It has been reported that behavior of experts and novices in various sporting tasks is impervious to the introduction of blur. However, studies have used diverse methods of blurring the visual stimulus, and tasks that did not always preserve the normal perception-action coupling. In the current study, we developed a novel experimental protocol to examine the effect of different levels of Gaussian blur on interception performance and eye gaze data using an immersive VR task. Importantly, this provided a realistic (...) simulation of a real-world boxing scenario in which expert combat athletes experienced a first-person, adaptive viewpoint of the visual environment, which could be blurred according to their gaze location. We found that participants exhibited similar interception performance in the presence of central blur or peripheral blur compared to a control condition with no blur. However, interception performance was significantly better with a central blur compared to peripheral blur. Eye gaze data indicated that although participants fixated at similar areas of interest irrespective of the presence of blur, fixation duration was significantly longer with a strong level of blur in the peripheral viewing condition than all levels of central blur and the control condition. These findings can be explained by relocating attention to different areas of the environment, which thereby influenced the perception of salient information. Participants also performed better on the first punch of a sequence preceded by a foot feint compared to arm feint or no feint. Still, irrespective of feint type, performance was significantly better on the second and third punch compared to the first punch. These findings are consistent with participants using additional information from the opponent's body movements and situational probabilities to increase performance as the sequence of punches developed. Overall, these are the first evidence for the use of VR as a means to examine gaze-contingent manipulations of the environment, and hence highlight the potential for facilitating learning and transfer to a real sporting situations. (shrink)

Studies in the psychology of visual expertise have tended to focus on a limited set of expert domains, such as radiology and athletics. Conclusions drawn from these data indicate that experts use parafoveal vision to process images holistically. In this study, we examined a novel, as-of-yet-unstudied class of visual experts—architects—expecting similar results. However, the results indicate that architects, though visual experts, may not employ the holistic processing strategy observed in their previously studied counterparts. Participants (n = 48, 24 architects, 24 (...) naïve) were asked to find targets in chest radiographs and perspective images. All images were presented in both gaze-contingent and normal viewing conditions. Consistent with a holistic processing model, we expected two results: (1) architects would display a greater difference in saccadic amplitude between the gaze- contingent and normal conditions, and (2) architects would spend less time per search than an undergraduate control group. We found that the architects were more accurate in the perspectival task, but they took more time and displayed a lower difference in saccadic amplitude than the controls. Our research indicates a disjunctive conclusion. Either architects are simply different kinds of visual experts than those previously studied, or we have generated a task that employs visual expertise without holistic processing. Our data suggest a healthy skepticism for across-the-board inferences collected from a single domain of expertise to the nature of visual expertise generally. More work is needed to determine whether holism is a feature of all visual expertise. (shrink)

The present study employed the gaze-contingent window paradigm to investigate parafoveal and peripheral cueing and masking effects on saccadic selectivity in a triple-conjunction visual search task. In the cueing conditions, the information shown outside the gaze-contingent window was restricted to the feature or feature pair shared between the target and a particular distractor type. In the masking conditions, no stimulus features were shown outside the window. Significant cueing and masking effects on saccadic selectivity were observed for (...) saccades directed at items within the window, where all features were visible across experimental conditions. Cueing a particular feature or feature pair biased saccadic selectivity towards this feature or feature pair, while masking generally reduced saccadic selectivity. These findings support the concept of visual guidance being a preattentive process that operates in parallel across the display. © 2001 Published by Elsevier Science Ltd. (shrink)

Background: Individuals with Autism Spectrum Disorder (ASD) have pronounced difficulties in attending to relevant visual information during social interactions. Method: We designed and evaluated the feasibility of a novel method to train this ability, by exposing participants to virtual human characters displayed on a screen which was entirely blurred, except for a gaze-contingent viewing window that followed participants’ eyes direction. The goal was to incite participants to direct their gaze towards the facial expressions of the virtual characters. (...) Twenty-one adolescents with ASD who attended ordinary school were randomized to either an experimental group, who was trained during a month and a half, or to a control group. Social communicative abilities were assessed during pre, post and follow-up tests. Results: After training, the experimental group showed significantly more interest in facial expressions on a test which involved understanding a dialogue. Significant differences were not found for the other tests used. Conclusions: This outcome suggests that the training method fostered participants’ awareness of the relevance of facial expressions. (shrink)

When humans are addressing multiple robots with informative speech acts, their cognitive resources are shared between all the participating robot agents. For each moment, the user’s behavior is not only determined by the actions of the robot that they are directly gazing at, but also shaped by the behaviors from all the other robots in the shared environment. We define cooperative behavior as the action performed by the robots that are not capturing the user’s direct attention. In this paper, we (...) are interested in how the human participants adjust and coordinate their own behavioral cues when the robot agents are performing different cooperative gaze behaviors. A novel gaze-contingent platform was designed and implemented. The robots’ behaviors were triggered by the participant’s attentional shifts in real time. Results showed that the human participants were highly sensitive when the robot agents were performing different cooperative gazing behaviors. Keywords: human-robot interaction; multi-robot interaction; multiparty interaction; eye gaze cue; embodied conversational agent. (shrink)

Several gaze contingent studies that used a fixed delay between physical eye movements and a display change documented a dip in the fixation duration distributions (e.g., Blanchard et al. 1984; McConkie et al. 1985; van Diepen et al. 1995). In a study by van Diepen et al. (1995), a moving mask paradigm was employed in which subjects searched line drawings of everyday scenes for non-objects. The appearance of the mask was delayed relative to the end of a saccade (...) (beginning of fixation) by 17, 46, 76 or 121 msec. All fixation duration distributions in the masking conditions exhibited a dip with longer masking delays resulting in the dip occurring at longer fixation durations. In contrast, a no-mask condition did not produce a dip. Similar effects in reading were reported by Blanchard et al. (1984), and McConkie et al. (1985). In both these studies the text was.. (shrink)

The present paradigm involved manipulating the congruency of the perceptual processing during the study and test phases of a recognition memory task. During each trial, a gaze-contingent window was used to limit the stimulus display to a region either inside or outside a 108 square centred on the participant’s point of gaze, constituting the Central and Peripheral viewing modes respectively. The window position changed in real time in concert with changes in gaze position. Four experiments documented (...) better task performance when viewing modes at encoding and retrieval matched than when they mismatched (i.e., perceptual specificity effects). Viewing mode congruency effects were demonstrated with both verbal and non-verbal stimuli. The present research is motivated and discussed in terms of theoretical views proposed in the 1970s including the levels-of-processing framework and the proceduralist viewpoint. In addition, implications for current processing and multiple systems views of memory are outlined. (shrink)

One of the dominant behavioral markers of visual-expert search strategy, Holistic Visual Processing (HVP), suggests that experts process information from a larger region of space in conjunction with a more focused gaze pattern in order to improve search speed and accuracy. To date, extant literature suggests that visual search expertise is domain specific, including HVP and its associated behaviors. The current study is the first to use eye tracking to directly measure the HVP strategies of two expert groups, radiologists (...) and architects, in comparison to one another and a novice control. In doing so, we replicated and extended this prior research: visual expertise is domain specific. However, our eye tracking data indicate that contrary to this prior work, HVP strategies are transferable across domains. Yet, despite the transfer of HVP strategies, there is neither reduced search time nor greater accuracy in visual search outside of an expert’s domain. Therefore, our data suggest that HVP behaviors are a particular form of visual search mechanism that, outside of an expert’s native search-ecology, are not necessarily conducive to more general visual search success. It is in addition to explicit knowledge of an expert’s domain, how to search, and where to search, that HVP strategies are their most effective for visual search success. (shrink)

Salience of Peripheral 2 Abstract The three experiments reported document a slowing of peripheral target acquisition associated with the presence of a gaze-contingent window. This window effect was shown for displays using either moving video or still images. The window effect was similar across a resolutiondefined window condition and a luminance-defined window condition suggesting that peripheral image degradation is not a prerequisite of this effect. The window effect was also unaffected by the type of window boundary used (sharp (...) or blended). These results are interpreted in terms of an attentional bias resulting in a reduced saliency of peripheral targets due to increased competition from items within the window. We discuss the implications of the window effect for investigating the perceptual processes involved in natural scenes and for gaze-contingent multiresolutional displays (GCMRDs) that have been proposed to solve the processing and bandwidth bottleneck in many single-user displays, by dynamically placing high-resolution in a window at the center of gaze, with lower resolution everywhere else. (shrink)

Reingold, Reichle, Glaholt, and Sheridan reported a gaze-contingent eye-movement experiment in which survival-curve analyses were used to examine the effects of word frequency, the availability of parafoveal preview, and initial fixation location on the time course of lexical processing. The key results of these analyses suggest that lexical processing begins very rapidly and is supported by substantial parafoveal processing. Because it is not immediately obvious that these results are congruent with the theoretical assumption that words are processed and (...) identified in a strictly serial manner, we attempted to simulate the experiment using the E-Z Reader model of eye-movement control. These simulations were largely consistent with the empirical results, suggesting that parafoveal processing does play an important functional role by allowing lexical processing to occur rapidly enough to mediate direct control over when the eyes move during reading. (shrink)

Frantz Fanon offers a lucid account of his entrance into the white world where the weightiness of the ‘white gaze’ nearly crushed him. In chapter five of Black Skins, White Masks, he develops his historico-racial and epidermal racial schemata as correctives to Merleau-Ponty’s overly inclusive corporeal schema. Experientially aware of the reality of socially constructed (racialized) subjectivities, Fanon uses his schemata to explain the creation, maintenance, and eventual rigidification of white-scripted ‘blackness’. Through a re-telling of his own experiences of (...) racism, Fanon is able to show how a black person in a racialized context eventually internalizes the ‘white gaze’. In this essay I bring Fanon’s insights into conversation with Foucault’s discussion of panoptic surveillance. Although the internalization of the white narrative creates a situation in which external constraints are no longer needed, Fanon highlights both the historical contingency of ‘blackness’ and the ways in which the oppressed can re-narrate their subjectivities. Lastly, I discuss Fanon’s historically attuned ‘new humanism’, once again engaging Fanon and Foucault as dialogue partners. (shrink)

This study asserts that W.V.O. Quine’s eliminative philosophical gaze into mereological composition affects inevitably his interpretations of composition theories of ontology. To investigate Quine’s property monism from the account of modal eliminativism, I applied to his solution for the paradoxes of de re modalities’ . Because of its vital role to figure out how dispositions are encountered by Quine, it was significantly noted that the realm of de re modalities doesn’t include contingent and impossible inferences about things. Therefore, (...) for him, all the intrinsic forces and elements of entities such as powers and causal or teleological dispositions for ontology demand to be seen necessarily as bound variables from a monist perspective. Although his denial of analyticity and the elimination of dispositional field of ontology, S. Mumford criticizes the monist perspective of Quine’s paradoxical approach to superveniences. Because superveniences create problems while determining type-type identities from a monist mereological perspective. It is observed that Quine faces with a reduction again in terms of his dispositional monism despite his critiques to repulse vagueness from the ontology in his well-known article Two Dogmas of Empiricism. -/- . (shrink)

PurposeTo explore and describe a trained communication partner’s use of responsive strategies in dyadic interaction with adults with Rett syndrome.IntroductionResponsive partner strategies facilitate social, communicative, and linguistic development. The common feature is that the communication partner responds contingently to the other’s focus of attention and interprets their acts as communicative. Research on responsive partner strategies that involves individuals with significant communication and motor disabilities remains sparse. The same applies to if, and how, the use of communication aids impacts on the (...) partner’s use of responsive strategies.Materials and methodsA therapist, trained in responsive partner strategies and aided communication interacted during 14 sessions with each of three participants. The participants were adults with Rett syndrome. A gaze-controlled device and responsive strategies were used during all sessions. The Responsive Augmentative and Alternative Communication Style scale was used to assess the partner’s responsiveness. RAACS consists of 11 items including ratings of to what extent the partner is being attentive to, confirms, and expands the individual’s communication. During eight of the 14 sessions, aided AAC Modelling was also used, i.e., the communication partner pointed at symbols on the gaze-controlled device while interacting. In addition to RAACS, each time the communication partner confirmed or expanded on communication when the participants used the gaze-controlled device and the participants did not use the gaze-controlled device was counted. Descriptive statistics were used to present the results. Non-parametric tests were used to compare means between the two conditions and between participants.ResultsInter-rater agreement for the different RAACS items ranged from 0.73 to 0.96 and was thus found to be fair to excellent. The communication partner’s use of responsive strategies varied when communicating with different participants and the scores were higher when aided AAC modeling was used. The communication partner’s number of responses and use of responsive strategies were higher when the participants communicated through a gaze-controlled device.ConclusionThe communication partner’s use of responsive and scaffolding strategies is not a fixed construct but varies in interactions with different non-speaking persons. The same is true whether the non-speaking person uses a gaze-controlled device with digitized speech or not. (shrink)

This address focuses on those of us engaged in viewing science, particularly philosophers and sociologists of science. I begin with a historical perspective on the philosophy of science, focusing on the historical contingencies which have shaped its development since the 1930s. I then turn my gaze to the more recent history of the sociology of science. For both disciplines I hold up to view the reflexive problem of the status of that discipline's claims from its own perspective. I conclude (...) with a realist vision of science which rejects asymmetric notions, such as rationality, in favor of a naturalistic, perspectival realism. (shrink)

Meetings differ from ordinary conversation in that they have an agenda that specifies in advance the topics to be addressed during the meeting. However, the introduction of these topics needs to be locally accomplished and recognized by the participants as agenda items. This article presents some characteristic practices used for introducing agenda-based topics. It shows that they rely on the known-in-advance status of the items, and are presented by the chair as unilateral announcements. They exploit and invoke the written agenda (...) in several ways. The announcements are often short phrasal constructions, just citing the written title of the agenda point. Furthermore, a gaze down at the written document is used as a public display that the introduction is related to the agenda. In contrast to this practice of introducing agenda items, topics not specified by the agenda are introduced by suggestions and questions that present the introduction as contingent on acceptance by the co-participants. The analysis sheds light on the ways in which institutional talk-in-interaction is permeated by the formulations and logic of written documents. (shrink)

A generation ago scientific ideas floated free in the air, as historians gazed up at them in wonder and admiration. From time to time, historians agreed, the ideas that made up the body of scientific truth became incarnate: they were embedded into the fleshly forms of human culture and attached to particular times and places. How this incarnation occurred was a great mystery. How could spirit be made flesh? How did the transcendent and the timeless enter the forms of the (...) mundane and the contingent? Platonist and providentialist perspectives offered ways of speaking about the mystery, but, in general, it remained unresolved at the core of orthodox idealist historiography.1. (shrink)

In this paper I develop a phenomenology of falling ill by presenting, interpreting and developing the basic model we find in Jean-Paul Sartre's Being and Nothingness. The three steps identified by Sartre in this process are analysed, developed further and brought to a five- step model: pre-reflective experience of discomfort, lived, bodily discomfort, suffered illness, disease pondering, and disease state. To fall ill is to fall victim to a gradual process of alienation, and with each step this alienating process is (...) taken to a new qualitative level. Consequently, the five steps of falling ill have not only a contingent chronological order but also a kind of logical order, in that they typically presuppose each other. I adopt Sartre's focus on embodiment as the core ground of the alienation process, but point out that the alienation of the body in illness is not only the experience of a psychic object, but an experience of the independent life of one's own body. This facticity of the body is the result neither of the gaze of the other person, nor of a reflection adopting the outer perspective of the other in an indirect way, but is a result of the very otherness of one's own body, which addresses and plagues us when we fall ill. I use examples of falling ill and being a patient to show how a phenomenology of falling ill can be helpful in educating health-care personnel about the ways of the lived body. (shrink)

This book interrogates the relation between film spectatorship and film theory in order to criticise some of the disciplinary and authoritarian assumptions of 1970s apparatus theory, without dismissing its core political concerns. Theory, in this perspective, should not be seen as a practice distinct from spectatorship but rather as an integral aspect of the spectator’s gaze. Combining Jacques Rancière’s emancipated spectator with Judith Butler’s queer theory of subjectivity, Spectatorship and Film Theory foregrounds the contingent, embodied and dialogic aspects (...) of our experience of film. Erratic and always a step beyond the grasp of disciplinary discourse, this singular work rejects the notion of the spectator as a fixed position, and instead presents it as a field of tensions—a “wayward” history of encounters. (shrink)

This article explores the ethical implications of the dialectics between the human being’s visibility and invisibility by means of a phenomenological approach: In what ways can ›human dignity‹ be experienced, and to what extent does it, as a normative notion, transcend its possible givenness to experience? While there is a consensus that the requirement of respect is implied in this notion, it is controversial how this requirement is realized and fulfilled. Kierkegaard’s ethics of loving vision and Sartre’s description of the (...) objectifying gaze inform a discussion of the feeling of shame: can it protect the dignity of the other person? The following three levels of argumentation will be taken into account: An exchange of glances denoting reciprocal recognition can, on the level of factuality, count as the condition for the subjective constitution of human dignity insofar as it can be experienced in actual contexts of interaction. In a legal context, the constitutional principle of all people’s invisible, inviolable dignity, which is the source of their rights and deserves protection regardless of people’s characteristics and behavior, must be defended against the idea that human dignity is nothing but a contingent, self-posited norm or gradual attribute. The theological dimension of human dignity is considered in regard to its non-empirical ground and destination and to the question of whether human dignity persists post mortem. (shrink)

Sensitivity to interpersonal timing was assessed in mother–infant interaction. In Study 1, 3-month-old infants interacted with their mothers over television and the mothers’ audio-visual presentation was either live or temporally delayed by 1 second. Infants gazed longer when the mother was presented live compared to delayed by 1 second, indicating that they detected the temporal delay. In Study 2, mothers interacted with their 3-month-old infants over television and the infants’ audio-visual presentation was either live or temporally delayed by 1 second. (...) Mothers’ behavior was not altered by a 1-second delay in their infants’ behavior compared to a live presentation. In Study 3 and 4, the results were replicated with 6-month-old infants. Whereas infants detected the temporal delay in maternal responses, mothers likely adjusted to the delay in infant behavior. The discussion focuses on the role of interpersonal timing for detecting social contingency in dyadic and triadic communication. (shrink)

This article studies a link between perception and politics by seeking, in Merleau-Ponty’s work, something like a “mirror relation” in the domains of encounters of love and politics. While in Phenomenology of Perception the analysis of sexuality seemingly renders love impossible, in the courses on Institution, Merleau-Ponty affirms the possibility of love by characterizing it as an institution, a sensible idea, a “mirror relation”. When the lover demands signs of love from the loved one, he demands to see in the (...) eyes, the voice, and the experience of the other his own reflection, the reflection of his experience, his words, his gestures, and the demand of love that he is formulating. The promise of love is thus an institution of sense which sheds a new light on all actions past and future, it is a way of overcoming contingency. Conceiving of politics as a “mirror relation” thus means adopting a careful philosophy that observes the event like a mirror and gives place to sensible ideas, at the intersection of gazes understood as a “type of reflection”. (shrink)

Cattle fair arenas are panopticon-like spaces that are instrumental in dissecting the cow's body into functional parts or traits. The arena aestheticizes a partitioning gaze that is codified in a marking system: the "linear evaluation protocol" for milk cows. The positioning of the nonhuman animal body into a highly artificial context allows one to view the cow as a self-standing object, ready to be partitioned. The exhibition space of the cattle fair and the surveying eye of the cattle fair (...) judge aim to recreate a laboratory space within the relatively "artisanal" and approximate context of the breeding practice. However, there are several limitations, down sides, and contingencies that contrast the project of standardization of the skilled practice of breeding. (shrink)

It is well known that Emmanuel Levinas places the ‘other’ at the heart of his phenomenology, as an agency the relation toward which constitutes subjectivity. As such, the Levinasian other is deprived of violence, and it is identified with the figures of the foreigner, the orphan, and the widow. The only resistance the other could muster against the violence directed at him/ her, argues Levinas, is what he terms as the resistance of lack of resistance. This article aims at questioning (...) this premise. Is the other indeed deprived of any violence? The readings of Derrida, Sartre, Foucault, Agamben, Freud, and Lacan can prove otherwise: either the other is equipped with contingent violence, in accordance with its intentions, as Derrida argues; or it is equipped with a priori violence, administered through the gaze, as Sartre shows. The violence of the other is linked to the violence of identity, as that which alienates the self from itself by depriving it of its fluctuating heterogeneity, whatever name it assumes. (shrink)

The compatibility of divine providence with the contingency of human freedom is widely-debated within medieval thought. Following recent works on the Islamicphilosopher Averroes, this essay expands the issue of causal indeterminism to include the less disputed question of contingency in the larger framework of chance. In tradition of Latin Averroism, Siger of Brabant provides a unique and heterodox perspective on the compatibility of chance with providence. Unlike his fellow scholastics who attempt to preserve contingency under the watchful gaze of (...) divine providence, Siger rejects such moves as destructive of contingency. He instead argues for restrictions on the determination of such events by the arche of divine providence, thus leaving them anarchic with respect to its order but capable of introducing new beginnings in the otherwise closed universe of causes. (shrink)

Inattentional Blindness occurs when observers engaged in resource-consuming tasks fail to see unexpected stimuli that appear in their visual field. Eye movements were recorded in a dynamic IB task where participants tracked targets amongst distractors. During the task, an unexpected stimulus crossed the screen for several seconds. Individuals who failed to report the unexpected stimulus were deemed to be IB. Being IB was associated with making more fixations and longer gaze times on distractor stimuli, being less likely to fixate (...) the unexpected stimulus, and having lower working memory capacity than those who were not IB. Noticing the unexpected stimulus was not contingent upon fixating it, suggesting that some individuals processed the unexpected stimulus via covert attention. The findings support earlier research on working memory and IB. In addition, IBs were less efficient attentional allocators than those who were not IB, as reflected in their eye tracking of irrelevant distractors. (shrink)

In this paper I develop a phenomenology of falling ill by presenting, interpreting and developing the basic model we find in Jean-Paul Sartre’s Being and Nothingness ( 1956 ). The three steps identified by Sartre in this process are analysed, developed further and brought to a five-step model: (1) pre-reflective experience of discomfort, (2) lived, bodily discomfort, (3) suffered illness, (4) disease pondering, and (5) disease state. To fall ill is to fall victim to a gradual process of alienation, and (...) with each step this alienating process is taken to a new qualitative level. Consequently, the five steps of falling ill have not only a contingent chronological order but also a kind of logical order, in that they typically presuppose each other. I adopt Sartre’s focus on embodiment as the core ground of the alienation process, but point out that the alienation of the body in illness is not only the experience of a psychic object, but an experience of the independent life of one’s own body. This facticity of the body is the result neither of the gaze of the other person, nor of a reflection adopting the outer perspective of the other in an indirect way, but is a result of the very otherness of one’s own body, which addresses and plagues us when we fall ill. I use examples of falling ill and being a patient to show how a phenomenology of falling ill can be helpful in educating health-care personnel (and perhaps also patients) about the ways of the lived body. (shrink)

This chapter provides a short history of the reception of Liang Shuming’s thought in European-language scholarship since 1922. By reviewing a significant number of monographs, edited volumes, and articles published in academic and missionary journals in English, French, and German during the last one hundred years, the chapter aims to provide a historical typology of the multifaceted reception of Liang’s thought through time. In the scholarship reviewed, Liang is variously portrayed as a philosopher, a social reformer or activist, a religious (...) thinker, an educator, a legal thinker, and a political figure. Throughout the years, Liang has been described as a conservative, a restorationist, a fundamentalist, and a modern thinker, and has been labeled a Confucian, a Buddhist, and a populist. The many faces of Liang Shuming laid bare by this short history are revealing of the complexity and tensions of the man and his thought, but also of the interpreters’ gaze and the historical evolution of the academic field in the Euro-American region. The end result is a genealogy of sort—one that challenges some deep-seated assumptions about Liang by tracing them back to a particular and contingent historical moment and by situating them within a broad spectrum of alternative positions vying for attention in the small but diverse discursive space allotted to the thought of Liang Shuming in European-language scholarship. (shrink)

Cognitive Reserve, according to a recent consensus definition of the NIH-funded Reserve and Resilience collaboratory,1 is constituted by any mechanism contributing to cognitive performance beyond, or interacting with, brain structure in the widest sense. To identity multivariate activation patterns fulfilling this postulate, we investigated a verbal Sternberg fMRI task and imaged 181 people with age coverage in the ranges 20–30 and 55–70. Beyond task performance, participants were characterized in terms of demographics, and neuropsychological assessments of vocabulary, episodic memory, perceptual speed, (...) and abstract fluid reasoning. Participants studied an array of either one, three, or six upper-case letters for 3 s, then a blank fixation screen was presented for 7 s, to be probed with a lower-case letter to which they responded with a differential button press whether the letter was part of the studied array or not. We focused on identifying maintenance-related activation patterns showing memory load increases in pattern score on an individual participant level for both age groups. We found such a pattern that increased with memory load for all but one person in the young participants, and such a pattern for all participants in the older group. Both patterns showed broad topographic similarities; however, relationships to task performance and neuropsychological characteristics were markedly different and point to individual differences in Cognitive Reserve. Beyond the derivation of group-level activation patterns, we also investigated the inter-subject spatial similarity of individual working memory rehearsal patterns in the older participants’ group as a function of neuropsychological and task performance, education, and mean cortical thickness. Higher task accuracy and neuropsychological function was reliably associated with higher inter-subject similarity of individual-level activation patterns in older participants. (shrink)

In this work we consider the problem of the approximate hedging of a contingent claim in the minimum mean square deviation criterion. A theorem on martingale representation in case of discrete time and an application of the result for semi-continuous market model are also given.

This paper establishes that the occasional identity relation and the contingent identity relation are both non-transitive and as such are not properly classified as identity relations. This is achieved by appealing to cases where multiple fissions and fusions occur simultaneously. These cases show that the contingent and occasional identity relations do not even satisfy the time-indexed and world-indexed versions of the transitivity requirement and hence are non-transitive relations.

This paper raises a challenge to Jonathan Schaffer's priority monism. I contend that monism may be true at the actual world but fail to hold as a matter of metaphysical necessity, contrary to Schaffer's view that monism, if true, is necessarily true. My argument challenges Schaffer for his reliance on contingent physical truths in an argument for a metaphysically necessary conclusion. A counterexample in which the actual laws of physics hold but the physical history of the universe is different (...) shows that priority monism is contingently true at best. I suggest some general lessons for discussion of metaphysical dependence. (shrink)

It is common to think that grounding is necessary in the sense that: if P grounds Q, then necessarily: if P, then Q. Though most accept this principle, some give counterexamples to it. Instead of straightforwardly arguing for, or against, necessity, I explain the sense in which grounding is necessary and contingent. I argue that there are two kinds of grounding: what-grounding and why-grounding, where the former kind is necessary while the latter is contingent.

Anti-racist debate today remains polarised between ‘class reductionist’ (any attempt to address racial disparities reinforces capitalist class relations) and ‘liberal identity’ (disparities in racial representation can be resolved without questioning class inequality) politics. Both positions share a common perspective – racial oppression and class exploitation are the products of distinctive social dynamics whose relationship is historically contingent. This essay is an initial step toward characterising a structurally necessary relationship between capitalism and racial oppression. The essay draws upon Anwar Shaikh (...) and Howard Botwinick’s elaboration of Marx’s political economy, and Ellen Wood’s analysis of the specificity of capitalist imperialism. (shrink)

ABSTRACTThe Centre for Social Ontology working group project has been exploring the concept of a Morphogenic Society since 2013. The project is now drawing to a close. One of the arising issues from the project has been whether such a society can be and is liable to be one of human flourishing. In this short paper, I explore one possible aspect of the concept of a Morphogenic Society.1 A Morphogenic Society may involve issues of ‘contingent necessity’. Contingent necessity (...) may provide one way to think about human flourishing, and this in turn may highlight the potential significance of the concept of a Morphogenic Society as a resource in positional argument for human flourishing. (shrink)

A well-known objection to divine simplicity holds that the doctrine is incompatible with God’s contingent knowledge. I set out the objection and reject two problematic solutions. I then argue that the objection is best answered by adopting an “extrinsic model of divine knowing” according to which God’s contingent knowledge, which varies across worlds, does not involve any intrinsic variation in God. Solutions along these lines have been suggested by others. This paper advances the discussion by developing and offering (...) partial defenses of three such models. (shrink)