This study tested four theoretical models of leadership with data from the ethnographic record. The first was a game-theoretical model of leadership in collective actions, in which followers prefer and reward a leader who monitors and sanctions free-riders as group size increases. The second was the dominance model, in which dominant leaders threaten followers with physical or social harm. The third, the prestige model, suggests leaders with valued skills and expertise are chosen by followers who strive to emulate them. The (...) fourth proposes that in small-scale, kin-based societies, men with high neural capital are best able to achieve and maintain positions of social influence (e.g., as headmen) and thereby often become polygynous and have more offspring than other men, which positively selects for greater neural capital. Using multiple search strategies we identified more than 1000 texts relevant to leadership in the Probability Sample of 60 cultures from the Human Relations Area Files (HRAF). We operationalized the model with variables and then coded all retrieved text records on the presence or absence of evidence for each of these 24 variables. We found mixed support for the collective action model, broad support for components of the prestige leadership style and the importance of neural capital and polygyny among leaders, but more limited support for the dominance leadership style. We found little evidence, however, of emulation of, or prestige-biased learning toward, leaders. We found that improving collective actions, having expertise, providing counsel, and being respected, having high neural capital, and being polygynous are common properties of leaders, which warrants a synthesis of the collective action, prestige, and neural capital and reproductive skew models. We sketch one such synthesis involving high-quality decision-making and other computational services. (shrink)

(1) The induced colours led to perceptual grouping and pop-out, (2) a grapheme rendered invisible through ‘crowding’ or lateral masking induced synaesthetic colours — a form of blindsight — and (3) peripherally presented graphemes did not induce colours even when they were clearly visible. Taken collectively, these and other experiments prove conclusively that synaesthesia is a genuine percep- tual phenomenon, not an effect based on memory associations from childhood or on vague metaphorical speech. We identify different subtypes of number–colour synaesthesia (...) and propose that they are caused by hyperconnectivity between col- our and number areas at different stages in processing; lower synaesthetes may have cross-wiring (or cross-activation) within the fusiform gyrus, whereas higher synaesthetes may have cross-activation in the angular gyrus. This hyperconnec- tivity might be caused by a genetic mutation that causes defective pruning of con- nections between brain maps. The mutation may further be expressed selectively (due to transcription factors) in the fusiform or angular gyri, and this may explain the existence of different forms of synaesthesia. If expressed very diffusely, there may be extensive cross-wiring between brain regions that represent abstract concepts, which would explain the link between creativity, metaphor and synaesthesia (and the higher incidence of synaesthesia among artists and poets). Also, hyperconnectivity between the sensory cortex and amygdala would explain the heightened aversion synaesthetes experience when seeing numbers printed in the ‘wrong’ colour. Lastly, kindling (induced hyperconnectivity in the temporal lobes of temporal lobe epilepsy [TLE] patients) may explain the purported higher incidence of synaesthesia in these patients. We conclude with a synaesthesia-based theory. (shrink)

We studied two otherwise normal, synaesthetic subjects who `saw' a speci¢c colour every time they saw a speci¢c number or letter. We conducted four experiments in order to show that this was a genuine perceptual experience rather than merely a memory association. (i)The synaesthetically induced colours could lead to perceptual grouping, even though the inducing numerals or letters did not. (ii)Synaesthetically induced colours were not experienced if the graphemes were presented peripherally. (iii)Roman numerals were ine¡ective: the actual number grapheme was (...) required. (iv)If two graphemes were alternated the induced colours were also seen in alternation. However, colours were no longer experienced if the graphemes were alternated at more than 4 Hz. We propose that grapheme colour synaesthesia arises from `cross-wiring' between the `colour centre' (area V4 or V8)and the `number area', both of which lie in the fusiform gyrus. We also suggest a similar explanation for the representation of metaphors in the brain: hence, the higher incidence of synaesthesia among artists and poets. (shrink)

Clarke and Beck suggest that the ratio processing system may be a component of the approximate number system, which they suggest represents rational numbers. We argue that available evidence is inconsistent with their account and advocate for a two-systems view. This implies that there may be many access points for numerical cognition – and that privileging the ANS may be a mistake.

This article supplements our earlier paper on synaesthesia published in JCS (Ramachandran & Hubbard, 2001a). We discuss the phenomenology of synaesthesia in greater detail, raise several new questions that have emerged from recent studies, and suggest some tentative answers to these questions.

Cook et al. argue that mirror neurons originate from associative learning processes, without evolutionary influence from social-cognitive mechanisms. We disagree with this claim and present arguments based upon cross-species comparisons, EEG findings, and developmental neuroscience that the evolution of mirror neurons is most likely driven simultaneously and interactively by evolutionarily adaptive psychological mechanisms and lower-level biological mechanisms that support them.

In this commentary we discuss a predictive sensorimotor illusion, the size-weight illusion, in which the smaller of two objects of equal weight is perceived as heavier. We suggest that Grush's emulation theory can explain this illusion as a mismatch between predicted and actual sensorimotor feedback, and present preliminary data suggesting that the cerebellum may be critical for implementing the emulator.

Jones and Coleman are among a handful of otherwise normal as a child and the number 5 was red and 6 was green. This the- people who have synesthesia. They experience the ordinary ory does not answer why only some people retain such vivid world in extraordinary ways and seem to inhabit a mysterious sensory memories, however. You might _think _of cold when you no-man’s-land between fantasy and reality. For them the sens- look at a picture of an ice cube, (...) but you probably do not feel es—touch, taste, hearing, vision and smell—get mixed up in- cold, no matter how many encounters you may have had with stead of remaining separate. ice and snow during your youth. Modern scientists have known about synesthesia since Another prevalent idea is that synesthetes are merely being 1880, when Francis Galton, a cousin of Charles Darwin, pub- metaphorical when they describe the note C flat as “red” or say lished a paper in _Nature _on the phenomenon. But most have that chicken tastes “pointy”—just as you and I might speak of brushed it aside as fakery, an artifact of drug use (LSD and a “loud” shirt or “sharp” cheddar cheese. Our ordinary lan- mescaline can produce similar effects) or a mere curiosity. guage is replete with such sense-related metaphors, and perhaps About four years ago, however, we and others began to un- synesthetes are just especially gifted in this regard. cover brain processes that could account for synesthesia. Along We began trying to find out whether synesthesia is a gen- the way, we also found new clues to some of the most mysteri- uine sensory experience in 1999. This deceptively simple ques- ous aspects of the human mind, such as the emergence of ab- tion had plagued researchers in this field for decades. One nat- stract thought, metaphor and perhaps even language. ural approach is to start by asking the subjects outright: “Is this A common explanation of synesthesia is that the affected just a memory, or do you actually see the color as if it were right people are simply experiencing childhood memories and asso- in front of you?” When we tried asking this question, we did ciations.. (shrink)

Synesthesia is a fascinating phenomenon which has captured the imagination of scientists and artists alike. This inherited condition gives rise to a kind of 'merging of the senses. The Oxford Handbook of Synesthesia brings together a broad body of knowledge about this conditions into one definitive state-of-the-art handbook.

Synesthesia is a fascinating phenomenon which has captured the imagination of scientists and artists alike. This inherited condition gives rise to a kind of 'merging of the senses. The Oxford Handbook of Synesthesia brings together a broad body of knowledge about this conditions into one definitive state-of-the-art handbook.

This chapter looks at synaesthesia in school aged children from approximately 5-6 years onwards. We examine how synaesthesia develops from its earliest roots both behaviourally and neurologically, and describe how this development can be affected by literacy and learning. We present evidence showing that synaesthesia emerges over time undergoing stages of 'growth' from an immature to more mature form. We also discuss the prevalence of childhood synaesthesia and the methodologies available for testing this. Next we consider how the condition can (...) have an effect on a child's schooling experience and consider both its psychological and social impact. We show where the condition has costs and benefits for synaesthetic individuals and offer suggestions for parents and educators in their approach to dealing with the synaesthetic child. (shrink)

The formulation of propositional modal logic is revised by interposing a domain of structured propositions between the modal language and the models. Interpretations of the language (i.e., ways of mapping the language into the domain of propositions) are distinguished from models of the domain of propositions (i.e., ways of assigning truth values to propositions at each world), and this contrasts with the traditional formulation. Truth and logical consequence are defined, in the first instance, as properties of, and relations among, propositions. (...) -/- These definitions have certain interesting consequences. One is that they resolve a question that cannot be answered by the traditional analysis, in which Kripke models directly interpret modal language. The question is, is the reason a modal sentence has a different truth value at other possible worlds due to the fact that the sentence has a different meaning at that world or due to a change in the world? The philosophical conception elaborates the second answer. Another interesting consequence is that modal language, properly speaking, is not intensional, at least according to the classic tests for, and definitions of, intensionality. (shrink)

Prominent models of attentional control assert a dichotomy between top-down and bottom-up control, with the former determined by current selection goals and the latter determined by physical salience. This theoretical dichotomy, however, fails to explain a growing number of cases in which neither current goals nor physical salience can account for strong selection biases. For example, equally salient stimuli associated with reward can capture attention, even when this contradicts current selection goals. Thus, although 'top-down' sources of bias are sometimes defined (...) as those that are not due to physical salience, this conception conflates distinct - and sometimes contradictory - sources of selection bias. We describe an alternative framework, in which past selection history is integrated with current goals and physical salience to shape an integrated priority map. (shrink)

Edward Erwin's clear analysis addresses some of the fundamental questions on behavior therapy that remained in 1978, when this book was first published.

Are humans rational? Various experiments performed over the last several decades have been interpreted as showing that humans are irrational we make significant and consistent errors in logical reasoning, probabilistic reasoning, similarity judgements, and risk-assessment, to name a few areas. But can these experiments establish human irrationality, or is it a conceptual truth that humans must be rational, as various philosophers have argued? In this book, Edward Stein offers a clear critical account of this debate about rationality in philosophy (...) and cognitive science. He discusses concepts of rationality - the pictures of rationality that the debate centres on - and assesses the empirical evidence used to argue that humans are irrational. He concludes that the question of human rationality must be answered not conceptually but empirically, using the full resources of an advanced cognitive science. Furthermore, he extends this conclusion to argue that empirical considerations are also relevant to the theory of knowedge - in other words, that epistemology should be naturalized. from the reviews: 'Stein has done a great service in bringing together all of the important arguments in the human rationality debate and providing a measured critical assessment of them.... This will be an important book and is essential reading for epistemologists, philosophers of mind, and cognitive and evolutionary psychologists.' Choice 'very considerable value... for professionals' Times Higher Education Supplement. (shrink)

This paper discusses certain conceptual tensions in a set of archeological texts from the Warring States period, the Guodian corpus. One of the central themes of the Guodian corpus is the disanalogy between spontaneous, natural familial relationships and artificial political relationships. This is problematic because, like many early Chinese texts, the Guodian corpus believes that political relationships must come to be characterized by unselfconsciousness and spontaneity if social order is to prevail. This tension will be compared to my earlier work (...) on the “paradox of wu-wei (effortless action),” and the Guodian corpus’ “solution” to the problem of teaching spontaneity—drawing upon the transformative power of music—will be placed within the landscape of early “Confucian” and “Daoist” theories concerning human nature and self-cultivation. (shrink)

This paper explores the moral responsibility a manager has toward a worker. The primary focus is upon those relationships whereworkers have been led to trust their managers. I argue that in such circumstances, models of the employment relationship based on rational self-interest fail to adequately describe the behavior of the actors. Rather, I show through case studies how trust operates in these environments to supercede pure, self-interested behavior. I then explore the moral implications of this finding relative to those managers (...) who lead their workers to trust them. I make the claim that these managers cannot adequately discharge their moral obligations unless they take on positive moral obligations. I cast this responsibility as one of positive care for some portion of worker welfare and briefly discuss what this might mean in practice. (shrink)

The author of this article maintains that Ayn Rand’s version of virtue ethics can provide a powerful basis for operating a successful business organization. An argument is made that Ayn Rand’s Objectivist virtues can serve as an underpinning for a firm’s long-term sustainable success as well as for the flourishing and happiness of its employees. In order to attain a company’s goals, values, and purpose, these virtues must be integrated with the firm’s vision, culture, and climate. The Objectivist virtues are (...) said to provide an integrated framework for employees’ decisions and actions. Leaders must link these virtues to the survival and success of both the firm and its employees. Toward the end of the paper a diagram is presented to aid the reader in visualizing the linkages among the ideas presented therein. (shrink)

Saul Kripke has proposed an argument to show that there is a serious problem with many computational accounts of physical systems and with functionalist theories in the philosophy of mind. The problem with computational accounts is roughly that they provide no noncircular way to maintain that any particular function with an infinite domain is realized by any physical system, and functionalism has the similar problem because of the character of the functional systems that are supposed to be realized by organisms. (...) This paper shows that the standard account of what it is for a physical system to compute a function can avoid Kripke's criticisms without being reduced to circularity; a very minor and natural elaboration of the standard account suffices to save both functionalist theories and computational accounts generally. (shrink)

Given Heidegger’s inflammatory remarks about the intellectual poverty of modern logic, it may come as a surprise to be told that he has something to contribute to the philosophy of logic. One of the rewards of Daniel Dahlstrom’s Heidegger’s Concept of Truth is its argument that Heidegger can illuminate such issues in the philosophy of logic as the character of propositions, the nature of bivalence, and the concept of truth. Dahlstrom focuses on Heidegger’s work in the years immediately before and (...) after the publication of Being and Time, with particular emphasis on the lecture courses from this period, especially the one published as Logik: Die Frage nach der Wahrheit. (shrink)

Using a general model of corruption that explains and accounts for corruption across different corporate and professional activities, the paper will examine how certain practices in the media, especially in areas where journalism, advertising and public relations regularly intersect and converge, can be construed as instances of corruption. By applying this general model of corruption the paper will then offer a taxonomy of media corruption by identifying most if not all the major types of media corruption. It will be argued (...) that such corruption is regular and systematic. (shrink)

This entry introduces the reader to the main ideas in Frege's philosophy of logic, mathematics, and language.

Purpose The purpose of this paper is to demonstrate how some of the information and communication practices of the Tech Media and specifically of Facebook, constitute media corruption. The paper will examine what the professional role of Facebook is regarding its information/communication practices and then demonstrate that Facebook is essentially a media company and not merely a “platform,” therefore liable to the same normative responsibilities as other media companies. Design/methodology/approach Applying the dual obligation information theory, a normative information and communication (...) theory that applies generally to all media companies that disseminate and share information, the paper demonstrates that Facebook’s role of mediating and curating the information of its users places upon it a normative editing responsibility, to ensure both the preventive detection and corrective editing of fake news, as well as other forms of misinformation disseminated on its platform. Finally, applying a philosophical model of media corruption the paper will demonstrate that Facebook’s role in the Cambridge Analytica case was not only unethical but moreover, constituted media corruption. Findings The paper concludes that Facebook’s media corruption illustrated in the Cambridge Analytica case is not a one-off case but the result of a systemic and inherent conflict of interest between its business model of selling users’ information to advertisers and its normative media role rendering the conflict of interest between those two roles conducive to media corruption. Originality/value The paper's originality is twofold. It demonstrates that Facebook is a media company normatively accountable on the basis of an original theory the DOIT and moreover, on the basis of an original media corruption theory its actions in the Cambridge Analytica case constituted media corruption. (shrink)