Here we elucidate a paradox: how a single chemoattractant‐receptor system in two individuals is used for communication despite the seeming inevitability of self‐excitation. In the filamentous fungus Neurospora crassa, genetically identical cells that produce the same chemoattractant fuse via the homing of individual cell protrusions toward each other. This is achieved via a recently described “ping‐pong” pulsatile communication. Using a generic activator‐inhibitor model of excitable behavior, we demonstrate that the pulse exchange can be fully understood in terms of two excitable (...) systems locked into a stable oscillatory pattern of mutual excitation. The most puzzling properties of this communication are the sudden onset of oscillations with final amplitude, and the absence of seemingly inevitable self‐excitation. We show that these properties result directly from both the excitability threshold and refractory period characteristic of excitable systems. Our model suggests possible molecular mechanisms for the ping‐pong communication. (shrink)

In vertebrates it is often found that if one considers a group of genes clustered on a certain chromosome, then the homologues of those genes often form another cluster on a different chromosome. There are four explanations, not necessarily mutually exclusive, to explain how such homologous clusters appeared. Homologous clusters are expected at a low probability even if genes are distributed at random. The duplication of a subset of the genome might create homologous clusters, as would a duplication of the (...) entire genome. Alternatively, it may be adaptive for certain combinations of genes to cluster, although clearly the genes must have duplicated prior to rearrangement into clusters. Molecular phylogenetics provides a means to examine the origins of homologous clusters, although it is difficult to discriminate between the different explanations using current data. However, with more extensive sequencing and mapping of vertebrate genomes, especially those of the early diverging chordates, it should soon become possible to resolve the origins of homologous clusters. BioEssays 21:697–703, 1999. © 1999 John Wiley & Sons, Inc. (shrink)

Probabilistic methods are providing new explanatory approaches to fundamental cognitive science questions of how humans structure, process and acquire language. This review examines probabilistic models defined over traditional symbolic structures. Language comprehension and production involve probabilistic inference in such models; and acquisition involves choosing the best model, given innate constraints and linguistic and other input. Probabilistic models can account for the learning and processing of language, while maintaining the sophistication of symbolic models. A recent burgeoning of theoretical developments and online (...) corpus creation has enabled large models to be tested, revealing probabilistic constraints in processing, undermining acquisition arguments based on a perceived poverty of the stimulus, and suggesting fruitful links with probabilistic theories of categorization and ambiguity resolution in perception. (shrink)

We present a theory of decision by sampling (DbS) in which, in contrast with traditional models, there are no underlying psychoeconomic scales. Instead, we assume that an attribute’s subjective value is constructed from a series of binary, ordinal comparisons to a sample of attribute values drawn from memory and is its rank within the sample. We assume that the sample reflects both the immediate distribution of attribute values from the current decision’s context and also the background, real-world distribution of attribute (...) values. DbS accounts for concave utility functions; losses looming larger than gains; hyperbolic temporal discounting; and the overestimation of small probabilities and the underestimation of large probabilities. Ó 2005 Elsevier Inc. All rights reserved. (shrink)

The arts of rule cover the exercise of power by princes and popular sovereigns, but they range beyond the domain of government itself, extending to civil associations, political parties, and religious institutions. Making full use of political philosophy from a range of backgrounds, this festschrift for Harvey Mansfield recognizes that although the arts of rule are comprehensive, the best government is a limited one.

It has long been thought that observing distinctive traces of quantum gravity in a laboratory setting is effectively impossible, since gravity is so much weaker than all the other familiar forces in particle physics. But the quantum gravity phenomenology community today seeks to do the (effectively) impossible, using a challenging novel class of `tabletop' Gravitationally Induced Entanglement (GIE) experiments, surveyed here. The hypothesized outcomes of the GIE experiments are claimed by some (but disputed by others) to provide a `witness' of (...) the underlying quantum nature of gravity in the non-relativistic limit, using superpositions of Planck-mass bodies. We inspect what sort of achievement it would possibly be to perform GIE experiments, as proposed, ultimately arguing that the positive claim of witness is equivocal. Despite various sweeping arguments to the contrary in the vicinity of quantum information theory or given low-energy quantum gravity, whether or not one can claim to witness the quantum nature of the gravitational field in these experiments decisively depends on which out of two legitimate modelling paradigms one finds oneself in. However, by situating GIE experiments in a tradition of existing experiments aimed at making gravity interestingly quantum in the laboratory, we argue that, independently of witnessing or paradigms, there are powerful reasons to perform the experiments, and that their successful undertaking would indeed be a major advance in physics. (shrink)

The remarkable successes of the physical sciences have been built on highly general quantitative laws, which serve as the basis for understanding an enormous variety of specific physical systems. How far is it possible to construct universal principles in the cognitive sciences, in terms of which specific aspects of perception, memory, or decision making might be modelled? Following Shepard (e.g.,1987), it is argued that some universal principles may be attainable in cognitive science. Here, 2 examples are proposed: the simplicity principle (...) (which states that the cognitive system prefers patterns that provide simpler explanations of available data); and the scale‐invariance principle, which states that many cognitive phenomena are independent of the scale of relevant underlying physical variables, such as time, space, luminance, or sound pressure. This article illustrates how principles may be combined to explain specific cognitive processes by using these principles to derive SIMPLE, a formal model of memory for serial order (Brown, Neath, & Chater, 2007), and briefly mentions some extensions to models of identification and categorization. This article also considers the scope and limitations of universal laws in cognitive science. (shrink)

The frequency of the use of deception in American psychological research was studied by reviewing articles from journals in personality and social psychology from 1921 to 1994. Deception was used rarely during the developmental years of social psychology into the 1930s, then grew gradually and irregularly until the 1950s. Between the 1950s and 1970s the use of deception increased significantly. This increase is attributed to changes in experimental methods, the popularity of realistic impact experiments, and the influence of cognitive dissonance (...) theory. Since 1980 there appears to have been a decrease in the use of deception as compared to previous decades which is related to changes in theory, methods, ethical standards, and federal regulation of research. (shrink)

Abductive reasoning is central to reconstructing the past in the geosciences. This paper outlines the nature of the abductive method and restates it in Bayesian terms. Evidence plays a key role in this working method and, in particular, traces of the past are important in this explanatory framework. Traces, whether singularly or as groups, are interpreted within the context of the event for which they have evidential claims. Traces are not considered as independent entities but rather as inter-related pieces of (...) information concerning the likelihood of specific events. Exemplification of the use of such traces is provided by dissecting an example of their use in the environmental reconstruction of mountain climate. (shrink)

This paper proposes a novel account of why intertemporal decisions tend to display impatience: People pay more attention to the opportunity costs of choosing larger, later rewards than to the opportunity costs of choosing smaller, sooner ones. Eight studies show that when the opportunity costs of choosing smaller, sooner rewards are subtly highlighted, people become more patient, whereas highlighting the opportunity costs of choosing larger, later rewards has no effect. This pattern is robust to variations in the choice task, to (...) the participant population, and is observed for both incentivized and hypothetical choices. We argue that people are naturally aware of the opportunity costs associated with delayed rewards, but pay less attention to those associated with taking smaller, sooner ones. We conclude by discussing implications for theory and policy. (shrink)

This project is an attempt to frame and develop the questions: What is the relation between the economy, what Marx called the mode of production, and transformations of subjectivity and social relations? How is it possible to think these relations without reducing one to the other, or effacing one for the sake of the other? In short, how can we think the materiality of subjectivity? Several different discourses and lines of research provoke these questions. First, recent and not so recent (...) work within continental philosophy in relation to the "critique of the subject," argues for an investigation of the practices of knowledge, power, and desire productive of historically determinate forms of subjectivity. The second line of research includes a history of heterogeneous Marxist thinkers all of whom attempt to locate in Marx's texts a series of questions, largely unresolved, regarding the relations between production and power, politics and the economy, culture and materiality. To identify these two discourses as provocations, however, is not to suggest that what is at stake in this project is the simple adjudication, or settling of accounts, between Marxism and post-structuralism---a question which would only be of interest to a handful of academics. Rather the investigation into these two lines of research has as its framework a larger and somewhat inchoate series of questions regarding the contemporary socio-historical condition. These questions all begin from the intuition that contemporary society, what is called "post-industrial," "postmodern," or "information society," entails a fundamental transformation of the relations, or an accelerated breakdown of the divisions, between the spheres of the economy, culture, politics, and subjectivity. I argue that these questions, and the current juncture which they attempt to grasp, can be clarified through an articulation of the complex relation between the mode of production and the production of subjectivity; such an articulation takes the form of a genealogy of various critical junctures in the writing of Marx, the debates within western Marxism and critical theory, and contemporary continental philosophy. (shrink)

Recent business headlines, particularly those related to the collapsed energy-trading giant, Enron and its auditor, Arthur Andersen raise concerns about accountants' ethical reasoning. We propose, and provide evidence from 90 new auditors from Big-Five accounting firms, that a selection-socialization effect exists in the accounting profession that results in hiring accountants with disproportionately higher levels of the Sensing/thinking (ST) cognitive style. This finding is important and relevant because we also find that the ST cognitive style is associated with relatively low levels (...) of ethical reasoning, regardless of gender. This finding implies a need for emphasis on the ethical training of accountants. The results also suggest that accounting firms should consider recruiting accountants with cognitive styles associated with relatively higher levels of ethical reasoning. (shrink)

An abridged reading guide for Friedrich Schiller’s Letters on the Aesthetic Education of Man, based on Matherne and Riggle's two-part paper, "Schiller on Freedom and Aesthetic Value". -/- Part I: British Journal of Aesthetics 60 (4): 375-402. 2020 Part II: British Journal of Aesthetics 61 (1): 17-40. 2021.

The human brain has some capabilities that the brains of other animals lack. It is to these distinctive capabilities that our species owes its dominant position. Other animals have stronger muscles or sharper claws, but we have cleverer brains. If machine brains one day come to surpass human brains in general intelligence, then this new superintelligence could become very powerful. As the fate of the gorillas now depends more on us humans than on the gorillas themselves, so the fate of (...) our species then would come to depend on the actions of the machine superintelligence. But we have one advantage: we get to make the first move. Will it be possible to construct a seed AI or otherwise to engineer initial conditions so as to make an intelligence explosion survivable? How could one achieve a controlled detonation? To get closer to an answer to this question, we must make our way through a fascinating landscape of topics and considerations. Read the book and learn about oracles, genies, singletons; about boxing methods, tripwires, and mind crime; about humanity's cosmic endowment and differential technological development; indirect normativity, instrumental convergence, whole brain emulation and technology couplings; Malthusian economics and dystopian evolution; artificial intelligence, and biological cognitive enhancement, and collective intelligence. (shrink)

A theory of aesthetic value should explain what makes aesthetic value good. Current views about what makes aesthetic value good privilege the individual’s encounter with aesthetic value—listening to music, reading a novel, writing a poem, or viewing a painting. What makes aesthetic value good is its benefit to the individual appreciator. But engagement with aesthetic value is often a social, participatory matter: sharing and discussing aesthetic goods, imitating aesthetic agents, dancing, cooking, dining, or making music together. This article argues that (...) we should understand aesthetic value in a way that centers these social forms of aesthetic engagement. To this end, the article argues that there is a social practice of aesthetic valuing, characterized as a participatory practice governed by the value of aesthetic community, which engages us in the social development of our capacities for discretionary valuing and volitional openness. Current theories of aesthetic value have trouble capturing the character of the practice of aesthetic valuing, and this motivates a novel communitarian theory of aesthetic value: aesthetic value is what is worthy of engagement in the social practice of aesthetic valuing. (shrink)

This book explores both the embodied nature of social life and the social nature of human bodily life. It provides an accessible review of the contemporary social science debates on the body, and develops a coherent new perspective. Nick Crossley critically reviews the literature on mind and body, and also on the body and society. He draws on theoretical insights from the work of Gilbert Ryle, Maurice Merleau-Ponty, George Herbert Mead and Pierre Bourdieu, and shows how the work of (...) these writers overlaps in interesting and important ways which, when combined, provide the basis for a persuasive and robust account of human embodiment. The Social Body provides a timely review of the theoretical approaches to the sociology of the body. It offers new insights, and a coherent new perspective on the body. It will be valuable reading for students and academics in sociology, philosophy, anthropology, psychology, and cultural studies. (shrink)

Today, complaints about information overload – associated with an overwhelming deluge of data – are commonplace. Early modernists have reacted to these concerns by showing that similar ones have arisen before. While this perspective is useful, it leaves out what was novel about the concept of information overload, which relied on a historically specific model of the human being. I trace the term’s history back to 1960, when the American psychologist and systems theorist James Grier Miller published his article on (...) ‘information input overload and psychopathology’. In Grier Miller’s usage, the idea of information overload signalled as much a reconceptualization of human beings as communication channels whose capacity could be overwhelmed as it did concerns about the volume of reading material to manage. Through his work, and the broader subsequent adoption of the term in academic and journalistic venues, I show how ‘information overload’ reflected intellectual and social trends specific to its time. (shrink)

Previous research has demonstrated that hormones, relationship goals, and social context influence interest in the opposite sex. It has not been previously reported, however, whether having a current sexual partner also influences interest in members of the opposite sex. To test this, we obtained explicit and implicit measures of interest by measuring men’s and women’s subjective ratings and response times while they evaluated photos of opposite-sex faces. Fifty-nine men and 56 women rated 510 photos of opposite-sex faces for realism, masculinity, (...) attractiveness, or affect. We found that these subjective ratings were not influenced by partner status in either men or women. However, women who did not report having a current sexual partner spent more time evaluating the photos than women who did have partners, demonstrating greater interest in the photos. Sexual partner status did not predict men’s response times. These findings may reveal that relationship commitment in women suppresses interest in alternative partners. (shrink)

1 Evidence-based policy requires researchers to provide the answers to ecological questions that are of interest to policy makers. To find out what those questions are in the UK, representatives from 28 organizations involved in policy, together with scientists from 10 academic institutions, were asked to generate a list of questions from their organizations. 2 During a 2-day workshop the initial list of 1003 questions generated from consulting at least 654 policy makers and academics was used as a basis for (...) generating a short list of 100 questions of significant policy relevance. Short-listing was decided on the basis of the preferences of the representatives from the policy-led organizations. 3 The areas covered included most major issues of environmental concern in the UK, including agriculture, marine fisheries, climate change, ecosystem function and land management. 4 The most striking outcome was the preference for general questions rather than narrow ones. The reason is that policy is driven by broad issues rather than specific ones. In contrast, scientists are frequently best equipped to answer specific questions. This means that it may be necessary to extract the underpinning specific question before researchers can proceed. 5 Synthesis and applications. Greater communication between policy makers and scientists is required in order to ensure that applied ecologists are dealing with issues in a way that can feed into policy. It is particularly important that applied ecologists emphasize the generic value of their work wherever possible. (shrink)

_Life Examined_ is an anthology of carefully edited readings designed to serve as an introduction to many of the fundamental concepts of ethical and socio-political thought. It includes primary sources from a variety of traditions, with selections that range chronologically from ancient times through to the present day. These readings have been thoughtfully selected, edited, and contextualized to provide students with opportunities to sharpen their capacities for critical and theoretical reflection. The book begins with three key texts that frame the (...) historical discourse. Subsequent chapters are organized around ethical themes and theoretical questions that have animated debates throughout the ages, including the nature of practical rationality, scientific reasoning, wisdom, the law, equality, power, violence, and identity. (shrink)

Justifying involuntary psychiatric treatment on the basis of a judgment that a person lacks capacity is usually expressed in terms of a person’s ability to make a decision about his or her health and treatment. Typically, this relates to the ability to refuse treatment. Exactly what “capacity” means, however, and how one determines when another individual lacks capacity, or lacks sufficient capacity, in this context is particularly controversial, with the United Nations Committee on the Rights of Persons with Disabilities insisting (...) that involuntary treatment be abandoned altogether and capacity tests avoided.Capacity is a concept that has multiple meanings and applications across different disciplines and... (shrink)

This article puts Bernhard Waldenfels’ phenomenology of the alien in conversation with Michel Foucault’s hermeneutics of the self through a synthetic reading of Christian confessional scenes. The confessional scenes through which Foucault develops a hermeneutics of the confessing self can be read via Waldenfels as failures in responsiveness on the part of the spiritual master/elders. This allows the confessional scenes to be approached as intersubjective encounters, which broadens the angle of analysis beyond Foucault’s focus on confession as self-interpretive event. (...) At the same time, these encounters provided a rich, textured basis on which to consider what it looks like when Waldenfels’ phenomenological structure of call and response breaks down. The upshot of this analysis is that, on the one hand, it retains Foucault’s central contribution in providing tools to analyze the prospects for the self in light of the ethical failures of dominance. On the other hand, it shows that the whole confessional setting in which Foucault develops his hermeneutical understanding of the self is circumscribed by its failure to produce a fundamental ethical gesture, such that other selves, or versions of the self, might be possible when that gesture is in place. (shrink)

It is intuitively plausible that art and imagination are intimately connected. This chapter explores attempts to explain that connection. We focus on three areas in which art and imagination might be linked: production, ontology, and appreciation. We examine views which treat imagination as a fundamental human faculty, and aim for comprehensive accounts of art and artistic practice: for example, those of Kant and Collingwood. We also discuss philosophers who argue that a specific kind of imagining may explain some particular element (...) of the artistic domain: for example, Walton's ideas about representational art, and Kivy’s about reading. (shrink)

Social interaction is both ubiquitous and central to understanding human behavior. Such interactions depend, we argue, on shared intentionality: the parties must form a common understanding of an ambiguous interaction (e.g., one person giving a present to another requires that both parties appreciate that a voluntary transfer of ownership is intended). Yet how can shared intentionality arise? Many well-known accounts of social cognition, including those involving “mind-reading,” typically fall into circularity and/or regress. For example, A’s beliefs and behavior may depend (...) on her prediction of B’s beliefs and behavior, but B’s beliefs and behavior depend in turn on her prediction of A’s beliefs and behavior. One possibility is to embrace circularity and take shared intentionality as imposing consistency conditions on beliefs and behavior, but typically there are many possible solutions and no clear criteria for choosing between them. We argue that addressing these challenges requires some form of we-reasoning, but that this raises the puzzle of how the collective agent (the “we”) arises from the individual agents. This puzzle can be solved by proposing that the will of the collective agent arises from a simulated process of bargaining: agents must infer what they would agree, were they able to communicate. This model explains how, and which, shared intentions are formed. We also propose that such “virtual bargaining” may be fundamental to understanding social interactions. (shrink)

Social interaction is both ubiquitous and central to understanding human behavior. Such interactions depend, we argue, on shared intentionality: the parties must form a common understanding of an ambiguous interaction. Yet how can shared intentionality arise? Many well-known accounts of social cognition, including those involving “mind-reading,” typically fall into circularity and/or regress. For example, A’s beliefs and behavior may depend on her prediction of B’s beliefs and behavior, but B’s beliefs and behavior depend in turn on her prediction of A’s (...) beliefs and behavior. One possibility is to embrace circularity and take shared intentionality as imposing consistency conditions on beliefs and behavior, but typically there are many possible solutions and no clear criteria for choosing between them. We argue that addressing these challenges requires some form of we-reasoning, but that this raises the puzzle of how the collective agent arises from the individual agents. This puzzle can be solved by proposing that the will of the collective agent arises from a simulated process of bargaining: agents must infer what they would agree, were they able to communicate. This model explains how, and which, shared intentions are formed. We also propose that such “virtual bargaining” may be fundamental to understanding social interactions. (shrink)