Sleep helps to protect and renew hippocampus-dependent declarative learning. Less is known about forms of learning that mainly engage the dopaminergic reward system. Animal studies showed that exogenous melatonin modulates the responses of the dopaminergic reward system and acts as a neuroprotectant promoting memory. In humans, melatonin is mainly secreted in darkness during evening hours supporting sleep. In this study, we investigate the effects of a short period of daytime sleep (nap) and endogenous melatonin on reward learning. Twenty-seven healthy, adult (...) students took part in an experiment, either taking a 90-min afternoon nap or watching videos (within-subject design). Before and after the sleep vs. wake interval, saliva melatonin levels and reward learning were measured, and in the nap condition, a polysomnogram was obtained. Reward learning was assessed using a two-alternative probabilistic reinforcement-learning task. Sleep itself and subjective arousal or valence had no significant effects on reward learning. However, this study showed for the first time that an afternoon nap can elicit a small but significant melatonin response in about 41% of the participants and that the magnitude of the melatonin response predicts subsequent reward learning. Only in melatonin responders did a short nap improve reward learning. The difference between melatonin-responders and non-responders occurred very early during learning indicating that melatonin might have improved working memory rather than reward learning. Future studies should use paradigms differentiating working memory and reward learning to clarify which aspect of human feedback learning might profit from melatonin. (shrink)

This major study examines the most fundamental categories in terms of which we conceive of ourselves, critically surveying the concepts of substance, causation, agency, teleology, rationality, mind, body and person, and elaborating the conceptual fields in which they are embedded. The culmination of 40 years of thought on the philosophy of mind and the nature of the mankind Written by one of the world’s leading philosophers, the co-author of the monumental 4 volume _Analytical Commentary on the Philosophical Investigations_ Uses broad (...) categories, such as substance, causation, agency and power to examine how we think about ourselves and our nature Platonic and Aristotelian conceptions of human nature are sketched and contrasted Individual chapters clarify and provide an historical overview of a specific concept, then link the concept to ideas contained in other chapters. (shrink)

Driven by interests in workforce planning and patient safety, a growing body of literature has begun to identify the reality and the prevalence of missed nursing care, also specified as care left undone, rationed care or unfinished care. Empirical studies and conceptual considerations have focused on structural issues such as staffing, as well as on outcome issues – missed care/unfinished care. Philosophical and ethical aspects of unfinished care are largely unexplored. Thus, while internationally studies highlight instances of covert rationing/missed care/care (...) left undone – suggesting that nurses, in certain contexts, are actively engaged in rationing care – in terms of the nursing and nursing ethics literature, there appears to be a dearth of explicit decision-making frameworks within which to consider rationing of nursing care. In reality, the assumption of policy makers and health service managers is that nurses will continue to provide full care – despite reducing staffing levels and increased patient turnover, dependency and complexity of care. Often, it would appear that rationing/missed care/nursing care left undone is a direct response to overwhelming demands on the nursing resource in specific contexts. A discussion of resource allocation and rationing in nursing therefore seems timely. The aim of this discussion paper is to consider the ethical dimension of issues of resource allocation and rationing as they relate to nursing care and the distribution of the nursing resource. (shrink)

This article, written by a former justice of the Supreme Court of India and chairman of the Press Council of India, describes the media accountability system in India and argues for the global necessity for such systems. It declares the need for free press systems for the survival of democratic institutions and claims that society has an obligation to monitor media systems so they remain free. The alternative will be government regulation, which will suspend the vital characteristics of a free (...) press. A press council, on the other hand, can work more cooperatively with the press to assure responsibility. Global forces make it important for the mass media to explore the virtues inherent in media accountability systems, such as press councils. This article suggests why those systems are increasingly important, proposes structures and functions for such councils, and uses the Press Council of India as an example of a working organization. (shrink)

Entertainments and celebrations are meant to give audiences and participants pleasure. Pleasure and enjoyment are an integral part of flourishing human life, and the desire for pleasure and enjoyment is a distinctive aspect of human nature. Psychological hedonism is a descriptive doctrine concerned with giving an account of actual human motivation. Ethical hedonism is a prescriptive doctrine that advances the view that human beings ought to pursue pleasure and avoid pain, that prospective pleasure and pain are severally the only good (...) reasons for action. ‘Pleasure’, ‘enjoyment’, and ‘being pleased’ are three graces that stand at the intersection of psychology, axiology, and practical reasoning. The relation between pleasure and awareness or consciousness of pleasure is subtle and unlike the corresponding relation to having a pain. To live the life of a practical hedonist is to live a life guided by the pursuit of pleasure. (shrink)

Striving to find a simple characterization of the essence of the imagination, philosophers have argued that it consists in the power to call up before the mind mental images, either in recollection and recognition or in fancy. Wittgenstein's interest in the imagination focused upon six interrelated themes. First, the concept of imagination is associated with the concept of a mental image. Second, imagination is connected in various ways with perception. Third, the faculty of imagination is associated with artistic creativity and (...) no less so with intellectual creativity, with originality, insight and deviation from stock solutions to problems. Fourth, 'to imagine' is connected not only with intellectual creativity, but also more generally with thought, conception or supposition. Fifth, 'to imagine' is associated with false belief, mistaken memory and misperception. Finally, the imagination is connected with make‐believe, pretence, play‐acting or idle fancy. The multitude of grammatical similarities between the visual imagination and visual perception is deceptive. (shrink)

Upshot: Time constraints, locked curriculums, strict management, and possible anarchy in the classroom are some of the themes that originated from the commentaries. I argue that these challenges should be viewed holistically in the broader picture. I also question the educator’s role in mitigating these obstacles. My advice: Do it anyway.

This chapter contains sections titled: Background The Tractatus The role of the Tractatus in the history of analytic philosophy The collapse of the Tractatus vision The Philosophical Investigations Philosophy of language Philosophy of mind The critique of metaphysics and nature of philosophy Wittgenstein's place in postwar analytic philosophy Notes Bibliography.

The physical world consists of relatively enduring objects that exist in an objective spatiotemporal framework, that consist of matter of one kind or another, and that interact with each other in physical processes and events. In the course of his reflections on the idea of a private language, and more generally in his ruminations on psychology and the philosophy of psychology, Wittgenstein subjected the traditional philosophical picture to critical scrutiny. In every respect he found it a distortion of grammar in (...) the flawed mirror of metaphysics. The concept of pain‐location is parasitic on the concept of the sufferer from pain, for the location of a pain is where the sufferer points and where he avows it is. Frege presented the idea that pains (experiences in general) are inalienably owned by the person whose pains or experiences they are as a metaphysical insight into the essential nature of things. (shrink)

In reviewing Ellis' OCT of Catullus, Housman scorned the ‘diction and metre’ of Carm. 64.37, ‘Pharsaliam coeunt, Pharsalia tecta frequentant’. Yet several subsequent editors have agreed with Ellis and have also refrained from emending Pharsaliam. Even if there has not been enough discomfort with the MS reading to put some editors off retaining it, they might yet welcome a piece of positive evidence to support this decision. I will make the case that a passage in Statius' Achilleid may indicate that (...) the later poet was familiar with the line as the MSS have it. (shrink)