Direct Realism and the Analysis of Perceptual Error

2000 ◽  
Vol 10 (5) ◽  
pp. 605-613 ◽  
Author(s):  
Graeme Galloway
Author(s):  
J. Christopher Maloney

The supposed problem of perceptual error, including illusion and hallucination, has led most theories of perception to deny formulations of direct realism. The standard response to this apparent problem adopts the mistaken presupposition that perception is indeed liable to error. However, the prevailing conditions of observation are themselves elements of perceptual representation, functioning in the manner of predicate modifiers. They ensure that the predicates applied in perceptual representations do indeed correctly attribute properties that perceived physical objects actually instantiate. Thus, perceptual representations are immune to misrepresentation of the sort misguidedly supposed by the spurious problem of perceptual misrepresentation. Granted the possibility that perceptual attribution admits of predicate modification, it is quite possible that perceptual experience permits both rudimentary and sophisticated conceptualization. Moreover, such treatment of perceptual predication rewards by providing an account of aspect alteration exemplified by perception of ambiguous stimuli.


Author(s):  
Clayton Littlejohn ◽  
Julien Dutant

AbstractWordly internalists claim that while internal duplicates always share the same evidence, our evidence includes non-trivial propositions about our environment. It follows that some evidence is false. Worldly internalism is thought to provide a more satisfying answer to scepticism than classical internalist views that deny that these propositions about our environment might belong to our evidence and to provide a generally more attractive account of rationality and reasons for belief. We argue that worldly internalism faces serious difficulties and that its apparent advantages are illusory. First, it cannot adequately handle some not terribly strange cases of perceptual error. Second, it cannot explain why one should plan to use their evidence to update their beliefs. The second issue allows us to explain why cases of misplaced certainty do not require us to introduce false evidence into our views and that why the alleged advantage of worldly internalism in resisting sceptical pressures is illusory.


1999 ◽  
Vol 11 (1) ◽  
pp. 267-296 ◽  
Author(s):  
John Lazzaro ◽  
John Wawrzynek

A JPEG Quality Transcoder (JQT) converts a JPEG image file that was encoded with low image quality to a larger JPEG image file with reduced visual artifacts, without access to the original uncompressed image. In this article, we describe technology for JQT design that takes a pattern recognition approach to the problem, using a database of images to train statistical models of the artifacts introduced through JPEG compression. In the training procedure for these models, we use a model of human visual perception as an error measure. Our current prototype system removes 32.2% of the artifacts introduced by moderate compression, as measured on an independent test database of linearly coded images using a perceptual error metric. This improvement results in an average PSNR reduction of 0.634 dB.


2018 ◽  
Vol 4 (s1) ◽  
pp. s146-s171
Author(s):  
Michał Mrugalski

AbstractConsidering that enacitivsm emerged in rebellion against the representativism of first-generation cognitive science, an enactivist approach to narrative, which after all does relate events, situations, people, necessitates a directly realistic (i. e. anti-representationalist) concept of perspective on literary objects. Ingarden’s description of the spatio-temporal properties of the cognizing of the literary work, in the process of which the reader transgresses the realm of signs (representation) toward embodied and culturally embedded cognition of objects and events in a presented world, may serve as a prototype for an enactive approach narrative, provided the theory in question is situated in its original context, for example that of Ingarden’s ongoing discussion with structuralism regarded at this juncture as a representationist stance. In the first step, I am referring to the philosophical tradition of direct realism, which was apparently invigorated by the theories of embodied and enactive cognition, to propose a way of conceiving first-person perspective on literary objects and events, first-person and temporal perspective on objects being the royal road to all sorts of enaction. In the second step, I am tackling the issue of point of view in East and Central European structuralism by recalling its most general context of the dialectical relationship between synchrony and diachrony. The interpretation of linguistic signs by the receiver is a space in which structuralism and Ingarden’s phenomenology concur as they share a similar model of receptive temporality, rooted in Husserl’s description of the inner consciousness of time and aiming to reduce the ambiguity of linguistic units and increase the predictability of meaning. In Ingarden, however, there is a threshold between the linguistic and the extralinguistic elements of the literary work, which are conceived in a directly realistic manner. I specifically recall the notion of “objectification,” which was suppressed by that of “concretization,” as a borderland between indirect (semiotic) and indirect (objectual and enactive) representation. In the conclusion, I point to the major differences between present-day cognitivist aesthetics and Ingarden’s approach, which was immersed in the culture of his time, and ask whether these differences impede us to achieve as interesting results as Ingarden’s.


The Monist ◽  
1931 ◽  
Vol 41 (1) ◽  
pp. 140-153
Author(s):  
John B. Kent ◽  
Keyword(s):  

1981 ◽  
Vol 53 (1) ◽  
pp. 235-238 ◽  
Author(s):  
Lillian R. Putnam

With mental ages partialled out, the correlation of −0.25 between perceptual error scores of 102 remedial readers on the Minnesota Percepto-Diagnostic Test and Woodcock Reading Mastery Tests was not significant. Intra-group analysis of scores on reproductions showed that those in the organic classification made significantly more errors on the horizontal arrow figure. Inter-group analysis indicated significant differences among primary, secondary, and organic classifications with the organic producing the most errors on the horizontal arrow figure. Inter-group analysis of brain-damage indicators yielded no significant differences; inter-group analysis showed that those assigned the organic classifications made significantly more errors in distortion of dots.


2017 ◽  
Vol 17 (10) ◽  
pp. 331
Author(s):  
Ryan Schubert ◽  
Gerd Bruder ◽  
Greg Welch

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