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)
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)
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)
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)
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)
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)
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.
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, 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.
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.
It seems opportune to commemorate in ‘Augustinianum’ the centenary of the birth of Alan Turing, insofar as he is an outstanding figure whose theoritical insight gave birth to the computer revolution of the twentieth centur y. His theories are equally important for the methodology supporting studies in the humanities.
The collection of Coptic literary papyri of the Egyptian Museum of Turin is one of the most important in the world, if not for the number of codices, certainly for their contribution to the knowledge of Coptic literature and codicology. This paper makes an exhaustive list of the codices and of the works that they contain, with reference to their publication, especially that of Francesco Rossi , who could read more than is visible today. The tables provided are useful because (...) the papyri have been set in different order , after Rossi’s publication. (shrink)
resumo: O texto visa valorizar aspectos promissores do encontro filosófico entre Gilles Deleuze e Gilbert Simondon em torno da recriação do problema da individuação e da ênfase na problemática das disparações intensivas. abstract: The text aims to enrich promising aspects of the philosophical encounter between Gilles Deleuze and Gilbert Simondon around the recreation of the individuation problem and the emphasis in the intensive disparitions problematic.
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)
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)
Parmi les nombreuses réflexions consacrées à l’espace de la ville et à sa condition contemporaine, certaines considèrent que les relations à l’intérieur des villes sont décisives pour penser aujourd’hui le fonctionnement social. Ces relations, en tant que productrices de signification, sont l’objet des sciences du langage, en particulier lorsque celles-ci estiment que le sens se constitue socialement et historiquement. Les cinq textes réunis ici se rattachent au thème de recherche Savoir urba..
This article argues against the non-cognitivist theory of vision that has been formulated in the work of Nico Orlandi. It shows that, if we understand ‘representation’ in the way Orlandi recommends, then the visual system’s response to abstract regularities must involve the formation of representations. Recent experiments show that those representations must be used by the visual system in the production of visual experiences. Their effects cannot be explained by taking them to be non-visual effects involving attention or (...) memory. This contradicts Orlandi’s version of the non-cognitivist hypothesis, but does so while vindicating her methodological position. (shrink)
In The Innocent Eye, Nico Orlandi argues that vision is not a cognitive process. In particular, she argues that forming subject-level visual representations that are available for reasoning should not itself be understood as a process of inference. This comes to the claim that vision (properly so-called) is a process that produces representations but is not best understood as a process that uses representations.
The paper aims to assess the theory of mind of sexual offenders. We administered to 21 sexual offenders and to 21 nonoffenders two classical first- and second-order ToM tasks, a selection of six Strange Stories, and a semi-structured interview, the Theory of Mind Assessment Scale , which provides a multi-dimensional evaluation of ToM, investigating first- vs. third-person and egocentric vs. allocentric perspectives. Results show that sexual offenders performed worse than controls on second-order ToM tasks, on Strange Stories and on each (...) of the Th.o.m.a.s dimensions, whereas they did as well as the control group on first-order ToM tasks. A detailed analysis of participants’ performance on Th.o.m.a.s. showed that sex offenders performed worse on the third-person than on the first-person ToM scale, and worse on the allocentric than on the egocentric perspective; these findings did not apply to the controls. Implications for future research and treatment are discussed. (shrink)