This article addresses the data protection and product safety regulatory models currently applied to consumer-facing health technologies. It explains how the design and structures of existing data protection and safety regulation in the U.S. have resulted in exceptionally thin protection for the users of consumer-facing devices and products that rely on or that facilitate consumer collection or aggregation of health and wellness data. It also examines some appealing legislative alternatives to the current thin model used in the U.S. and suggests (...) a framework for prioritizing ameliorative regulation. To better understand existing regulatory models, their deficiencies, and how they should be reformed, the article employs an analytical model describing these regulatory systems across two axes. The vertical axis describes the quantity or depth of regulation, such as, for example, the strictness of the rules imposed by the regulatory model. The horizontal axis describes the reach of the regulation, the behaviors, products, or industries to which the regulation applies. (shrink)

This paper offers a framework for consciousness of internal reality. Recent PET experiments are reviewed, showing partial overlap of cortical activation during self-produced actions and actions observed from other people. This overlap suggests that representations for actions may be shared by several individuals, a situation which creates a potential problem for correctly attributing an action to its agent. The neural conditions for correct agency judgments are thus assigned a key role in self/other distinction and self-consciousness. A series of behavioral experiments (...) that demonstrate, in normal subjects, the poor monitoring of action-related signals and the difficulty in recognizing self-produced actions are described. In patients presenting delusions, this difficulty dramatically increases and actions become systematically misattributed. These results point to schizophrenia and related disorders as a paradigmatic alteration of a ''Who?'' system for self-consciousness. (shrink)

Research seeking a scientific foundation for the theory of art appreciation has raised controversies at the intersection of the social and cognitive sciences. Though equally relevant to a scientific inquiry into art appreciation, psychological and historical approaches to art developed independently and lack a common core of theoretical principles. Historicists argue that psychological and brain sciences ignore the fact that artworks are artifacts produced and appreciated in the context of unique historical situations and artistic intentions. After revealing flaws in the (...) psychological approach, we introduce a psycho-historical framework for the science of art appreciation. This framework demonstrates that a science of art appreciation must investigate how appreciators process causal and historical information to classify and explain their psychological responses to art. Expanding on research about the cognition of artifacts, we identify three modes of appreciation: basic exposure to an artwork, the artistic design stance, and artistic understanding. The artistic design stance, a requisite for artistic understanding, is an attitude whereby appreciators develop their sensitivity to art-historical contexts by means of inquiries into the making, authorship, and functions of artworks. We defend and illustrate the psycho-historical framework with an analysis of existing studies on art appreciation in empirical aesthetics. Finally, we argue that the fluency theory of aesthetic pleasure can be amended to meet the requirements of the framework. We conclude that scientists can tackle fundamental questions about the nature and appreciation of art within the psycho-historical framework. (shrink)

Trente et un penseurs, parmi lesquels Jacques Derrida, Françoise Héritier, Edgar Morin, Jean-Luc Nancy, Michel Onfray ou encore Jacques Rancière, pour comprendre les errements et les raisons d'espérer d'une planète convulsée. Dix-neuf entretiens et débats avec les intellectuels les plus engagés dans la réflexion sur le temps présent dressent un état des lieux des questions qui taraudent notre modernité. Issu du Théâtre des idées, cycle de rencontres intellectuelles du Festival d'Avignon (2004-2012), ces dialogues singuliers s'attachent à faire vivre l'esprit critique, (...) cette faculté de juger, de soumettre la réalité sociale, artistique ou politique au tamis du jugement argumenté, qu'il soit sérieux ou ironique, virulent ou tempéré. De très actuelles "résistances intellectuelles" qui esquissent ce que pourrait être un service public des idées, c'est-à-dire un accès direct, libre et partagé à l'intellectualité. (shrink)

Dans ce livre, Malebranche expose sa philosophie à travers des entretiens avec un philosophe, un janséniste et un mandarin chinois. Il explore les différentes dimensions de la métaphysique, de la religion et de la mort et cherche à répondre aux questions fondamentales de l'existence. Tout étudiant en philosophie trouvera ce livre intéressant et instructif. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is (...) in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. (shrink)

In a 1993 paper, I argued that empirical treatments of the epistemologyused by scientists in experimental work are too abstract in practice tocounter relativist efforts to explain the outcome of scientificcontroversies by reference to sociological forces. This was because, atthe rarefied level at which the methodology of scientists is treated byphilosophers, multiple mutually inconsistent instantiations of theprinciples described by philosophers are employed by contestingscientists. These multiple construals change within a scientificcommunity over short time frames, and these different versions ofscientific methodology (...) can determine the outcome of a controversy. Iillustrated with a comparatively detailed analysis of the methodologyused by biologists debating the existence of an entity called thebacterial mesosome between the mid-1950s and the mid-1970s. This 1993piece has drawn several critiques in the philosophical literature. Inthis present piece I respond to these critiques and argue that they failto address the core argument of the original paper, and I reflectfurther on the methodologies of philosophers of science pursuingempirical or `naturalistic' epistemology. (shrink)

What has become generally known as the Berlin School of Logical Empiricism constitutes a philosophical movement that was erected on foundations laid by Albert Einstein. His revolutionary work in physics had a profound impact on philosophers interested in scientific issues, prominent among them Paul Oppenheim and Hans Reichenbach, the founding fathers of the school, who joined in viewing him as their hero among philosopher-scientists. Overall the membership of this school falls into three groups. The founding generation was linked by the (...) circumstance that both Grelling and Reichenbach were collaborators of Oppenheim; the middle generation by the fact that both Hempel and Helmer were students of Reichenbach's in Berlin; and the younger generation by the fact that all of its members were students and disciples either of Reichenbach's or of Hempel's in the USA. Three stages are at issue: an initial phase in Berlin, a transatlantic migration, and a continuation in the U.S.A.--principally in Pittsburgh. (shrink)

Policy-makers face an uncertain world. One way of getting a handle on decision-making in such an environment is to rely on evidence. Despite the recent increase in post-fact figures in politics, evidence-based policymaking takes centre stage in policy-setting institutions. Often, however, policy-makers face large volumes of evidence from different sources. Robustness analysis can, prima facie, handle this evidential diversity. Roughly, a hypothesis is supported by robust evidence if the different evidential sources are in agreement. In this thesis, I strengthen the (...) case for the use of robustness analysis in evidence-based policymaking by answering open research questions about this inference technique. First, I argue that existing taxonomies miss a fruitful category of robustness reasoning, that is predictive stability. Second, I claim that derivational robustness analysis – the investigation of whether the results of different models are in agreement – can yield interesting insights even if not the entire relevant model space is covered by available models or if the model results are only partially in agreement. Third, I claim that expert knowledge is necessary to address questions that arise when one applies measurement robustness analysis – the investigation into whether multiple means of measurement yield the same result. Finally, I argue that, in situations where evidence from different measurements is not in agreement, it can be advisable to no longer take all of the evidence into account. This can be done in a rationally defensible way by choosing the most adequate theory or model underlying parts of the evidence set. I discuss examples from climate, medical, and economic policy-making to establish my claims. (shrink)

How might a human communication system be bootstrapped in the absence of conventional language? We argue that motivated signs play an important role (i.e., signs that are linked to meaning by structural resemblance or by natural association). An experimental study is then reported in which participants try to communicate a range of pre-specified items to a partner using repeated non-linguistic vocalization, repeated gesture, or repeated non-linguistic vocalization plus gesture (but without using their existing language system). Gesture proved more effective (measured (...) by communication success) and more efficient (measured by the time taken to communicate) than non-linguistic vocalization across a range of item categories (emotion, object, and action). Combining gesture and vocalization did not improve performance beyond gesture alone. We experimentally demonstrate that gesture is a more effective means of bootstrapping a human communication system. We argue that gesture outperforms non-linguistic vocalization because it lends itself more naturally to the production of motivated signs. (shrink)

Analyse: Le penseur chinois Wang Chong (27-97?) fut souvent considéré comme un auteur hétérodoxe, voire anti-confucianiste, tant en Chine ancienne qu'au XXe siècle.

This paper develops a new argument against free will, understood as the principle of alternative possibilities (PAP). This principle has been central in debates around free will and moral responsibility; however, it is almost always stated in terms of bodily rather than mental action, and it is therefore mainly understood as the possibility to physically act differently, rather than to think differently. The argument presented here is aimed at the latter, which is termed the possibility of alternative thought (PAT). It (...) argues on psychological grounds that it is impossible for a subject to think differently than it does in a given situation. First, I make the possibility of alternative thought explicit, explain what it means for a self to entertain a thought (or conscious content), and I define a notion of conscious control that is required for the argument. I then offer a taxonomy of content types, based on how they are being controlled. In the third section, I analyse the scenarios of content generation for each type of content, to determine whether they can satisfy the PAT. It will be shown that this cannot be the case. (shrink)

Cet article précise ce que Charles Taylor entend par « idéal moral », et montre que le philosophe défend une position qu’on peut globalement qualifier de « réaliste » du point de vue métaéthique : nos conceptions du bien ont une existence et une efficience propres, et ne peuvent pas être ramenées à de simples réactions instinctives, ni à l’expression de préférences personnelles, ni encore être considérées comme le résultat d’un « choix radical ». J’explique ce que Taylor désigne par (...) les concepts de « subjectivisme », d’« évaluation forte », d’« horizon de signification » et d’« identité », et montre en quoi ces concepts remettent en cause certains aspects des philosophies de Nietzsche et de Sartre. (shrink)

This paper intends to bring Austinian themes into methodological discussion about models. Using Austinian conceptual vocabulary, I argue that models perform actions in and outside of the academic field. This multiplicity of fields induces a variety of felicity conditions and types of performed actions. If for example, an inference from a model is judged according to some epistemological criteria in the scientific field, the representation of the world which the model carries will not be judged by the same criteria outside (...) the scientific field. A model can be considered as a standard in a strict scientific framework, while not being used as part of public policies, or vice versa. However, we focus on the dynamics between different fields. (shrink)

In the past decade, experiments on altruistic punishment have played a central role in the study of the evolution of cooperation. By showing that people are ready to incur a cost to punish cheaters and that punishment help to stabilise cooperation, these experiments have greatly contributed to the rise of group selection theory. However, despite its experimental robustness, it is not clear whether altruistic punishment really exists. Here, I review the anthropological literature and show that hunter-gatherers rarely punish cheaters. Instead, (...) they avoid dealing with them and switch to other partners. I suggest that these data are better explained by individual selection, and in particular by partner choice models, in which individuals are in competition to be recruited by cooperative partners. I discuss two apparent problems for partner choice theories: large-scale cooperation and punishments in economic games. I suggest that rather than favouring group selection theory, these two phenomena provide evidence in favour of individual selection: (1) people produce large-scale cooperation through institutions in which punishment is not altruistic but rewarded on an individual basis; (2) punishment in experimental games can be explained without altruism and is indeed often better explained by individual interests. (shrink)

We present a new proof of soundness/completeness of tableaux with respect to dialogical games in Classical First-Order Logic. As far as we know it is the first thorough result for dialogical games where finiteness of plays is guaranteed by means of what we call repetition ranks.

Based on anthropological fieldwork on the revival of hallucinogen research as well as on the epistemic culture of neurophilosophy, this Common Knowledge guest column examines two very different philosophical engagements with psychedelic drugs. In Thomas Metzinger's evidence-based philosophy of mind, hallucinogens help to operationalize questions about the nature of consciousness. While this project contributes to the great divide between empirically enlightened moderns and tradition-oriented premoderns, Metzinger's neurophilosophical reanimation of the ancient conception of philosophy as cultura animi can build a bridge (...) to Aldous Huxley's perennial philosophy, which has informed the psychedelic intelligentsia like no other body of thought. In the sixteenth century, the philosophia perennis grew out of a decidedly nonmodern philosophy of religion that sought to suture the historical and cultural cracks that would come to define modernity. This essay argues that neurophilosophy and ethnographic studies of consciousness cultures could function as critical correctives in a contemporary rearticulation of perennial philosophy. (shrink)

This book features 20 essays that explore how Latin medieval philosophers and theologians from Anselm to Buridan conceived of habitus, as well as detailed studies of the use of the concept by Augustine and of the reception of the medieval doctrines of habitus in Suàrez and Descartes. Habitus are defined as stable dispositions to act or think in a certain way. This definition was passed down to the medieval thinkers from Aristotle and, to a lesser extent, Augustine, and played a (...) key role in many of the philosophical and theological developments of the time. Written by leading experts in medieval and modern philosophy, the book offers a historical overview that examines the topic in light of recent advances in medieval cognitive psychology and medieval moral theory. Coverage includes such topics as the metaphysics of the soul, the definition of virtue and vice, and the epistemology of self-knowledge. The book also contains an introduction that is the first attempt at a comprehensive survey of the nature and function of habitus in medieval thought. The material will appeal to a wide audience of historians of philosophy and contemporary philosophers. It is relevant as much to the historian of ancient philosophy who wants to track the historical reception of Aristotelian ideas as it is to historians of modern philosophy who would like to study the progressive disappearance of the term “habitus” in the early modern period and the concepts that were substituted for it. In addition, the volume will also be of interest to contemporary philosophers open to historical perspectives in order to renew current trends in cognitive psychology, virtue epistemology, and virtue ethics. (shrink)

Se plantea la cuestión del papel de la armonía en la concepción de la racionalidad de Leibniz. Se sitúa esta noción en el marco de la metafísica de la individualidad sistémica, y aparece en dos lugares concretos. En primer lugar en el eje categorial uniformidad-diversi­dad, como principio de equilibrio entre ambos polos. Y en segundo lugar, aparece la noción de armonía en el nivel último de la racionalidad, concretamente en plano de la lógica de los principios. Este nivel se rige (...) por el principio general del orden, y precisamente este principio es explicado por Leibniz frecuentemente en relación con la armonía. (shrink)

Para calificar la estética posmodernista, que responde a la entrada en la era posmoderna, marcada por la ausencia de una visión unitaria y global del mundo, los teóricos de los años 70 privilegiaron el concepto de “heterogeneidad”, que en la década siguiente y parte de los años 90, dejó paso al de “sincretismo”, “mestizaje” o “creolidad”. A partir de los años 90 y, sobre todo, desde la primera década del tercer milenio, el concepto de “hibridez” ocupa un lugar destacado debido, (...) en parte, a la influencia de los estudios poscoloniales. Uno de los primeros en utilizar dicho concepto, en 1990, fue el crítico cultural argentino Néstor García Canclini, pero no profundizó sobre la hibridez de las obras literarias. Por consiguiente, cabe definir, en primer lugar, esta noción proteiforme, utilizada en nuestros días en numerosos campos. (shrink)

Artificial intelligence and robots may progressively take a more and more prominent place in our daily environment. Interestingly, in the study of how humans perceive these artificial entities, science has mainly taken an anthropocentric perspective (i.e., how distant from humans are these agents). Considering people’s fears and expectations from robots and artificial intelligence, they tend to be simultaneously afraid and allured to them, much as they would be to the conceptualisations related to the divine entities (e.g., gods). In two experiments, (...) we investigated the proximity of representation between artificial entities (i.e., artificial intelligence and robots), divine entities and natural entities (i.e., humans and other animals) at both an explicit (Study 1) and an implicit level (Study 2). In the first study, participants evaluated these entities explicitly on positive and negative attitudes. Hierarchical clustering analysis showed that participants’ representation of artificial intelligence, robots and divine entities were similar, while the representation of humans tended to be associated with that of animals. In the second study, participants carried out a word/non-word decision task including religious semantic-related words and neutral words after the presentation of a masked prime referring to divine entities, artificial entities and natural entities (or a control prime). Results showed that after divine and artificial entity primes, participants were faster to identify religious words as words compared to neutral words arguing for a semantic activation. We conclude that people make sense of the new entities by relying on already familiar entities and in the case of artificial intelligence and robots, people appear to draw parallels to divine entities. (shrink)

We construct a fibered dimension function in some topological differential fields.

Synaesthesia is a heterogeneous phenomenon, even when considering one particular sub-type. The purpose of this study was to design a reliable and valid questionnaire for grapheme-colour synaesthesia that captures this heterogeneity. By the means of a large sample of 628 synaesthetes and a factor analysis, we created the Coloured Letters and Numbers questionnaire with 16 items loading on 4 different factors . These factors were externally validated with tests which are widely used in the field of synaesthesia research. The questionnaire (...) showed good test–retest reliability and construct validity . Our findings are discussed in the light of current theories and new ideas in synaesthesia research. More generally, the questionnaire is a useful tool which can be widely used in synaesthesia research to reveal the influence of individual differences on various performance measures and will be useful in generating new hypotheses. (shrink)

Henrich et al.’s article fleshes out in a very useful and timely manner comments often heard but rarely published about the extraordinary cultural imbalance in the recruitment of participants in psychology experiments and the doubt this casts on generalization of findings from these “weird” samples to humans in general. The authors mention that one of the concerns they have met in defending their views has been of a methodological nature: “the observed variation across populations may be due to various methodological (...) artifacts that arise from translating experiments across contexts” (sect. 7.2, para. 1). Here we want to express a less sweeping methodological concern. While accepting the general conclusions and recommendations of the article, we believe they should be complemented with a.. (shrink)

Même si l’on connaît surtout Ecce homo, l’une de ses dernières œuvres, dans laquelle Nietzsche nous livre une véritable autobiographie intellectuelle, le philosophe allemand s’est en réalité très tôt plu à la pratique de l’autobiographie. L’autoréflexion qu’il présente de son devenir fut ensuite une constante, notamment dans les Préfaces qu’il ajouta par la suite à ses plus fameux ouvrages. Mais cette constante est d’autant plus étonnante chez un auteur qui dit d’une part ne s’être jamais que médiocrement réfléchi, et d’autre (...) part qu’il ne faut pas soupçonner le moins du monde qui l’on est pour être en mesure de devenir soi. Nous tâchons ici de dépasser cette contradiction apparente en proposant une interprétation de ce geste nietzschéen de l’autobiographie et nous nous demandons en même temps si cette pratique ne constitue et ne construit pas davantage le soi à un moment donné, peut-être même à titre d’illusion, plutôt qu’elle ne le saisit véritablement. (shrink)

Punitive behaviours are often assumed to be the result of an instinct for punishment. This instinct would have evolved to punish wrongdoers and it would be the evidence that cooperation has evolved by group selection. Here, I propose an alternative theory according to which punishment is a not an adaptation and that there was no specific selective pressure to inflict costs on wrongdoers in the ancestral environment. In this theory, cooperation evolved through partner choice for mutual advantage. In the ancestral (...) environment, individuals were in competition to be recruited in cooperative ventures and it was vital to share the benefits of cooperation in a mutually advantageous manner. If individuals took a bigger share of the benefits, their partners would leave them for more interesting partners. If they took a smaller share, they would be exploited by their partners who would receive more than what they had contributed to produce. This competition led to the selection of a sense of fairness, a cognitive adaptation aiming to share equally the benefits of cooperation in order to attract partners. In this theory, punishment is not necessary for the evolution of cooperation. Punitive behaviours are only a way to restore fairness by compensating the victim or penalizing the culprit. Drawing on behavioural economics, legal anthropology, and cognitive psychology, I show that empirical data fit better with this framework than with the theory of group selection. When people punish, they do so to restore fairness rather than to help the group. (shrink)

Recent models of the conceptual system hold that concepts are grounded in simulations of actual experiences with instances of those concepts in sensory-motor systems (e.g., Barsalou, 1999, 2003; Solomon & Barsalou, 2001). Studies supportive of such a viewhave shown that verifying a property of a concept in one modality, and then switching to verify a property of a different concept in a different modality generates temporal processing costs similar to the cost of switching modalities in perception. In addition to non-emotional (...) concepts, the present experiment investigated switching costs in verifying properties of positive and negative (emotional) concepts. Properties of emotional concepts were taken from vision, audition, and the affective system. Parallel to switching costs in neutral concepts, the study showed that for positive and negative concepts, verifying properties from different modalities produced processing costs such that reaction times were longer and error rates were higher. Importantly, this effect was observed when switching from the affective system to sensory modalities, and vice-versa. These results support the embodied cognition view of emotion in humans. (shrink)

In Study 1, we examined the moderating impact of alexithymia (i.e., a difficulty identifying and describing feelings to other people and an externally oriented cognitive style) on the automatic processing of affective information. The affective priming paradigm was used, and lower priming effects for high alexithymia scorers were observed when congruent (incongruent) pairs involving nonverbal primes (angry face) and verbal target were presented. The results held after controlling for participants' negative affectivity. The same effects were replicated in Studies 2 and (...) 3, with trait anxiety and depression entered as additional covariates. In Study 3, no moderating impact of alexithymia was found for verbal-facial pairs suggesting that the results cannot be merely explained in terms of transcoding limitations for high alexithymia scorers. Overall, the present results suggest that alexithymia could be related to a difficulty in processing and automatically using high arousal emotional information to respond to concomittant behavioural demands. (shrink)

This article examines HIV-positive patients’ experiences of treatments within a context characterized by the multiplicity of opinions expressed both by specialists and the public domain. It is based upon a survey of 63 patients encountered in a Paris hospital. The authors demonstrate the contrasts between these patients in terms of two main dimensions: the degree of the patients’ proximity to specialist knowledge, and the level of homogeneousness that the patients attribute to medical know-how. At the point where these two dimensions (...) meet, the article distinguishes between three forms of patient attitude towards treatment; in other words, three ways of simultaneously positioning oneself with regard to the media, associations, doctors and family circles/entourage: resorting to exteriority; self-integration into biomedical institutions; arranging heterogeneous actors. It analyses the transformations relating to the main experience profiles highlighted by sociological studies of other pathologies. (shrink)

Computer vision aims to produce an understanding of digital image’s content and the generation or transformation of images through software. Today, a significant amount of computer vision algorithms rely on techniques of machine learning which require large amounts of data assembled in collections, or named data sets. To build these data sets a large population of precarious workers label and classify photographs around the clock at high speed. For computers to learn how to see, a scale articulates macro and micro (...) dimensions: the millions of images culled from the internet with the few milliseconds given to the workers to perform a task for which they are paid a few cents. This paper engages in details with the production of this scale and the labour it relies on: its elaboration. This elaboration does not only require hands and retinas, it also crucially zes mobilises the photographic apparatus. To understand the specific character of the scale created by computer vision scientists, the paper compares it with a previous enterprise of scaling, Malraux’sLe Musée Imaginaire, where photography was used as a device to undo the boundaries of the museum’s collection and open it to an unlimited access to the world’s visual production. Drawing on Douglas Crimp’s argument that the “musée imaginaire”, a hyperbole of the museum, relied simultaneously on the active role of the photographic apparatus for its existence and on its negation, the paper identifies a similar problem in computer vision’s understanding of photography. The double dismissal of the role played by the workers and the agency of the photographic apparatus in the elaboration of computer vision foreground the inherent fragility of the edifice of machine vision and a necessary rethinking of its scale. (shrink)

To introduce the issue of the tracking and identification of human agents, I examine the ability of an agent to track a human person and distinguish this target from other individuals: The ability to perform person identification. First, I discuss influential mechanistic models of the perceptual recognition of human faces and people. Such models propose detailed hypotheses about the parts and activities of the mental mechanisms that control the perceptual recognition of persons. However, models based on perceptual recognition are incomplete (...) theories of person identification because they do not explain several identification behaviors that are fundamental to human social interactions. Furthermore, recognition-based models tend to appeal to the controversial concept of the “identity” of a person without explaining what determines personal identity and persistence. To overcome these limitations, I propose to integrate the face-recognition program into a broader causal-historical theory of identification. The causal-historical theory of identification complements models focused on perceptual recognition because it can account for the types of non-perceptual identification overlooked by the face-recognition program. Moreover, it can decompose the identification behaviors into tracking processes that succeed or fail to be sensitive to causal characteristics of a target. I illustrate these advantages with a discussion of the difference between the tracking of a person understood as either a causally continuous biological organism or a psychologically continuous mind. Finally, I argue that the causal-historical theory provides a theoretical framework for investigating the tracking of relations between a target and its contextual and historical attributes, such as a target's possessions. (shrink)

Many scholars view artworks as the products of cultural history and arbitrary institutional conventions. Others construe art as the result of psychological mechanisms internal to the organism. These historical and psychological approaches are often viewed as foes rather than friends. Is it possible to combine these two approaches in a unified analysis of the perception and consciousness of artworks? I defend a positive answer to this question and propose a psycho-historical theory, which argues that artworks are historical and material artefacts (...) designed to prompt mental activities and elicit the conscious experience of aesthetic worlds. My argument suggests that the material components of artworks--termed their `material substrata'--are crucial mediators between historical contexts and the mental activities elicited by the perception of artworks. (shrink)