Understanding cooperation and punishment in small-scale societies is crucial for explaining the origins of human cooperation. We studied warfare among the Turkana, a politically uncentralized, egalitarian, nomadic pastoral society in East Africa. Based on a representative sample of 88 recent raids, we show that the Turkana sustain costly cooperation in combat at a remarkably large scale, at least in part, through punishment of free-riders. Raiding parties comprised several hundred warriors and participants are not kin or day-to-day interactants. Warriors incur substantial (...) risk of death and produce collective benefits. Cowardice and desertions occur. (shrink)

Here, we revise Pietraszewski's model of groups by assigning participant pairs with two triplets, denoting: the type of game that models the interaction, its critical switching point between alternatives, and the perception of strategic similarity with the opponent. These triplets provide a set of primitives that accounts for individuals' strategic motivations and observed behaviors.

Research over the past half century has produced extensive evidence that observers cannot report or retain all of the details of their visual world from one moment to the next. During the past decade, a new set of studies has illustrated just how pervasive these limits are. For example, early evidence for the failure to detect changes to simple dot patterns (Phillips, 1974) and arrays of letters (Pashler, 1988) generalizes to more naturalistic displays such as photographs and motion pictures (e.g., (...) Levin & Simons, 1997; Rensink, O’Regan, & Clark, 1997; see Rensink, 2002 for a recent review). This failure to report changes (change blindness) can be induced in both simple and naturalistic displays, whenever the change co-occurs with a visual disruption such as an eye movement (Currie, McConkie, Carlson-Radvansky, & Irwin, 1995; Hollingworth, Schrock, & Henderson, 2001), image shift (Blackmore, Brelstaff, Nelson, & Troscianko, 1995), flashed blank screen (Rensink et al., 1997), blink (O’Regan, Deubel, Clark, & Rensink, 2000), transient (O’Regan, Rensink, & Clark, 1999; Rensink, O’Regan, & Clark, 2000), movie cut or pan (Levin & Simons, 1997; Simons, 1996), or an occlusion event (Levin, Simons, Angelone, & Chabris, 2002; Simons & Levin, 1998). Change blindness can also occur in the absence of a disruption, provided the change occurs gradually enough that it does not attract attention (Simons, Franconeri, & Reimer, 2000). -/- Failures of visual awareness have been induced in a number of ways. For example, observers often fail to report a visible but unexpected stimulus when attention is focused on some other object or event in the display (inattentional blindness). As for change blindness, inattentional blindness occurs for both simple (Mack & Rock, 1998; Most et al., 2001) and naturalistic stimuli (Simons & Chabris, 1999). Similarly, repeated instances of an item often go undetected when embedded in a rapid sequence (repetition blindness), a phenomenon that occurs for both words and pictures (Kanwisher, 1987; Kanwisher & Potter, 1990). Observers can also fail to detect a stimulus in a rapid stream of stimuli provided they had to perform an attention-demanding task shortly before the stimulus appeared (Shapiro, Arnell, & Raymond, 1997). The surprisingly large variety of conditions that induce failures of conscious perception reinforces the broad conclusion that we are often unaware of what would otherwise be fully-visible stimuli. -/- Along with an increased appreciation of the limitations of visual awareness has come a renewed interest in using these limitations to explore the nature of the representations and processes underlying our visual experience. Are these limitations due to failures of perception? Of attention? Of memory? What is preserved with and without awareness? -/- The papers in this special issue of the Journal of Vision provide examples of exciting new work on induced failures of visual awareness and the mechanisms that underlie them. For example, several papers examine whether observers are drawn to parts of a display by the stimulus features or whether top-down control or semantic comprehension influence search through a display. Others investigate the nature of and limits on the information that is preserved from one view to the next and how much information needs to be retained for effective perception and action. As guest editors, we hope that this special issue will illustrate how studying the relationship between visual awareness and visual representations can lead to important new insights into the nature of seeing. (shrink)

The process-dissociation procedure was used to estimate the influence of spatial and form-based processing in the Simon task. Subjects made manual responses to the direction of arrows . The results provide evidence that the form and spatial location of a single stimulus can have functionally independent effects on performance. They also indicate the existence of two kinds of automaticity—an associative component that reflects prior S-R mappings and a nonassociative component that reflects the correspondence between stimulus and response codes.

Recently, a number of experiments have emphasized the degree to which subjects fail to detect large changes in visual scenes. This finding, referred to as “change blindness,” is often considered surprising because many people have the intuition that such changes should be easy to detect. Levin, Momen, Drivdahl, and Simons documented this intuition by showing that the majority of subjects believe they would notice changes that are actually very rarely detected. Thus subjects exhibit a metacognitive error we refer to (...) as “change blindness blindness.” Here, we test whether CBB is caused by a misestimation of the perceptual experience associated with visual changes and show that it persists even when the pre- and postchange views are separated by long delays. In addition, subjects overestimate their change detection ability both when the relevant changes are illustrated by still pictures, and when they are illustrated using videos showing the changes occurring in real time. We conclude that CBB is a robust phenomenon that cannot be accounted for by failure to understand the specific perceptual experience associated with a change. (shrink)

Kinematic properties of reaching movements reflect constraints imposed on the joint angles. Contemporary models present solutions to the redundancy problem by a pseudoinverse procedure or without any inversion. Feldman & Levin suggest a procedure based on a regular inversion. These procedures are considered as an outcome of a more general approach.

A hierarchical ordering of approaches afflicts environmental thinking. An ethics of individualism unjustly overrides social/political philosophy in environmental debates. Dialectics helps correct this imbalance. In dialectical fashion, a synthesis emerges between conflicting approaches to dialectics and to nature from: Marxism (Levins and Lewontin), anarchism (Bookchin), and Native Americanism (Black Elk). Conflicting (according to Marxists) and cooperative (according to anarchists) forces both operate in nature. Ethics (anarchist), political theory (Marxist), and spirituality (Native American) constitute the interconnected interpretative domains of a dialectically (...) informed ecophilosophy. In a world painted too often in blacks and whites, ecological dialectics colors the picture a more realistic gray. (shrink)

John Stuart Mill's best-known work is On Liberty. In it he declared that Western society was in danger of coming to a standstill. This was an extraordinarily pessimistic claim in view of Britain's global dominance at the time and one that has been insufficiently investigated in the secondary literature. The wanting model was that of China, a once advanced civilization that had apparently ossified. To understand how Mill came to this conclusion requires one to investigate his notion of the stages (...) from barbarism to civilization, and also his belief in imperialism as part of the civilizing process. Here India plays a central role, as both Mill and his father worked for the East India Company. This study, then, investigates the relationship between Mill's liberalism and his justification of imperialism. It takes us into the Utilitarianism of his family background, and such other influences as Romanticism, Scottish political economy and such key French thinkers as Saint- Simon, Guizot, Comte and Tocqueville. Mill, then, provides the focus of a debate on the origins, meaning, and consequences of Western civilization. It encompasses discourses on colonialism and orientalism, on Enlightenment optimism and conservative despair, on the need for leadership and the advance of democracy; in short, on the blessings, curses and dangers of modernization from approximately the time of the American and French revolutions to that of the so-called mid-Victorian calm in which On Liberty was written. Furthermore, current political issues concerning the West and Islamic countries have heightened interest in just the kind of question that this book discusses: that of how the West relates to, and assesses, the rest of the world. (shrink)

_On Heidegger's Being and Time_ is an outstanding exploration of Heidegger's most important work by two major philosophers. Simon Critchley argues that we must see _Being and Time_ as a radicalization of Husserl's phenomenology, particularly his theories of intentionality, categorial intuition, and the phenomenological concept of the a priori. This leads to a reappraisal and defense of Heidegger's conception of phenomenology. In contrast, Reiner Schürmann urges us to read Heidegger 'backward', arguing that his later work is the key to (...) unravelling _Being and Time_. Through a close reading of _Being and Time_ Schürmann demonstrates that this work is ultimately aporetic because the notion of Being elaborated in his later work is already at play within it. This is the first time that Schürmann's renowned lectures on Heidegger have been published. The book concludes with Critchley's reinterpretation of the importance of authenticity in _Being and Time_. Arguing for what he calls an 'originary inauthenticity', Critchley proposes a relational understanding of the key concepts of the second part of _Being and Time_: death, conscience and temporality. (shrink)

Interventions that are designed to stem plagiarism do not always override the motivation of individuals to cheat and, therefore, may not diminish misconduct. To inform more effective approaches, we conducted a systematic review to clarify the psychological causes of plagiarism. This review of 83 empirical papers showed that a specific blend of circumstances may foster plagiarism: an emphasis on competition and success rather than development and cooperation coupled with impaired resilience, limited confidence, impulsive tendencies, and biased cognitions. Fortunately, whenever students (...) feel their life and studies align to their future aspirations, many of these circumstances tend to dissipate. (shrink)

It is often claimed by environmental philosophers and green political theorists that liberalism, the dominant tradition of western political philosophy, is too focused on the interests of human individuals to give due weight to the environment for its own sake. In "How to be a Green Liberal", Simon Hailwood challenges this view and argues that liberalism can embrace a genuinely 'green', non-instrumental view of nature. The book's central claim is that nature's 'otherness', its being constituted of independent entities and (...) processes that do not reflect our purposes, is a basis for value and can be incorporated within liberal political philosophy as a fundamental commitment alongside human freedom and equality. Hailwood argues that the conceptual resources already exist within mainstream liberalism for a thoroughly non-instrumental perspective. Adopting a rigorous philosophical approach Hailwood tackles a wide range of themes across environmental ethics, including holistic theories, deep ecology, eco-feminism and eco-anarchism, as well as issues in value theory and political philosophy more generally. In making the case for liberalism's green credentials "How to be a Green Liberal" is a formidable challenge to recent green political theory and will be required reading not only for students of political philosophy but for all those interested in the natural world and man's relationship to it. (shrink)

It is often claimed by environmental philosophers and green political theorists that liberalism, the dominant tradition of western political philosophy, is too focused on the interests of human individuals to give due weight to the environment for its own sake. In "How to be a Green Liberal", Simon Hailwood challenges this view and argues that liberalism can embrace a genuinely 'green', non-instrumental view of nature. The book's central claim is that nature's 'otherness', its being constituted of independent entities and (...) processes that do not reflect our purposes, is a basis for value and can be incorporated within liberal political philosophy as a fundamental commitment alongside human freedom and equality. Hailwood argues that the conceptual resources already exist within mainstream liberalism for a thoroughly non-instrumental perspective. Adopting a rigorous philosophical approach Hailwood tackles a wide range of themes across environmental ethics, including holistic theories, deep ecology, eco-feminism and eco-anarchism, as well as issues in value theory and political philosophy more generally. In making the case for liberalism's green credentials "How to be a Green Liberal" is a formidable challenge to recent green political theory and will be required reading not only for students of political philosophy but for all those interested in the natural world and man's relationship to it. (shrink)

Many environmental scientists, scholars and activists characterise our situation as one of alienation from nature, but this notion can easily seem meaningless or irrational. In this book, Simon Hailwood critically analyses the idea of alienation from nature and argues that it can be a useful notion when understood pluralistically. He distinguishes different senses of alienation from nature pertaining to different environmental contexts and concerns, and draws upon a range of philosophical and environmental ideas and themes including pragmatism, eco-phenomenology, climate (...) change, ecological justice, Marxism and critical theory. His novel perspective shows that different environmental concerns - both anthropocentric and nonanthropocentric - can dovetail, rather than compete with, each other, and that our alienation from nature need not be something to be regretted or overcome. His book will interest a broad readership in environmental philosophy and ethics, political philosophy, geography and environmental studies. (shrink)

This book examines the general liberal aspiration of neutrality whilst moving discussion of Nozick's moral and political philosophy on from Anarchy, State and Utopia. Using neutralism as a unifying theme it connects his views on ethics, value and pluralism with the earlier libertarianism, combining an up to date critique of Nosick with a fresh view of neutrality.

There has recently been a reappraisal of value in UK construction and calls from a wide range of influential individuals, professional institutions and government bodies for the industry to exceed stakeholders’ expectations and develop integrated teams that can deliver world class products and services. As such value is certainly topical, but the importance of values as a separate but related concept is less well understood. Most construction firms have well-defined and well-articulated values, expressed in annual reports and on websites; however, (...) the lack of rigorous and structured approaches published within construction management research and the practical, unsupported advice on construction institution websites may indicate a shortfall in the approaches used. This article reviews and compares the content and␣structure of some of the most widely used values approaches, and discusses their application within the construction sector. One of the most advanced and empirically tested theories of human values is appraised, and subsequently adopted as a suitable approach to eliciting and defining shared organisational values. Three studies within six construction organisations demonstrate the potential application of this individually grounded approach to reveal and align the relative values priorities of individuals and organisations to understand the strength of their similarity and difference. The results of these case studies show that this new universal values structure can be used along with more qualitative elicitation techniques to understand organisational cultures. (shrink)

In this paper I address the issue of how far libertarianism can serve as the theoretical framework for a political morality excluding serious obligations to the needy. This issue has been raised recently by Gillian Brock who argues that even those adopting a thoroughgoing libertarianism, such as that of Robert Nozick, must recognise significant obligations to the needy as a condition of claiming exclusive property rights. I argue that Brock fails to demonstrate this. After briefly describing Brock's main argument I (...) discuss the acquisition of libertarian property rights, and try to show there are sufficient resources in Nozick's account for him to accept her main conclusion in principle without recognising significant obligations. Then, after some supplementary discussion, I sketch two different lines of argument. One uses the issue of corporate liability. The other focusses on problems with Nozick's "entitlement" principle of rectification. I try to show that even if the libertarian entitlement theory of property rights, their acquisition and transfer, is accepted, this gives no grounds for resisting claims for redistribution based on others' needs. (shrink)

Clarke and Beck assume that approximate number system representations should be assigned referents from our scientific ontology. However, many representations, both in perception and cognition, do not straightforwardly refer to such entities. If we reject Clarke and Beck's assumption, many possible contents for ANS representations besides number are compatible with the evidence Clarke and Beck cite.

Recent influential accounts of temporal representation—the use of mental representations with explicit temporal contents, such as before and after relations and durations—sharply distinguish representation from mere sensitivity. A common, important picture of inter-temporal rationality is that it consists in maximizing total expected discounted utility across time. By analyzing reinforcement learning algorithms, this article shows that, given such notions of temporal representation and inter-temporal rationality, it would be possible for an agent to achieve inter-temporal rationality without temporal representation. It then explores (...) potential upshots of this result for theorizing about rationality and representation. (shrink)

Prompted by a recommendation of the two Christian hospital associations in Germany, the Neu-Mariahilf Hospital in Goettingen set up a health ethics committee in autumn 1998. It is the committee's task to give support to staff members, patients and their relatives in individual cases where ethical dilemmas arise. The following article descibes the committee's work by means of three cases.

Respect for victims requires that we have social systems for punishing and condemning (reproving) serious crimes. But, the conditions of social marginalization and political subordination of the communities from which an overwhelming number of prisoners in the United States come place serious barriers in the face of effective reprobation. Mass incarceration makes this problem worse by disrupting and disrespecting entire communities. While humanities education in the prisons is far from a total solution, it is one way to make reprobation meaningful, (...) so long as the prison classroom is a place where the educators’ values are also put at risk. (shrink)