We demonstrate “economies of experience” in eye-movement patterns—that is, optimization of eye-movement patterns aimed at more efficient and less costly visual processing, similar to the priming-induced formation of sparser cortical representations or reduced reaction times. Participants looked at Mooney-type, degraded stimuli that were difficult to recognize without prior experience, but easily recognizable after exposure to their undegraded versions. As predicted, eye-movement dispersion, velocity, and the number of fixations decreased with each stimulus presentation. Further analyses showed that this effect (...) was contingent on recognition, and the selection of information from the stimulus could be informed by the identity of the presented object. Finally, our study demonstrates that after exposure to the undegraded version of the stimulus, eye-movement patterns associated with its degraded and undegraded versions become more similar. This suggests that eye-movement patterns can evolve to facilitate the optimal processing of a given stimulus via experience-driven perceptual learning. (shrink)

This article summarizes a variety of current as well as previous research in support of a new theory of consciousness. Evidence has been steadily accumulating that information about a stimulus complex is distributed to many neuronal populations dispersed throughout the brain and is represented by the departure from randomness of the temporal pattern of neural discharges within these large ensembles. Zero phase lag synchronization occurs between discharges of neurons in different brain regions and is enhanced by presentation of stimuli. (...) This evidence further suggests that spatiotemporal patterns of coherence, which have been identified by spatial principal component analysis, may encode a multidimensional representation of a present or past event. How such distributed information is integrated into a holistic percept constitutes the binding problem. How a percept defined by a spatial distribution of nonrandomness can be subjectively experienced constitutes the problem of consciousness. Explanations based on a discrete connectionistic network cannot be reconciled with the relevant facts. Evidence is presented herein of invariant features of brain electrical activity found to change reversibly with loss and return of consciousness in a study of 176 patients anesthetized during surgical procedures. A review of relevant research areas, as well as the anesthesia data, leads to a postulation that consciousness is a property of quantumlike processes, within a brain field resonating within a core of structures, which may be the neural substrate of consciousness. This core includes regions of the prefrontal cortex, the frontal cortex, the pre- and paracentral cortex, thalamus, limbic system, and basal ganglia. (shrink)

The current state of British sociology of education is reviewed; noting its decline, but suggesting that its influence has been dispersed throughout educational research in Britain. It is argued that its fate is not simply a product of external attack but also derives from internal problems. Against this background, it is suggested that postmodernism can be treated as a stimulus for a fundamental reconsideration of the proper nature and role of academic research on education.

In two experiments we demonstrate a substantial cross‐cultural difference in a mnemonic context effect, whereby a magnitude estimate of a simple stimulus such as a line or circle is biased toward the center of the distribution of previously seen instances of the same class. In support of the hypothesis that Asians are more likely than Americans to disperse their attention to both the target stimulus and its mnemonic context, this effect was consistently larger for Japanese than for Americans. (...) Moreover, the cultural difference was attenuated by an experimentally induced belief in class homogeneity that augmented the context effect itself in both cultures. More important, these belief effects happened in the absence of any objective change in stimulus distribution. Implications for sociocultural shaping of cognition are discussed. (shrink)

Following Schelling (1960), coordination problems have mainly been considered in a context where agents can achieve a common goal (e.g., rendezvous) only by taking common actions. Dynamic versions of this problem have been studied by Crawford and Haller (1990), Ponssard (1994), and Kramarz (1996). This paper considers an alternative dynamic formulation in which the common goal (dispersion) can only be achieved by agents taking distinct actions. The goal of spatial dispersion has been studied in static models of habitat (...) selection, location or congestion games, and network analysis. Our results show how this goal can be achieved gradually, by indistinguishable non-communicating agents, in a dynamic setting. (shrink)

For the faithful there is much to ponder. In this short book, based on lectures delivered in Spain in 1990, Quine begins by locating his work historically.

Drawing on a forthcoming book by Rok Benčin on the concept of world, the article proposes a reading of _Between the Acts_ by Virginia Woolf that focuses on the dialectic of dispersion and unity. The novel presents a multiplicity of dispersed and fragmented transcendental frameworks that tend towards – an attempt that is always doomed to fail, but always begins anew – unification within the ideological apparatuses. In this endless dialectic, literature occupies a singular place, for the fictional structure (...) of these frameworks makes of it a transcendental-abyss, which enables passage from the novel of worlds to the world of the novel. (shrink)

W. V. Quine is one of the most eminent philosophers alive today. Now in his mid-eighties he has produced a sharp, sprightly book that encapsulates the whole of his philosophical enterprise, including his thinking on all the key components of his epistemological stance--especially the value of logic and mathematics. New readers of Quine may have to go slowly, fathoming for themselves the richness that past readers already know lies between these elegant lines. For the faithful there is much to ponder. (...) In this short book, based on lectures delivered in Spain in 1990, Quine begins by locating his work historically. He provides a lightning tour of the history of philosophy (particularly the history of epistemology), beginning with Plato and culminating in an appreciative sketch of Carnap's philosophical ambitions and achievements. This leads, in the second chapter, to an introduction to Quine's attempt to naturalize epistemology, which emphasizes his continuities with Carnap rather than the differences between them. The next chapters develop the naturalistic story of the development of science to take account of how our conceptual apparatus is enhanced so that we can view the world as containing re-identifiable objects. Having explained the role of observation sentences in providing a checkpoint for assessing scientific theories, and having despaired of constructing an empirical criterion to determine which sentences are meaningful, Quine in the remaining chapters takes up a variety of important issues about knowledge. He concludes with an extended treatment of his views about reference and meaning and his attitudes toward psychological and modal notions. The presentation is distinctive, and the many small refinements of detail and formulation will fascinate all who know Quine's philosophy. (shrink)

In multiethnic and multi-religious democracies, the chronic danger is that candidates will engage in “identity politics,” appealing to one locally preponderant ethnic group against other groups. The usual formulas for composing multiethnic democracies—ethnic federalism and/or proportional representation—often exacerbate the problem, ethnicizing political campaigns and carving up the national legislature into ethnic blocs, each beholden only to its own group. An alternative approach—what I call “dispersed constituency democracy”—is to match each legislative seat with a constituency that reflects the overall ethnic composition (...) of the society in question, so as to encourage candidates to reach across ethnic divisions rather than play to locally preponderant ones. I propose a simple way to do this, and explore the likely consequences for national electoral campaigns and legislative dynamics over a range of demographic circumstances. I also consider supplemental devices for protecting minority rights that would be made possible by the proposed constituency system. (shrink)

Competition for resources is one of the main evolutionary explanations for dispersal from the natal area. For humans this explanation has received little attention, despite the key role dispersal is thought to play in shaping social systems. I examine the link between dispersal and resources using historical data on people from the small farming town of Oakham, Massachusetts (1750–1850). I reconstruct individual life histories through a variety of records, identifying dispersers, their age at dispersal, and their destinations. I find that (...) sex, father’s wealth and social status, and age at father’s death were all significantly associated with one or more dispersal variables. Birth order and number of siblings were not significantly associated with any of the dispersal variables. I also use wills and deeds to study transfers of land from fathers to sons. More stayers than dispersers acquired Oakham land from their fathers, but some sons who acquired Oakham land later dispersed. I discuss the causality underlying the relationship between dispersal and resource acquisition, as well as implications for a general understanding of human dispersal. (shrink)

This paper concentrates on a debate over dispersion in the second half of the 1830s, in which both sides utilized the same set of experimental data to test a proposed wave account of dispersion, but could not agree on how these data should be used. The conflict regarding experimental data was caused by differences in instruments. In the debate, optical instruments in many ways functioned like paradigms, shaping scientists' opinions. Instruments also led the debate into an impasse, because (...) no apparatus was available for the necessary experimental replication. Because of unreconcilable differences regarding experimental evidence, the wave theory's failure in explaining dispersion did not become an obstacle to its acceptance. (shrink)

Stimuli that resemble humans, but are not perfectly human-like, are disliked compared to distinctly human and nonhuman stimuli. Accounts of this “Uncanny Valley” effect often focus on how changes in human resemblance can evoke different emotional responses. We present an alternate account based on the novel hypothesis that the Uncanny Valley is not directly related to ‘human-likeness’ per se, but instead reflects a more general form of stimulus devaluation that occurs when inhibition is triggered to resolve conflict between competing (...) stimulus-related representations. We consider existing support for this inhibitory-devaluation hypothesis and further assess its feasibility through tests of two corresponding predictions that arise from the link between conflict-resolving inhibition and aversive response: 1) that the pronounced disliking of Uncanny-type stimuli will occur for any image that strongly activates multiple competing stimulus representations, even in the absence of any human-likeness, and 2) that the negative peak of an ‘Uncanny Valley’ should occur at the point of greatest stimulus-related conflict and not (in the presence of human-likeness) always closer to the ‘human’ end of a perceptual continuum. We measured affective responses to a set of line drawings representing nonhuman animal-animal morphs, in which each continuum midpoint was a bistable image (Exp. 1), as well as to sets of human-robot and human-animal computer-generated morphs (Exp. 2). Affective trends depicting classic Uncanny Valley functions occurred for all continua, including the nonhuman stimuli. Images at continua midpoints elicited significantly more negative affect than images at endpoints, even when the continua included a human endpoint. This illustrates the feasibility of the inhibitory-devaluation hypothesis and the need for further research into the possibility that the strong dislike of Uncanny-type stimuli reflects the negative affective consequences of cognitive inhibition. (shrink)

The spatial aggregation/dispersion of the vegetation in a landscape affects landscape texture, with potentially important implications for its perception. The aim of the study was to investigate how plant dispersion and interspersion in small-scale landscapes could affect garden preference. Dispersion referred to the proximity and distance between plants, and interspersion referred to the degree of intermixing between plants of different species. Fifty-six participants evaluated 40 pairs of landscapes that differed in terms of plant dispersion or plant (...) interspersion. Participants were asked to rate their preference for each pair of landscapes. Furthermore, eye movements were recorded during the viewing time, and the number of fixations and fixation time were computed for each landscape image. Overall, plants arranged in a more dispersed and a more interspersed design resulted in a higher landscape preference. Dispersion was more effective than interspersion in affecting landscape preference. The number of fixations and fixation time were higher when viewing landscapes with plants arranged in a high-dispersion and high-interspersion layout. (shrink)

In diesem Buch verbindet Thomas Khurana eine innovative Neubeschreibung des zentralen Konzepts der Psychoanalyse mit wesentlichen Elementen neuerer Theorien des Sozialen. In drei originellen Studien zu Freud, Lacan und Luhmann wird die These vorgestellt, dass sich der Begriff des Unbewussten nur dann in seiner erschließenden Kraft entfalten kann, wenn das Unbewusste nicht mehr substantialistisch verstanden wird.

To evaluate dispersal patterns and concentrations of macroscopic charcoal particles around Stollo settlements in sub-arctic Scandinavia, their distributions following experimental burning and soil concentrations around an alpine Stollo settlement dating between AD 700 and 1150 were recorded. After the burning 98% of recorded particles were 0.1-0.5 mm long, 90% were dispersed within 40 m of the fire, their mean concentration 40 m from the fire was 0.14±0.08 particles/cm2 and the concentration decreased with increasing distance. At the settlement, 95% of recorded (...) charcoal particles were 0.1-0.5 mm long, 94% were within 40 m of the hearths, the mean concentration declined with increasing distance, and concentrations were much lower than expected from the experimental burning (e.g. 17.6±2.4 particles/cm2, 40 m away). In conclusion: biological archives used for charcoal analysis in archaeological and vegetation history studies should be located ?40 m from settlements, and data obtained from charcoal analyses should be interpreted cautiously. (shrink)

This paper highlights the renewed interest in Lucas’s explanation of the non-neutrality of money put forward in his 1972 article – explanation based on information dispersion and signal extraction...

Face perception is crucial in all social animals. Recent studies have shown that pre-stimulus oscillations of brain activity modulate the perceptual performance of face vs. non-face stimuli, specifically under challenging conditions. However, it is unclear if this effect also occurs during simple tasks, and if so in which brain regions. Here we used magnetoencephalography and a 1-back task in which participants decided if the two sequentially presented stimuli were the same or not in each trial. The aim of the (...) study was to explore the effect of pre-stimulus alpha oscillation on the perception of face and non-face stimuli. Our results showed that pre-stimulus activity in the left occipital face area modulated responses in the intra-parietal sulcus at around 170 ms after the presentation of human face stimuli. This effect was also found after participants were shown images of motorcycles. In this case, the IPS was modulated by pre-stimulus activity in the right OFA and the right fusiform face area. We conclude that pre-stimulus modulation of post-stimulus response also occurs during simple tasks and is therefore independent of behavioral responses. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy and Rhetoric 34.4 (2001) 335-342 [Access article in PDF] "Dispersing the Cogito: A Response to Vivian's Rhetorical Self" Philip Lewin Bradford Vivian ("The Threshold of the Self," Philosophy and Rhetoric 33. 4: 303-18), in seeking to disrupt the cogito, claims that acts of creative self-constitution by a "rhetorical self" become possible as subjectivity is dispersed across subject positions. However, the apparent ability of the rhetorical self to freely (...) choose which positions it will inhabit, as well as its apparent capacity to undergo subjectification without being marked by its habitation of those positions, seem to reintroduce several of the cogito's essential features.Vivian argues that "there is a historicity to our being and its expression, to our subjectivity and its elaboration" (303). His essay provides a clear and cogent account of how subjectivity might arise as the result of a series of rhetorical acts whose audience is the self. One's self, then, is a local and ongoing aesthetic formation, continually becoming and coming into being; to the extent that the aesthetic nature of this process is produced by persuading one's self to adopt some styles of life over others, then this process is a thoroughly persuasive phenomenon. The aesthetic composition molded by this continually renewed persuasion might best be described as the rhetorical self. (312; emphasis in original) Vivian clears away a good deal of the underbrush that often prevents us from getting a hold on the problematics of selfhood and subjectivity. I find much that is praiseworthy in the essay, particulary its explication of the contingent and shifting nature of the processes through which the self is formed and reformed. But there is a key theoretical elision in Vivian's argument that does much to restore the legitimacy of the Cartesian cogito that he is at pains to disrupt. The result is a model of self that revises Cartesianism by dispersing subjectivity among various subject positions, [End Page 335] but that, in a number of other important ways, preserves essential features of the cogito, as though each fragment of the dispersed cogito were itself a complete mini-cogito.Vivian's account elides the rhetorical process of self-formation. In a typical passage at the end of the essay, he comments, "In order to compose and cultivate one's being in the world, one must persuade one's self to choose and orchestrate certain styles of life from among those available into an entire aesthetics of being" (316-17). The questions this claim provokes are: How does this process of self-persuasion actually take place? What aspect or agency of psyche is doing the persuading? To conceive of the self as Vivian does--a self "conceived as a form--a rhetorical form--that exists only in its continual aesthetic creation, in its indefinite becoming" (304)--suggests a kind of autonomy and self-transparency in self-formation that has discouragingly Cartesian overtones.The terms with which Vivian has chosen to work, namely, subjectivity and the rhetorical self, do not address these issues of self-persuasion. Instead, they serve to mask them. Subjectivity, for Vivian, refers to the positions the self finds itself assuming within discursive regimes, positions whose formation entails moments both of self-persuasion and of subjection to existing social exigency. Subjectivity (so conceived) has the property of being an effect of multiple acts of subjectification, of voluntary acquiescence to preexisting subject positions. "Discourse creates subjects by first creating subject positions from which to speak" (313). The subject is not original, but rather follows from "an entire 'assemblage' of subject positions that are the willful creation of no one, but are instead formed by the complex operations of discourse" (313). The theoretical difficulty with this way of accounting for subjectivity lies in its elision of agency; how shall we make sense of the rhetorical self? More specifically, how does a necessary immersion into discursive practices couple with rhetorical acts of self-persuasion? What motivates self-persuasion? Are all the factors involved in self-persuasion fully conscious and under voluntary control? If not, how are we... (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy and Rhetoric 34.4 (2001) 335-342 [Access article in PDF] "Dispersing the Cogito: A Response to Vivian's Rhetorical Self" Philip Lewin Bradford Vivian ("The Threshold of the Self," Philosophy and Rhetoric 33. 4: 303-18), in seeking to disrupt the cogito, claims that acts of creative self-constitution by a "rhetorical self" become possible as subjectivity is dispersed across subject positions. However, the apparent ability of the rhetorical self to freely (...) choose which positions it will inhabit, as well as its apparent capacity to undergo subjectification without being marked by its habitation of those positions, seem to reintroduce several of the cogito's essential features.Vivian argues that "there is a historicity to our being and its expression, to our subjectivity and its elaboration" (303). His essay provides a clear and cogent account of how subjectivity might arise as the result of a series of rhetorical acts whose audience is the self. One's self, then, is a local and ongoing aesthetic formation, continually becoming and coming into being; to the extent that the aesthetic nature of this process is produced by persuading one's self to adopt some styles of life over others, then this process is a thoroughly persuasive phenomenon. The aesthetic composition molded by this continually renewed persuasion might best be described as the rhetorical self. (312; emphasis in original) Vivian clears away a good deal of the underbrush that often prevents us from getting a hold on the problematics of selfhood and subjectivity. I find much that is praiseworthy in the essay, particulary its explication of the contingent and shifting nature of the processes through which the self is formed and reformed. But there is a key theoretical elision in Vivian's argument that does much to restore the legitimacy of the Cartesian cogito that he is at pains to disrupt. The result is a model of self that revises Cartesianism by dispersing subjectivity among various subject positions, [End Page 335] but that, in a number of other important ways, preserves essential features of the cogito, as though each fragment of the dispersed cogito were itself a complete mini-cogito.Vivian's account elides the rhetorical process of self-formation. In a typical passage at the end of the essay, he comments, "In order to compose and cultivate one's being in the world, one must persuade one's self to choose and orchestrate certain styles of life from among those available into an entire aesthetics of being" (316-17). The questions this claim provokes are: How does this process of self-persuasion actually take place? What aspect or agency of psyche is doing the persuading? To conceive of the self as Vivian does--a self "conceived as a form--a rhetorical form--that exists only in its continual aesthetic creation, in its indefinite becoming" (304)--suggests a kind of autonomy and self-transparency in self-formation that has discouragingly Cartesian overtones.The terms with which Vivian has chosen to work, namely, subjectivity and the rhetorical self, do not address these issues of self-persuasion. Instead, they serve to mask them. Subjectivity, for Vivian, refers to the positions the self finds itself assuming within discursive regimes, positions whose formation entails moments both of self-persuasion and of subjection to existing social exigency. Subjectivity (so conceived) has the property of being an effect of multiple acts of subjectification, of voluntary acquiescence to preexisting subject positions. "Discourse creates subjects by first creating subject positions from which to speak" (313). The subject is not original, but rather follows from "an entire 'assemblage' of subject positions that are the willful creation of no one, but are instead formed by the complex operations of discourse" (313). The theoretical difficulty with this way of accounting for subjectivity lies in its elision of agency; how shall we make sense of the rhetorical self? More specifically, how does a necessary immersion into discursive practices couple with rhetorical acts of self-persuasion? What motivates self-persuasion? Are all the factors involved in self-persuasion fully conscious and under voluntary control? If not, how are we... (shrink)

Do we freely choose to do what we do? Or are we determined by what nature and history have made us? If we are so determined, then can we ever really be responsible for our actions? It is only by bad logic that metaphysics can deprive us of our freedom and our responsibility. But the contingencies of life are another matter. This paper argues that so many accidents of life create who we are and how we act that the responsibility (...) for what we do must be dispersed. There is no place where the buck stops. We are therefore called upon to moderate our resentment and to give up punitive morality in favor of a morality of love and redemption. (shrink)

Sound symbolism refers to non‐arbitrary mappings between the sounds of words and their meanings and is often studied by pairing auditory pseudowords such as “maluma” and “takete” with rounded and pointed visual shapes, respectively. However, it is unclear what auditory properties of pseudowords contribute to their perception as rounded or pointed. Here, we compared perceptual ratings of the roundedness/pointedness of large sets of pseudowords and shapes to their acoustic and visual properties using a novel application of representational similarity analysis (RSA). (...) Representational dissimilarity matrices (RDMs) of the auditory and visual ratings of roundedness/pointedness were significantly correlated crossmodally. The auditory perceptual RDM correlated significantly with RDMs of spectral tilt, the temporal fast Fourier transform (FFT), and the speech envelope. Conventional correlational analyses showed that ratings of pseudowords transitioned from rounded to pointed as vocal roughness (as measured by the harmonics‐to‐noise ratio, pulse number, fraction of unvoiced frames, mean autocorrelation, shimmer, and jitter) increased. The visual perceptual RDM correlated significantly with RDMs of global indices of visual shape (the simple matching coefficient, image silhouette, image outlines, and Jaccard distance). Crossmodally, the RDMs of the auditory spectral parameters correlated weakly but significantly with those of the global indices of visual shape. Our work establishes the utility of RSA for analysis of large stimulus sets and offers novel insights into the stimulus parameters underlying sound symbolism, showing that sound‐to‐shape mapping is driven by acoustic properties of pseudowords and suggesting audiovisual cross‐modal correspondence as a basis for language users' sensitivity to this type of sound symbolism. (shrink)

Si consideramos la declaración de la Ética Eudemia I 8, Aristóteles parece estar lejos de la metafísica pues, habiendo adoptado una tesis sobre la dispersión originaria del ser en las diferentes categorías, no tenía cómo pensar una ciencia única del ser, ya que, según parece, aún no había aplicado al ser una noción de unidad focal de la significación, que fue concebida, justamente en la EE, para explicar el fenómeno de la amistad. Cuando el pros hen legesthai sea aplicado al (...) ser entonces será posible una metafísica o ciencia única del ser por fuera del diapasón platónico. Hasta ese momento, sin embargo, Aristóteles se encuentra sin metafísica. En este artículo, procuro investigar a qué se parece tal período de desencanto metafísico de Aristóteles y qué huellas nos dejó eventualmente, de esta época. (shrink)

Plants are silent, still, or move slowly; we do not have the sense that they accompany us, or even perceive us. But is there something that plants are telling us? Is there something about how they live and connect, how they relate to the world and other plants that can teach us about ecological thinking, about ethics and politics? Grounded in Thoreau's ecology and in contemporary plant studies, Thoreau and Vegetal Thought offers answers to those questions by pondering such concepts (...) as co-dependence, the continuity of life forms, relationality, cohabitation, porousness, fragility, the openness of beings to incessant modification by other beings and phenomena, patience, waiting, slowness and receptivity. (shrink)