It has often been suggested that people's ordinary understanding of morality involves a belief in objective moral truths and a rejection of moral relativism. The results of six studies call this claim into question. Participants did offer apparently objectivist moral intuitions when considering individuals from their own culture, but they offered increasingly relativist intuitions considering individuals from increasingly different cultures or ways of life. The authors hypothesize that people do not have a fixed commitment to moral objectivism but instead tend (...) to adopt different views depending on the degree to which they consider radically different perspectives on moral questions. (shrink)

It has often been suggested that people’s ordinary folk understanding of morality involves a rejection of moral relativism and a belief in objective moral truths. The results of six studies call this claim into question. Participants did offer apparently objectivist intuitions when confronted with questions about individuals from their own culture, but they offered increasingly relativist intuitions as they were confronted with questions about individuals from increasingly different cultures or ways of life. In light of these data, the authors hypothesize (...) that people do not have a fixed commitment to moral objectivism but instead tend to adopt different views depending on the degree to which they consider radically different perspectives on moral questions. [NOTE: This is a reprint of Sarkissian et al 2011]. (shrink)

Introduction A brief look at the competing present-day interpretations of Hume's philosophy will leave the uninitiated reader completely baffled. On the one hand , Hume is seen as a philosopher who attempted to analyse concepts with ...

Many metaethicists agree that as ordinary people experience morality as a realm of objective truths, we have a prima facie reason to believe that it actually is such a realm. Recently, worries have been raised about the validity of the extant psychological research on this argument’s empirical hypothesis. Our aim is to advance this research, taking these worries into account. First, we propose a new experimental design for measuring folk intuitions about moral objectivity that may serve as an inspiration for (...) future studies. Then we report and discuss the results of a survey that was based on this design. In our study, most of our participants denied the existence of objective truths about most or all moral issues. In particular, many of them had the intuition that whether moral sentences are true depends both on their own moral beliefs and on the dominant moral beliefs within their culture. This finding suggests that the realist presumptive argument may have to be rejected and that instead anti-realism may have a presumption in its favor. (shrink)

Moral abolitionists claim that morality ought to be abolished. According to one of their most prominent arguments, this is because making moral judgments renders people significantly less tolerant toward anyone who holds divergent views. In this paper we investigate the hypothesis that morality’s tolerance-decreasing effect only occurs if people are realists about moral issues, i.e., they interpret these issues as objectively grounded. We found support for this hypothesis (Studies 1 and 2). Yet, it also turned out that the intolerance associated (...) with realism is mediated by moral conviction and perceived consensus. People tend to feel more strongly about those moral issues they ground objectively and, in doing so, are more prone to display the vice of moral smugness toward those who disagree with them. The remedy for this that has been recommended is humility which we found (Study 3) is indeed related to reduced intolerance, in part by predicting a reduction in realism, but also in part through a direct connection to intolerance. These results put pressure on abolitionists’ “argument from intolerance.”. (shrink)

Skepticism about the epistemic value of intuition in theoretical and philosophical inquiry has recently been bolstered by empirical research suggesting that people’s concrete-case intuitions are vulnerable to irrational biases (e.g., the order effect). What is more, skeptics argue that we have no way to ‘‘calibrate” our intuitions against these biases and no way of anticipating intuitional instability. This paper challenges the skeptical position, introducing data from two studies that suggest not only that people’s concrete-case intuitions are often stable, but also (...) that people have introspective awareness of this stability, providing a promising means by which to assess the epistemic value of our intuitions. (shrink)

It has been claimed that the attempt to analyze know-how in terms of propositional knowledge over-intellectualizes the mind. Exploiting the methods of so-called “experimental philosophy”, we show that the charge of over-intellectualization is baseless. Contra neo-Ryleans, who analyze know-how in terms of ability, the concrete-case judgments of ordinary folk are most consistent with the view that there exists a set of correct necessary and sufficient conditions for know-how that does not invoke ability, but rather a certain sort of propositional knowledge. (...) To the extent that one’s considered judgments agree with those of the folk (or to the extent that one is unwilling to contravene widespread judgments), this constitutes a strong prima facie case against neo-Ryleanism. (shrink)

Lay persons may have intuitions about morality's objectivity. What do these intuitions look like? And what are their causes and consequences? In recent years, an increasing number of scholars have begun to investigate these questions empirically. This article presents and assesses the resulting area of research as well as its potential philosophical implications. First, we introduce the methods of empirical research on folk moral objectivism. Second, we provide an overview of the findings that have so far been made. Third, we (...) raise a number of methodological worries that cast doubt upon these findings. And fourth, we discuss ways in which lay persons' intuitions aboutmoral objectivity may bear on philosophical claims. (shrink)

Recent scholarship (Goodwin & Darley, 2008) on the meta-ethical debate between objectivism and relativism has found people to be mixed: they are objectivists about some issues, but relativists about others. The studies discussed here sought to explore this further. Study 1 explored whether giving people the ability to identify moral issues for themselves would reveal them to be more globally objectivist. Study 2 explored people's meta-ethical commitments more deeply, asking them to provide verbal explanations for their judgments. This revealed that (...) while people think they are relativists, this may not always be the case. The explanations people gave were sometimes rated by outside (blind) coders as being objective, even when given a relativist response. Nonetheless, people remained meta-ethical pluralists. Why this might be is discussed. (shrink)

This paper explores relationships between environment and education after the Covid-19 pandemic through the lens of philosophy of education in a new key developed by Michael Peters and the Philosophy of Education Society of Australasia. The paper is collectively written by 15 authors who responded to the question: Who remembers Greta Thunberg? Their answers are classified into four main themes and corresponding sections. The first section, ‘As we bake the earth, let's try and bake it from scratch’, gathers wider philosophical (...) considerations about the intersection between environment, education, and the pandemic. The second section, ‘Bump in the road or a catalyst for structural change?’, looks more closely into issues pertaining to education. The third section, ‘If you choose to fail us, we will never forgive you’, focuses to Greta Thunberg’s messages and their responses. The last section, ‘Towards a new normal’, explores future scenarios and develops recommendations for critical emancipatory action. The concluding part brings these insights together, showing that resulting synergy between the answers offers much more then the sum of articles’ parts. With its ethos of collectivity, interconnectedness, and solidarity, philosophy of education in a new key is a crucial tool for development of post-pandemic education. (shrink)

Introductory students regularly endorse naïve skepticism—unsupported or uncritical doubt about the existence and universality of truth—for a variety of reasons. Though some of the reasons for students’ skepticism can be traced back to the student—for example, a desire to avoid engaging with controversial material or a desire to avoid offense—naïve skepticism is also the result of how introductory courses are taught, deemphasizing truth to promote students’ abilities to develop basic disciplinary skills. While this strategy has a number of pedagogical benefits, (...) it prevents students in early stages of intellectual development from understanding truth as a threshold concept. Using philosophy as a case study, I argue that we can make progress against naïve skepticism by clearly discussing how metadisciplinary aims differ at the disciplinary and course levels in a way that is meaningful, reinforced, and accessible. (shrink)

Abstract: Recent experimental research on the 'Knobe effect' suggests, somewhat surprisingly, that there is a bi-directional relation between attributions of intentional action and evaluative considerations. We defend a novel account of this phenomenon that exploits two factors: (i) an intuitive asymmetry in judgments of responsibility (e.g. praise/blame) and (ii) the fact that intentionality commonly connects the evaluative status of actions to the responsibility of actors. We present the results of several new studies that provide empirical evidence in support of this (...) account while disconfirming various currently prominent alternative accounts. We end by discussing some implications of this account for folk psychology. (shrink)

The book is a defence of scientific realism. Its primary aim is to argue that it is possible to establish scientific realism without Inference to the Best Explanation. The idea that plays the central role in the book is an "Eddington-inference". Arthur Eddington once considered a hypothetical ichthyologist who concluded from the fact that his net contained no fish smaller than the holes in his net that there were in the sea no fish smaller than the holes in his net. (...) Although Eddington himself defended the inference, the author of the present volume argues on probabilistic grounds that it is likely such an inference is flawed. He generalises the argument to develop a probabilistic justification for scientific realist claims about the existence of unobservable entities. (shrink)

We distinguish between two different strategies in methodology of economics. The big picture strategy, dominant in the twentieth century, ascribed to economics a unified method and evaluated this m...

Ascriptions of objectivity carry significant weight. But they can also cause confusion because wildly different ideas of what it means to be objective are common. Faced with this, some philosophers have argued that objectivity should be eliminated. I will argue, against one such position, that objectivity can be useful even though it is plural. I will then propose a contextualist approach for dealing with objectivity as a way of rescuing what is useful about objectivity while acknowledging its plurality.

_ Source: _Page Count 32 In this paper we first set the stage with a brief overview of the tangled history of humility in theology and philosophy—beginning with its treatment in the Bible and ending with the more recent work that has been done in contemporary philosophy. Our two-fold goal at this early stage of the paper is to explore some of the different accounts of humility that have traditionally been developed and highlight some of the key debates in the (...) current literature. Next, we present the findings from several studies we recently conducted in an effort to explore people’s intuitions and beliefs about humility as well as their experiences with being humble. Finally, we discuss the relevance of our findings to the ongoing philosophical debates about humility—suggesting that while some varieties of humility are problematic, other varieties of humility are certainly worth wanting. (shrink)

The sceptical positions philosophers have adopted with respect to neuroimaging data are based on detailed evaluations of subtraction, which is one of many data analysis techniques used with neuroimaging data. These positions are undermined when the epistemic implications of the use of a diversity of data analysis techniques are taken into account. I argue that different data analysis techniques reveal different patterns in the data. Through the use of multiple data analysis techniques, researchers can produce results that are locally robust. (...) Thus, the epistemology of neuroimaging must take into consideration the details of the different data analysis techniques that are used to evaluate neuroimaging data, and the specific theoretical aims those techniques are deployed towards. _1_ Introduction _2_ Scepticism about Neuroimaging _3_ Data Analysis and Evidence _4_ Deconvolution and Pattern Classification Analysis _4.1_ Deconvolution analysis _4.2_ Region of interest selection _4.3_ Pattern classification analysis _5_ The Strength of Multiple Analyses _6_ Conclusion. (shrink)

Compatibilist libertarianism claims that alternate possibilities for action at the agential level are consistent with determinism at the physical level. Unlike traditional compatibilism about alternate possibilities, involving conditional or dispositional accounts of the ability to act, compatibilist libertarianism offers us unqualified modalities at the agential level, consistent with physical determinism, a potentially big advance. However, I argue that the account runs up against two problems. Firstly, the way in which the agential modalities are generated talks past the worries of the (...) incompatibilist in the traditional free will problem. As such, it fails to dispel the worries that determinism generates for the incompatibilist. Secondly, in spite of the ingenious use of the supervenience thesis and multiple realizability, the position still allows us to generate the old worry that determinism at the physical level would mean no alternate possibilities at the level of agency. In particular, I develop a new example, the ‘atomic slit case’ that demonstrates how physical level information is salient to what is possible at the agential level, motivating incompatibilism. (shrink)

‘Fake news’ has become an increasingly common refrain in public discourse, though the term itself has several uses, at least one of which constitutes Frankfurtian bullshit. After examining what sorts of fake news appeals do and do not count as bullshit, I discuss strategies for overcoming our openness to such bullshit. I do so by drawing a parallel between openness to bullshit and naïve skepticism—one’s willingness to reject the concept of truth on unsupported or ill-considered grounds—and suggest that this parallel (...) indicates three principles for how we ought to combat our openness to fake news and other bullshit. First, the root causes of bullshit openness are not monolithic; we should adopt anti-bullshit strategies in recognition of this fact. Second, our efforts to overcome bullshit openness should be collaborative efforts to create an environment that allows for sustained interrogation of our bullshit openness, rather than a confrontational provision of contrary evidence, despite the fact that such strategies are more time-intensive. Third, social media is unlikely to be a fertile ground on which we will make meaningful progress in the fight against bullshit because of the inherent nature of social media platforms as spaces for short, declarative, confrontational claims. (shrink)

A philosopher once wrote the following words:If I examine the PTOLOMAIC and COPERNICAN systems, I endeavour only, by my enquiries, to know the real situation of the planets; that is, in other words, I endeavour to give them, in my conception, the same relations, that they bear towards each other in the heavens. To this operation of the mind, therefore, there seems to be always a real, though often an unknown standard, in the nature of things; nor is truth or (...) falsehood variable by the various apprehensions of mankind. Though all human race should for ever conclude, that the sun moves, and the earth remains at rest, the sun stirs not an inch from his place for all these reasonings; and such conclusions are eternally false and erroneous. (shrink)

The new field of experimental philosophy has emerged as the methods of psychological science have been brought to bear on traditional philosophical issues. Oxford Studies in Experimental Philosophy will be the place to go to see outstanding new work in the field. It will feature papers by philosophers, papers by psychologists, and papers co-authored by people in both disciplines. The series heralds the emergence of a truly interdisciplinary field in which people from different disciplines are working together to address a (...) shared set of questions. The inaugural volume is roughly structured into four sections. The first three papers focus on recent developments in moral psychology, a topic that has seen lively debate and a great deal of progress over the last decade. The second section highlights three contributions that bring new methods to moral psychology: formal modeling and special populations. The third section brings together four papers that adopt an experimental philosophy approach to novel topics, including intuitive dualism, generics, joint action, and happiness. And the last two papers provide critical and historical context to the development of experimental philosophy. (shrink)

Skepticism about the epistemic value of intuition in theoretical and philosophical inquiry fueled by the empirical discovery of irrational bias (e.g., the order effect) in people's judgments has recently been challenged by research suggesting that people can introspectively track intuitional instability. The two studies reported here build upon this, the first by demonstrating that people are able to introspectively track instability that was experimentally induced by introducing conflicting expert opinion about certain cases, and the second by demonstrating that it was (...) the presence of instability?not merely the presence of conflicting information?that resulted in changes in the relevant attitudinal states (i.e., confidence and belief strength). The paper closes with the suggestion that perhaps the best explanation for these (and other) findings may be that intuitional instability is not actually ?intuitional.? (shrink)

According to non-cognitivism, moral sentences and judgements do not aim to represent how things morally are. This paper presents an empirical argument against this view. We begin by showing that non-cognitivism entails the prediction that after some reflection competent ordinary speakers’ semantic intuitions favor that moral sentences and judgements do not aim to represent how things morally are. At first sight, this prediction may seem to have been confirmed by previous research on folk metaethics. However, a number of methodological worries (...) lead us to doubt this interpretation. We, therefore, conducted a psychological study that alleviates these worries as far as possible. It turned out that competent ordinary speakers’ reflective semantic intuitions dominantly fail to favor that moral sentences do not aim to represent how things morally are. This challenge to non-cognitivism is defended and supplemented by considering deflationary theories of moral truth and middle ground theories in the cognitivism/non-cognitivism debate. (shrink)

Our primary aim in this paper is to sketch the account of virtue that we think most amenable to virtue measurement. Our account integrates Whole Trait Theory from psychology with a broadly neo-Aristotelian approach to virtue. Our account is ‘ecumenical’ in that it has appeal for a wide range of virtue ethicists. According to WTT, a personality trait is composed of a set of situation-specific trait-appropriate responses, which are produced when certain “social-cognitive” mechanisms are triggered by the perception of trait-relevant (...) stimuli in a person’s external and/or internal environment. Moving from this starting point, we discuss our conception of a virtue and respects in which it both aligns with and diverges from Aristotle’s conception. We discuss roles for practical wisdom and motivation in our conception of virtue, and highlight respects in which WTT provides an amenable empirical framework into which key Aristotelian elements can be integrated. We conclude with brief remarks about our conception as an empirically adequate and measurable account. (shrink)

David Hume's A Treatise of Human Nature presents the most important account of skepticism in the history of modern philosophy. In this lucid and thorough introduction to the work, John P. Wright examines the development of Hume's ideas in the Treatise, their relation to eighteenth-century theories of the imagination and passions, and the reception they received when Hume published the Treatise. He explains Hume's arguments concerning the inability of reason to establish the basic beliefs which underlie science and morals, as (...) well as his arguments showing why we are nevertheless psychologically compelled to accept such beliefs. The book will be a valuable guide for those seeking to understand the nature of modern skepticism and its connection with the founding of the human sciences during the Enlightenment. (shrink)

Philosophical arguments often assume that the folk tends towards moral objectivism. Although recent psychological studies have indicated that lay persons’ attitudes to morality are best characterized in terms of non-objectivism-leaning pluralism, it has been maintained that the folk may be committed to moral objectivism implicitly. Since the studies conducted so far almost exclusively assessed subjects’ metaethical attitudes via explicit cognitions, the strength of this rebuttal remains unclear. The current study attempts to test the folk’s implicit metaethical commitments. We present results (...) of a newly developed Implicit Association Test for metaethical attitudes which indicate that the folk generally tend towards moral non-objectivism on the implicit level as well. We discuss implications of this finding for the philosophical debate. (shrink)

Our primary aim in this paper is to sketch the account of virtue that we think most amenable to virtue measurement. Our account integrates Whole Trait Theory from psychology with a broadly neo-Aristotelian approach to virtue. Our account is ‘ecumenical’ in that it has appeal for a wide range of virtue ethicists. According to WTT, a personality trait is composed of a set of situation-specific trait-appropriate responses, which are produced when certain “social-cognitive” mechanisms are triggered by the perception of trait-relevant (...) stimuli in a person’s external and/or internal environment. Moving from this starting point, we discuss our conception of a virtue and respects in which it both aligns with and diverges from Aristotle’s conception. We discuss roles for practical wisdom and motivation in our conception of virtue, and highlight respects in which WTT provides an amenable empirical framework into which key Aristotelian elements can be integrated. We conclude with brief remarks about our conception as an empirically adequate and measurable account. (shrink)

Our primary aim in this paper is to sketch the account of virtue that we think most amenable to virtue measurement. Our account integrates Whole Trait Theory from psychology with a broadly neo-Aristotelian approach to virtue. Our account is ‘ecumenical’ in that it has appeal for a wide range of virtue ethicists. According to WTT, a personality trait is composed of a set of situation-specific trait-appropriate responses, which are produced when certain “social-cognitive” mechanisms are triggered by the perception of trait-relevant (...) stimuli in a person’s external and/or internal environment. Moving from this starting point, we discuss our conception of a virtue and respects in which it both aligns with and diverges from Aristotle’s conception. We discuss roles for practical wisdom and motivation in our conception of virtue, and highlight respects in which WTT provides an amenable empirical framework into which key Aristotelian elements can be integrated. We conclude with brief remarks about our conception as an empirically adequate and measurable account. (shrink)

Our primary aim in this paper is to sketch the account of virtue that we think most amenable to virtue measurement. Our account integrates Whole Trait Theory from psychology with a broadly neo-Aristotelian approach to virtue. Our account is ‘ecumenical’ in that it has appeal for a wide range of virtue ethicists. According to WTT, a personality trait is composed of a set of situation-specific trait-appropriate responses, which are produced when certain “social-cognitive” mechanisms are triggered by the perception of trait-relevant (...) stimuli in a person’s external and/or internal environment. Moving from this starting point, we discuss our conception of a virtue and respects in which it both aligns with and diverges from Aristotle’s conception. We discuss roles for practical wisdom and motivation in our conception of virtue, and highlight respects in which WTT provides an amenable empirical framework into which key Aristotelian elements can be integrated. We conclude with brief remarks about our conception as an empirically adequate and measurable account. (shrink)

Re-consent in research, the asking for a new consent if there is a change in protocol or to confirm the expectations of participants in case of change, is an under-explored issue. There is little clarity as to what changes should trigger re-consent and what impact a re-consent exercise has on participants and the research project. This article examines applicable policy statements and literature for the prevailing arguments for and against re-consent in relation to longitudinal cohort studies, tissue banks and biobanks. (...) Examples of re-consent exercises are presented, triggers and non-triggers for re-consent discussed and the conflicting attitudes of commentators, participants and researchers highlighted. We acknowledge current practice and argue for a greater emphasis on ‘responsive autonomy,’ that goes beyond a one-time consent and encourages greater communication between the parties involved. A balance is needed between respecting participants' wishes on how they want their data and samples used and enabling effective research to proceed. (shrink)

Advances in Experimental Moral Psychology brings together leading scholars in the field to provide fresh theoretical perspectives on research in philosophy and psychology. Reflecting a diverse and active field of study, contributors are drawn from across both subjects to pursue central questions concerning moral psychology. Covering a wide-ranging selection of arguments, issues and debates, topics includes the role of emotion in moral judgment (both at a general theoretical level and with regards to specific topics); the moral psychology behind political orientation; (...) the nature and content of moral character and more higher-order questions concerning the status of morality itself. For philosophers and researchers in the social and behavioral science, this exciting new volume reveals the beneficial results of integrating these two disciplines and illustrates the promise of this experimental approach to moral psychology. (shrink)

One problem that has formed the focus of much recent discussion on personal identity is the Fission Problem. The aim of this paper is to offer a novel solution to this problem.

In this paper I show how what came to be known as “the double law of habit,” first formulated by Joseph Butler in a discussion of moral psychology in 1736, was taken up and developed by medical physiologists William Porterfield, Robert Whytt, and William Cullen as they disputed fundamental questions regarding the influence of the mind on the body, the possibility of unconscious mental processes, and the nature and extent of voluntary action. The paper shows, on a particular topic, the (...) overlap between eighteenth-century philosophical writings on the science of human nature on the one hand,and medical writings and lectures in physiology on the other. Other early modern writers discussed in the paper include René Descartes, Herman Boerhaave and David Hume. (shrink)

As John Rawls makes clear in A Theory of Justice, there is a popular and influential strand of political thought for which brute luck – that is, being lucky in the so-called “lottery of life” – ought to have no place in a theory of distributive justice. Yet the debate about luck, desert, and fairness in contemporary political philosophy has recently been rekindled by a handful of philosophers who claim that desert should play a bigger role in theories of distributive (...) justice. In the present paper, we present the results of our attempts to fill in some of the missing empirical details of this debate. Our findings provide some preliminary evidence that, contrary to what most contemporary political philosophers have assumed, people are not as worried by natural luck as previously thought. Instead, people’s worries seem to be focused exclusively on inequalities generated by social luck. (shrink)

Psyche and Soma is a multi-disciplinary exploration of the history of understanding of the human mind or soul and its relationship to the body, through the course of more than two thousand years. Thirteen specially commissioned chapters, each written by a recognized expert, discuss such figures as the doctors Hippocrates and Galen, the theologians St Paul, Augustine, and Aquinas, and philosophers from Plato to Leibniz.

A restricted-use mobile device policy for introductory philosophy classrooms is presented and defended. The policy allows students to use devices only during open periods announced by the professor and is based on recent empirical findings on the effects of in-class mobile device use. These results suggest devices are generally detrimental to student learning, though they have targeted benefits for specific tasks. The policy is defended via a discussion of the ethical considerations surrounding device use, a discussion of the policy’s benefits, (...) and responses to potential objections. Avenues for future research are suggested at the conclusion of the discussion. (shrink)

This paper considers the role of physicaleducation researchers within current publicconcerns about body shape and weight. UsingUlrich Beck's notion of `risk' it examines howcertainty about children, obesity, exercise andhealth is produced in the contexts of `expert'knowledge and recontextualised in the academicand professional physical education literature.It is argued that the unquestioning acceptanceof the obesity discourses in physical educationhelps to construct anxieties about the body,which are detrimental to students and silencesalternative ways of thinking and doing physicaleducation.

The publication of a new intellectual biography of George Cheyne provides a "propitious" occasion for "a thoroughly skeptical review" of the question which has long exercised Hume scholars, whether Cheyne was the intended recipient of David Hume's fascinating pre-Treatise Letter to a Physician, the letter which describes his own hypochondriacal physical and mental symptoms and gives an account of his early philosophical development. Hume's nineteenth-century biographer, John Hill Burton, argued that Hume was probably writing to Cheyne, while Ernest Mossner claimed (...) to definitively refute that hypothesis in an article entitled "Hume's Epistle to Dr. Arbuthnot," published in 1944. Anita Guerrini's intellectual biography does not discuss Cheyne as a possible recipient of Hume's letter, but she does present a well-rounded picture of this interesting eighteenth-century physician from which we can judge his appropriateness as its addressee. In the following discussion I will make use of the biographical material found in this new biography of Cheyne, as well as other sources, to show that Mossner's arguments are less than definitive, and that it would be wrong to dismiss the possibility that the letter was sent to George Cheyne. This is a possibility that, for reasons that I will make clear, makes good biographical and philosophical sense. At the same time, it is important to keep a proper suspense of judgment as Burton did, for the evidence that the letter was either intended for or actually sent to Cheyne is not definitive. (shrink)

There is some complementarity of models for the origin of the electroencephalogram and neural network models for information storage in brainlike systems. From the EEG models of Freeman, of Nunez, and of the authors' group we argue that the wavelike processes revealed in the EEG exhibit linear and near-equilibrium dynamics at macroscopic scale, despite extremely nonlinear – probably chaotic – dynamics at microscopic scale. Simulations of cortical neuronal interactions at global and microscopic scales are then presented. The simulations depend on (...) anatomical and physiological estimates of synaptic densities, coupling symmetries, synaptic gain, dendritic time constants, and axonal delays. It is shown that the frequency content, wave velocities, frequency/wavenumber spectra and response to cortical activation of the electrocorticogram can be reproduced by a “lumped” simulation treating small cortical areas as single-function units. The corresponding cellular neural network simulation has properties that include those of attractor neural networks proposed by Amit and by Parisi. Within the simulations at both scales, sharp transitions occur between low and high cell firing rates. These transitions may form a basis for neural interactions across scale. To maintain overall cortical dynamics in the normal low firing-rate range, interactions between the cortex and the subcortical systems are required to prevent runaway global excitation. Thus, the interaction of cortex and subcortex via corticostriatal and related pathways may partly regulate global dynamics by a principle analogous to adiabatic control of artificial neural networks. (shrink)

A laboratory-testable, solid-state Maxwell demon is proposed that utilizes the electric field energy of an open-gap p-n junction. Numerical results from a commercial semiconductor device simulator verify primary results from a 1-D analytic model. Present day fabrication techniques appear adequate for laboratory tests of principle.