Standard models of visual perception hold that vision is an inferential or interpretative process. Such models are said to be superior to competing, non-inferential views in explanatory power. In particular, they are said to be capable of explaining a number of otherwise mysterious, visual phenomena such as multi-stable perception. Multi-stable perception paradigmatically occurs in the presence of ambiguous figures, single images that can give rise to two or more distinct percepts. Different interpretations are said to produce the different percepts. In (...) this paper, I argue that a non-inferential account of visual perception is just as capable of explaining multi-stable perception. I propose an embedded understanding of vision, and show how the embedded account can, after properly qualifying them, use the explanatory resources of the inferential view to explain just what such a view explains. (shrink)

Ambiguous figures pose a problem for representationalists, particularly for representationalists who believe that the content of perceptual experience is non-conceptual (MacPherson in Nous 40(1):82–117, 2006). This is because, in viewing ambiguous figures, subjects have perceptual experiences that differ in phenomenal properties without differing in non-conceptual content. In this paper, I argue that ambiguous figures pose no problem for non-conceptual representationalists. I argue that aspect shifts do not presuppose or require the possession of sophisticated conceptual resources and that, although viewing ambiguous (...) figures often causes a change in phenomenal properties, this change is accompanied by a change in non-conceptual content. I illustrate the case by considering specific examples. (shrink)

Philosophers of perception widely agree that sensory properties, like color, are represented in perceptual experience. Arguments are usually needed to establish that something other than sensory properties, for example three-dimensional objects or kind properties, are part of perceptual content. Call the idea that sensory properties are represented in perceptual experience the Sensation View (SV). Given its widespread acceptance, we may expect to find strong reasons for holding SV. In this paper, I argue that we lack such reasons: SV is largely (...) unjustified. We have surprisingly poor justification for thinking that sensory properties are represented in perception. By focusing on the case of vision, I show that an embedded understanding of visual perception, and empirical evidence in cognitive psychology, indicate that SV is far from warranted. (shrink)

Can one see one thing as another without possessing a concept of it? The answer to this question is intuitively negative. This is because seeing x as F is usually taken to consist in the application of the concept F to x . Seeing the duck-rabbit figure as a duck figure, for instance, involves applying the concept DUCK to the figure; thus, one cannot see the figure as the figure of a duck unless one has the concept of a duck (...) and is able to deploy it when looking at the figure. Nearly by definition, then, one cannot see x as F without possessing a concept of F. Contrary to this line of reasoning, this article treats the question of whether we can see x as F without possessing a concept of F as an open and partially empirical question. Seeing x as F involves seeing x in a certain way, namely as F, and whether concepts are required in order to see something in a certain way is an open question. Accordingly, what follows offers a proposal for an alternative way of understanding seeing–as that does not appeal to concept application. (shrink)

Why does the world look to us as it does? As Nico Orlandi argues, it is simply because of how the world is. This answer emerges from understanding vision as situated in a structured environment, and it contrasts with the view that visual perception involves an inference.

It is increasingly common in cognitive science and philosophy of perception to regard perceptual processing as a probabilistic engine, taking into account uncertainty in computing representations of the distal environment. Models of this kind often postulate probabilistic representations, or what we will call probabilistic states,. These are states that in some sense mark or represent information about the probabilities of distal conditions. It has also been argued that perceptual experience itself in some sense represents uncertainty (Morrison _Analytic Philosophy_ 57 (1): (...) 15 48, 2016 ). In this article, we will first consider three models of sensory activity from perceptual neuroscience, namely signal detection theory (SDT), probabilistic population codes (PPC), and sampling. We will then reflect on the sense in which the probabilistic states introduced in these models are probabilistic representations. To sharpen this discussion, we will compare and contrast these probabilistic states to credences as they are understood in epistemology. We will suggest that probabilistic representation, in an appropriately robust sense, can be understood as a form of analog representation. In the last part of the paper, we apply this to the issue of whether conscious experience represents uncertainty—we will interpret this as the claim that there are phenomenal features of experience that serve as analog probabilistic representations. (shrink)

There is a certain excitement in vision science concerning the idea of applying the tools of bayesian decision theory to explain our perceptual capacities. Bayesian models are thought to be needed to explain how the inverse problem of perception is solved, and to rescue a certain constructivist and Kantian way of understanding the perceptual process. Anticlimactically, I argue both that bayesian outlooks do not constitute good solutions to the inverse problem, and that they are not constructivist in nature. In explaining (...) how visual systems derive a single percept from underdetermined stimulation, orthodox versions of bayesian accounts encounter a problem. The problem shows that such accounts need to be grounded in Natural Scene Statistics (NSS), an approach that takes seriously the Gibsonian insight that studying perception involves studying the statistical regularities of the environment in which we are situated. Additionally, I argue that bayesian frameworks postulate structures that hardly rescue a constructivist way of understanding perception. Except for percepts, the posits of bayesian theory are not representational in nature. bayesian perceptual inferences are not genuine inferences. They are biased processes that operate over nonrepresentational states. (shrink)

This article attempts to clarify the commitments of a predictive coding approach to perception. After summarizing predictive coding theory, the article addresses two questions. Is a predictive coding perceptual system also a Bayesian system? Is it a Kantian system? The article shows that the answer to these questions is negative.

This paper questions two prima facie plausible claims concerning switching in the presence of ambiguous figures. The first is the claim that reversing is an instantaneous process. The second is the claim that the ability to reverse demonstrates the interpretive, inferential and constructive nature of visual processing. Empirical studies show that optical and cerebral events related to switching protract in time in a way that clashes with its perceived instantaneity. The studies further suggest an alternative theory of reversing: according to (...) such alternative, seeing the same thing in multiple ways is a matter of uncovering what is already present to the senses through visual search. (shrink)

Cet article aborde l’écriture à partir de la configuration actuelle de l’espace urbain, avec ses ensembles résidentiels sécurisés qui redistribuent et donnent sens à l’espace des villes, en provoquant une raréfaction des pratiques de sociabilité. Partant du principe qu’il est impossible de penser le fonctionnement du langage en le séparant de ses conditions matérielles et de la conjoncture dans laquelle celles-ci surgissent, il analyse le lien entre l’écriture urbaine et la façon dont cet espace de signification s’organise matériellement. L’analyse se (...) fonde sur la pratique des tags à Campinas, au Brésil. L’article aborde également le rapport de la population à l’école en tant que lieu d’institutionnalisation de l’écriture. (shrink)

v. 1. Gnoseologia, psicologia, morale.--v.2. Storia, civiltà, progresso.

We investigated the possible causes of perceptual switching in ambiguous figures. Ambiguous figures are a special class of visual stimuli that can give rise to at least two alternative interpretations. Because the figures themselves stay the same, these stimuli are particularly suitable to study the dynamic changes in our visual apparatus that enable us to see the world in different ways. Recent studies stress the importance of both low-level and high-level processes in switching. We show that these processes lead to (...) switching independently, and that, when they co-occur, they do not occur at exactly the same time.We take these results to indicate that perceptual switching is a radically multiply realizable process, in that various neurological states can instantiate it in a single individual from time to time. We reflect on the consequences of this conclusion for experiential realism, in particular the notion that embodiment misleads us in identifying psychological types. (shrink)

Susanna Schellenberg's book is an ambitious project, providing a view of perception that makes sense of its content, its phenomenology, and its epistemic role. In these comments, I focus on her capacitist view and raise questions concerning this view's ability to offer an adequate account of the content and phenomenology of perceptual and hallucinatory experiences.

My main objective is to clarify the platonic perspective about the narratives which present a allegorical character. The question arises from the fact that the philosopher systematically avoids using the terms????????? and???????????, usually translated as narrative and narrate, to designate the allegories in his works. His refusal is odd, because his use of the terms covers a heterogeneous group of narratives and apparently there is no reason that prevents them from designating the allegorical passages. My proposal for a solution is (...) develop a analysis of the occurrences of????????? and??????????? in corpus platonicum, which aims to promote a more detailed characterization of the meaning of the terms. To understand one of the aspects found in this survey, the concept of testimony, I follow the interpretation of Luc Brisson in his work Platon les mots et les mythes. Finally, based on Brisson's thesis, I try to explain why the philosopher avoids the terms????????? and??????????? to refer to the allegorical narratives. (shrink)

Individuals deceive themselves about a wide variety of subjects. In fortunate circumstances, where those who manage to leave self-deception embrace reality, an interesting phenomenon occurs: the formerly self-deceived often confess to having ‘known [the truth] all along’. These post-self-deception judgments are not conceptually innocuous; if genuine, they call into question the core feature of prominent theories of self-deception, namely that self-deceived individuals do not believe the unwelcome truth. In this paper I argue that post-self-deception judgments do not track a belief, (...) but rather a suspicion of the unwelcome truth. I do this by showing that post-self-deception judgments are themselves instances of self-deception where the individual is self-deceived that they believed the unwelcome truth. I then suggest that the motivational cause of the self-deceit is hindsight bias, specifically the kind known as foreseeability, and that as a result, post-self-deception judgments are not reliable because they do not accurately track previous self-deceptive experiences. (shrink)

Self-control is normally, if only tacitly, viewed as an inherently practical capacity or achievement: as exercised only in the domain of action. Questioning this assumption, we wish to motivate the...

Resumo: Com o fito de compreender as noções de história e juízo político, este artigo pretende mostrar a peculiar interpretação que Hannah Arendt faz da mais conhecida e discutida personalidade filosófica: Sócrates. Assim como outras ideias, tais como a de banalidade do mal, a natureza do terror totalitário e de espaço público, sua estrita pintura do filósofo grego nos demanda a tarefa de discriminar a diferença entre pensamento e ação. Seria acaso o juízo a ponte entre as atividades de pensamento (...) e da ação política? A preocupação, neste ensaio,é a de mostrar como Hannah Arendt estava procurando por um modo autêntico de filosofia política, cujo maior exemplo seria Sócrates. No mesmo sentido, também se debruça acerca do significado do juízo reflexionante, ideia bastante fecunda em sua obra que permanece ainda bastante alusiva.: In order to understand Arendt’s conceptions of history and political judgment, this article discusses her peculiar interpretation of Socrates. As with her other ideas, such as the banality of evil, the nature of totalitarian terror, and the public space, her portrayal of the Greek philosopher demands that we discriminate between thinking and acting. Would judgment by chance be the bridge between the activities of thought and political action? My aim in this essay is to show how Arendt, from beginning of her work, was looking for an authentic mode of political life, the major example of which is Socrates. I also address what Arendt meant by her idea of a reflexive judgment, an idea that has proved enormously suggestive yet which remains elusive. (shrink)

This volume deals with collocations from a lexicographic perspective by addressing, in detail, the boundaries between collocations and other word combinations, the possibility of adapting the definition of collocation to the objectives of specific dictionaries, and approaches towards collocation extraction for lexicographic purposes.

L’article illustre les particularités procédurales qui caractérisent enquêtes et procès pour les infractions liées au crime organisé. Les règles spéciales édictées pour renforcer l’efficacité de la lutte contre les manifestations de la criminalité organisée sont examinées séparément selon qu’elles affectent directement le droit de la défense ou qu’elles augmentent le pouvoir d’investigation des organes d’enquête (police et ministère public), créant ainsi un grave déséquilibre entre accusation et défense. Même si l’on réduit les droits individuels pour mieux lutter contre le crime (...) organisé, il faut respecter la dignité humaine. Les mesures qui attentent à ces droits doivent être adoptées par un acte motivé de l’autorité judiciaire, dans les cas et selon les modalités prévus par la loi, dans le respect du principe de proportionnalité qui ne peut justifier un sacrifice des droits de la défense lors du jugement. (shrink)

A partir da noção de individuação ético política o texto explora a coextensividade entre o indivíduo emdevir, os processos de sua individuação e o do campo problemático implicado.

Brain-computer interfaces (BCIs) are being investigated as an access pathway to communication for individuals with physical disabilities, as the technology obviates the need for voluntary motor control. However, to date, minimal research has investigated the use of BCIs for children. Traditional BCI communication paradigms may be suboptimal given that children with physical disabilities may face delays in cognitive development and acquisition of literacy skills. Instead, in this study we explored emotional state as an alternative access pathway to communication. We developed (...) a pediatric BCI to identify positive and negative emotional states from changes in hemodynamic activity of the prefrontal cortex (PFC). To train and test the BCI, 10 neurotypical children aged 8–14 underwent a series of emotion-induction trials over four experimental sessions (one offline, three online) while their brain activity was measured with functional near-infrared spectroscopy (fNIRS). Visual neurofeedback was used to assist participants in regulating their emotional states and modulating their hemodynamic activity in response to the affective stimuli. Child-specific linear discriminant classifiers were trained on cumulatively available data from previous sessions and adaptively updated throughout each session. Average online valence classification exceeded chance across participants by the last two online sessions (with 7 and 8 of the 10 participants performing better than chance, respectively, in Sessions 3 and 4). There was a small significant positive correlation with online BCI performance and age, suggesting older participants were more successful at regulating their emotional state and/or brain activity. Variability was seen across participants in regards to BCI performance, hemodynamic response, and discriminatory features and channels. Retrospective offline analyses yielded accuracies comparable to those reported in adult affective BCI studies using fNIRS. Affective fNIRS-BCIs appear to be feasible for school-aged children, but to further gauge the practical potential of this type of BCI, replication with more training sessions, larger sample sizes, and end-users with disabilities is necessary. (shrink)

Peter Abelard was one of the most influential writers and thinkers of the twelfth century, famed for his skill in logic as well as his romance with Heloise. His Collationes - or Dialogue between a Christian, a Philosopher, and a Jew - is remarkable for the boldness of its conception and thought.