of F (F-conditions) to which he is committed. In evaluating proposed definitions, Socrates seeks to determine their truth-value. Socrates evaluates the truth-value of a proposed definition by considering the consistency of the proposed definition with F-conditions that F he believes (...) to be true. (For instance, a proposed definition's inconsistency with one of these gives Socrates reason to believe that the definition is false.) Socrates' belief in the truth of a given F-condition to which he is committed may be based on self-evidence, its endoxic status, experience, or deduction from premises to which he is committed on the basis of any of the previous three. However, Socrates does not consider the epistemological grounds of his commitments to his F-conditions. This is part of a general avoidance of metaethical and ethical epistemological issues. Due to his avoidance of these, Socrates' pursuit of true definitions is theoretically naïve. However, Socrates recognizes a certain limitation to his manner of pursuing definitions. These results are applied to advancing the following further points. (1) Although Socrates has a distinctive manner or style of pursuing definitions, it is inappropriate to ascribe to him a method of doing so in the following sense. The concept of method implies a certain theoretical conception of procedure that Socrates lacks. Moreover, according to Socrates' own conceptual framework, only one who possessed the relevant τέχνη would have a method. (2) Furthermore, Socrates' manner of pursuing definitions is not elenctic just insofar as the word "elenchus" is interpreted to have adversarial connotations; that is inconsistent with Socrates' motives and interests. (3) Socrates' manner of pursuing definitions is consistent among the early definitional dialogues. More specifically, there is no "demise of the elenchus" in a set of transitional dialogues, as Vlastos describes it. First, Socrates' manner of pursuing definitions is not "elenctic" (in the sense described). And, second, the fact that Socrates himself proposes definitions in allegedly post-elenctic dialogues (that is, Lysis and Hippias Major) is consistent with his manner of pursuing definitions. (4) In the early definitional dialogues, Socrates does not have a theory of definition. In particular, he lacks a general theoretical ontology. Moreover, while his comments and implicit commitments entail beliefs about some conditions for a satisfactory definition (for example, that the definiens must be a uniquely identifying true verbal description), such conditions do not constitute a theory. (5) Although in other early dialogues and in other parts of the definitional dialogues Socrates may express concern over the psychological states and well-being of his interlocutors, in the process of pursuing definitions, Socrates' principal concern is the evaluation of definitions, not the psychologies or lives of his interlocutors. (6) Finally, Socrates is committed to the epistemological priority of definitional knowledge for pertinent non-definitional knowledge. This does present a methodological problem of the kind to which Geach first drew attention. Specifically, according to the manner in which Socrates pursues definitions, it is unclear how he can get from belief that p to knowledge that p. Although this problem is genuine, Socrates himself is not unaware of such limits of his approach. (shrink)

During development of the anterior eye segment, cells that originate from the surface epithelium or the neuroepithelium need to interact with mesenchymal cells, which predominantly originate from the neural crest. Failures of proper interaction result in a complex of developmental disorders such Peters' anomaly, Axenfeld–Rieger's syndrome or aniridia. Here we review the role of transcription factors that have been identified to be involved in the coordination of anterior eye development. Among these factors is PAX6, which is active in both epithelial (...) and mesenchymal cells during ocular development, albeit at different doses and times. We propose that PAX6 is a key element that synchronizes the complex interaction of cell types of different origin, which are all needed for proper morphogenesis of the anterior eye. We discuss several molecular mechanisms that might explain the effects of haploinsufficiency of PAX6 and other transcription factors, and the broad variation of the resulting phenotypes. BioEssays 26:374–386, 2004. © 2004 Wiley Periodicals, Inc. (shrink)

In this article I suggest a tripartite classification of scientific activity; discovery, pursuit, and justification. I believe that such a classification can give us a more adequate description of scientific practice, help illuminate the various roles that evidence plays in science, and may also help to partially resolve differences between “constructivist” and “epistemologist” views of science. I argue that although factors suggested by the constructivists such as career goals, professional interests, utility for future practice, and agreement with existing commitments (...) do enter into pursuit, it is experimental evidence that is decisive in justification. I illustrate this with two case studies from the history of contemporary science, experiments on atomic parity violation and their relation to the Weinberg-Salam unified theory of electroweak interactions and the fifth force in gravity. I also answer some of the criticisms offered of my earlier account of the episode of atomic parity violation. (shrink)

Scientists often diverge widely when choosing between research programs. This can seem to be rooted in disagreements about which of several theories, competing to address shared questions or phenomena, is currently the most epistemically or explanatorily valuable—i.e. most successful. But many such cases are actually more directly rooted in differing judgments of pursuit-worthiness, concerning which theory will be best down the line, or which addresses the most significant data or questions. Using case studies from 16th-century astronomy and 20th-century geology (...) and biology, I argue that divergent theory choice is thus often driven by considerations of scientific process, even where direct epistemic or explanatory evaluation of its final products appears more relevant. Broadly following Kuhn’s analysis of theoretical virtues, I suggest that widely shared criteria for pursuit-worthiness function as imprecise, mutually-conflicting values. However, even Kuhn and others sensitive to pragmatic dimensions of theory ‘acceptance’, including the virtue of fruitfulness, still commonly understate the role of pursuit-worthiness—especially by exaggerating the impact of more present-oriented virtues, or failing to stress how ‘competing’ theories excel at addressing different questions or data. This framework clarifies the nature of the choice and competition involved in theory choice, and the role of alternative theoretical virtues. (shrink)