The effects of striatal dopamine (DA) on behavior have been widely investigated over the past decades, with “phasic” burst firings considered as the key expression of a reward prediction error responsible for reinforcement learning. Less well studied is “tonic” DA, where putative functions include the idea that it is a regulator of vigor, incentive salience, disposition to exert an effort and a modulator of approach strategies. We present a model combining tonic and phasic DA to show how different outflows triggered (...) by either intrinsically or extrinsically motivating stimuli dynamically affect the basal ganglia by impacting on a selection process this system performs on its cortical input. The model, which has been tested on the simulated humanoid robot iCub interacting with a mechatronic board, shows the putative functions ascribed to DA emerging from the combination of a standard computational mechanism coupled to a differential sensitivity to the presence of DA across the striatum. (shrink)

Learning social studies content is important for all students, including those with severe disabilities. However, there is a limited amount of research that specifically examines teaching social studies to this population of students. Therefore, educators must look to research-based practices in other academic areas (e.g., English language arts) to determine new strategies to teach this important content. Using a multiple probe across participants design, three fifth-grade students with severe disabilities were taught to answer comprehension questions during read-alouds of social studies (...) text using a modified system of least prompts and graphic organizer. Findings indicate all students improved on the correct number of comprehension questions answered independently. Implications for practice and ideas for future research to teach social studies to students with severe disabilities are discussed. (shrink)

Piéron's Law describes the relationship between stimulus intensity and reaction time. Previously (Stafford & Gurney, 2004), we have shown that Piéron's Law is a necessary consequence of rise-to-threshold decision making and thus will arise from optimal simple decision-making algorithms (e.g., Bogacz, Brown, Moehlis, Holmes, & Cohen, 2006). Here, we manipulate the color saturation of a Stroop stimulus. Our results show that Piéron's Law holds for color intensity and color-naming reaction time, extending the domain of this law, in line with (...) our suggestion of the generality of the processes that can give rise to Piéron's Law. In addition, we find that Stroop condition does not interact with the effect of color saturation; Stroop interference and facilitation remain constant at all levels of color saturation. An analysis demonstrates that this result cannot be accounted for by single-stage decision-making algorithms which combine all the evidence pertaining to a decision into a common metric. This shows that human decision making is not information-optimal and suggests that the generalization of current models of simple perceptual decision making to more complex decisions is not straightforward. (shrink)

Includes bibliographical references and index.

The nature of Marx's ethics has been a matter of considerable dispute since the latter part of the nineteenth century. Some have maintained that Marx had no ethics; others have claimed that his ethics is Kantian; and yet others have maintained that his ethics is utilitarian. The first two views were prominent at the turn of the century. It is the utilitarian view that seems to hold favor among a great many today. Thus Adam Schaff has claimed that ‘Marxist theory (...) … leads to the general position that may be called “social hedonism” —the view that the aim of human life is to secure the maximum happiness for the broadest masses of the people … ’ Similarly, Derek Allen has claimed that ‘it is possible … to show that the arguments which support [Marx's and Engels’] moral judgments are utilitarian in all but name.’. (shrink)

The nature of Marx's ethics has been a matter of considerable dispute since the latter part of the nineteenth century. Some have maintained that Marx had no ethics; others have claimed that his ethics is Kantian; and yet others have maintained that his ethics is utilitarian. The first two views were prominent at the turn of the century. It is the utilitarian view that seems to hold favor among a great many today. Thus Adam Schaff has claimed that ‘Marxist theory (...) … leads to the general position that may be called “social hedonism” —the view that the aim of human life is to secure the maximum happiness for the broadest masses of the people … ’ Similarly, Derek Allen has claimed that ‘it is possible … to show that the arguments which support [Marx's and Engels’] moral judgments are utilitarian in all but name.’. (shrink)

This book addresses a wide range of topics relating to the properties and behavior of condensed matter under extreme conditions such as intense magnetic and electric fields, high pressures, heat and cold, and mechanical stresses. It is divided into four sections devoted to condensed matter theory, molecular chemistry, theoretical physics, and the philosophy and history of science. The main themes include electronic correlations in material systems under extreme pressure and temperature conditions, surface physics, the transport properties of low-dimensional electronic systems, (...) applications of the density functional theory in molecular systems, and graphene. The book is the outcome of a workshop held at the University of Catania, Italy, in honor of Professor Renato Pucci on the occasion of his 70th birthday. It includes selected invited contributions from collaborators and co-authors of Professor Pucci during his long and successful career, as well as from other distinguished guest authors. (shrink)

The AGI alignment problem has a bimodal distribution of outcomes with most outcomes clustering around the poles of total success and existential, catastrophic failure. Consequently, attempts to solve AGI alignment should, all else equal, prefer false negatives (ignoring research programs that would have been successful) to false positives (pursuing research programs that will unexpectedly fail). Thus, we propose adopting a policy of responding to points of philosophical and practical uncertainty associated with the alignment problem by limiting and choosing necessary assumptions (...) to reduce the risk of false positives. Herein we explore in detail two relevant points of uncertainty that AGI alignment research hinges on---meta-ethical uncertainty and uncertainty about mental phenomena---and show how to reduce false positives in response to them. (shrink)

The theoretical and practical problems of providing incentives for people's activity in society are becoming increasingly more urgent as the role of the human factor in the development of society grows. In light of modern historical experience, we can see the onesidedness of conceptions according to which the types and directions of activity are mechanically predetermined by conditions external to it, and we can see the necessity of understanding the laws of activity itself in all their complicated dialectical essence. These (...) problems have become particularly important at the present stage of development of Soviet society, when a greater active involvement of the masses and profound changes in social psychology are becoming acutely necessary. (shrink)

(1996). The notion of citizenship in France and its redefinition. The European Legacy: Vol. 1, Fourth International Conference of the International Society for the study of European Ideas, pp. 575-579.

system reflected in Saussure's linguistic theory, and so influential in the great progress linguistic theory has made in this century. Indeed, Granger sees linguistic theory as expressing a paradigm for scientific theorizing, which research in other social sciences should adopt. But 'structuralism' as a method in science does not, in Granger's view, begin with Saussure and the linguists. It is nothing less than the strategy of all the sciences, both natural and social, since their beginnings. Now, 'structuralism' is a 'trendy' (...) term no less in Anglophone methodology than in Francophone philosophy. But Granger's employment of the term is not to be assimilated to this trend, nor to the fashionable excesses for which this expression has been a watch word (he explicitly separates himself from this movement in the preface to the second edition). The exact nature of what Granger calls 'structuralist' methods is the subject of a large part of this work, and I will not dwell on it much further in this introduction. Suffice it to say that Granger's demand for structuralist description is nothing less than the recognition that the successful pursuit of science requires that its terms and predicates pick out what we may call 'natural kinds'; that is, describe classes of items that bear uniform nomolog ical relations to one another. A science whose descriptive terms do not meet this condition will never produce any laws that reflect such nomological connections. (shrink)