Results for ' visual field defects'

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  1.  25
    How can striate vision contribute to the detection of objects within a homonymous visual field defect?Otmar Meienberg - 1983 - Behavioral and Brain Sciences 6 (3):455.
  2.  10
    Visually driven functional MRI techniques for characterization of optic neuropathy.Sujeevini Sujanthan, Amir Shmuel & Janine Dale Mendola - 2022 - Frontiers in Human Neuroscience 16:943603.
    Optic neuropathies are conditions that cause disease to the optic nerve, and can result in loss of visual acuity and/or visual field defects. An improved understanding of how these conditions affect the entire visual system is warranted, to better predict and/or restore the visual loss. In this article, we review visually-driven functional magnetic resonance imaging (fMRI) studies of optic neuropathies, including glaucoma and optic neuritis (ON); we also discuss traumatic optic neuropathy (TON). Optic neuropathy-related (...)
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  3. Blindsight and visual awareness.Paul Azzopardi & Alan Cowey - 1998 - Consciousness and Cognition 7 (3):292-311.
    Some patients with damaged striate cortex have blindsight-the ability to discriminate unseen stimuli in their clinically blind visual field defects when forced-choice procedures are used. Blindsight implies a sharp dissociation between visual performance and visual awareness, but signal detection theory indicates that it might be indistinguishable from the behavior of normal subjects near the lower limit of conscious vision, where the dissociations could arise trivially from using different response criteria during clinical and forced-choice tests. We (...)
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  4.  8
    A matter of time: improvement of visual temporal processing during training-induced restoration of light detection performance.Dorothe A. Poggel, Bernhard Treutwein, Bernhard A. Sabel & Hans Strasburger - 2015 - Frontiers in Psychology 6:107544.
    The issue of how basic sensory and temporal processing are related is still unresolved. We studied temporal processing, as assessed by simple visual reaction times (RT) and double-pulse resolution (DPR), in patients with partial vision loss after visual pathway lesions and investigated whether vision restoration training (VRT), a training program designed to improve light detection performance, would also affect temporal processing. Perimetric and campimetric visual field tests as well as maps of DPR thresholds and RT were (...)
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  5.  19
    The imbalance of oculomotor capture in unilateral visual neglect.Stefan Der Stigchevanl & Tanja C. W. Nijboer - 2010 - Consciousness and Cognition 19 (1):186-197.
    Visual neglect has been associated with an imbalance in the level of activity in the saccadic system: activity in the contralesional field is suppressed, which makes target selection unlikely. We recorded eye movements of a patient with hemispatial neglect and a group of healthy participants during an oculomotor distractor paradigm. Results showed that the interfering effects of a distractor were very strong when presented in her ipsilesional visual field. However, when the distractor was presented in her (...)
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  6.  6
    Resting-state functional MRI of the visual system for characterization of optic neuropathy.Sujeevini Sujanthan, Amir Shmuel & Janine Dale Mendola - 2022 - Frontiers in Human Neuroscience 16:943618.
    Optic neuropathy refers to disease of the optic nerve and can result in loss of visual acuity and/or visual field defects. Combining findings from multiple fMRI modalities can offer valuable information for characterizing and managing optic neuropathies. In this article, we review a subset of resting-state functional magnetic resonance imaging (RS-fMRI) studies of optic neuropathies. We consider glaucoma, acute optic neuritis (ON), discuss traumatic optic neuropathy (TON), and explore consistency between findings from RS and visually driven (...)
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  7. Review of Martha Farah, visual agnosia. [REVIEW]Austen Clark - unknown
    Common sense says that visual agnosia is impossible. It ought not exist. If an object like a safety pin or a bar of white soap is in full view, you see it, and you know what a "safety pin" or a "bar of soap" is, then you cannot fail to recognize what you see. If you identify the safety pin as "something silver and shiny like a watch or a nail clipper," or you identify the bar of white soap (...)
     
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  8.  71
    Is blindsight an effect of scattered light, spared cortex, and near-threshold vision?John Campion, Richard Latto & Y. M. Smith - 1983 - Behavioral and Brain Sciences 6 (3):423-86.
    Blindsight is the term commonly used to describe visually guided behaviour elicited by a stimulus falling within the scotoma (blind area) caused by a lesion of the striate cortex. Such is normally held to be unconscious and to be mediated by subcortical pathways involving the superior colliculus. Blindsight is of considerable theoretical importance since it suggests that destriate man is more like destriate monkey than had been previously believed and also because it supports the classical notion of two visual (...)
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  9.  30
    Pathological completion: The blind leading the mind?Robin Walker & Jason B. Mattingley - 1998 - Behavioral and Brain Sciences 21 (6):778-779.
    The taxonomy proposed by Pessoa et al. should be extended to include “pathological” completion phenomena in patients with unilateral brain damage. Patients with visual field defects (hemianopias) may “complete” whole figures, while patients with parietal lobe damage may “complete” partial figures. We argue that the former may be consistent with the brain “filling-in” information, and the latter may be consistent with the brain ignoring the absence of information.
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  10.  37
    Effects of unseen stimuli on reaction times to seen stimuli in monkeys with blindsight.Alan Cowey, Petra Stoerig & Carolyne Le Mare - 1998 - Consciousness and Cognition 7 (3):312-323.
    In three macaque monkeys with unilateral removal of primary visual cortex and in one unoperated monkey, we measured reaction times to a visual target that was presented at a lateral eccentricity of 20o in the normal, left, visual hemifield. When an additional stimulus was presented at the corresponding position in the right hemifield (hemianopic in three of the monkeys), it significantly slowed the reaction time to the left target if it preceded it by delays from 100-500 msec. (...)
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  11.  29
    On Friedman's Look.Daniel E. Flage - 1993 - Hume Studies 19 (1):187-197.
    In lieu of an abstract, here is a brief excerpt of the content:On Friedman's Look Daniel E. Flage In a pair of articles and a book (Flage 1985a, 1985b, 1990), I argued that Hume's ideas of memory are relative ideas. In "Another Look at Flage's Hume" (this volume), Lesley Friedman challenges my account on four points. She argues (1) that it is possible to remember simple ideas in their simplicity; (2) that I have misrepresented Humean impressions ofreflection; (3) that I (...)
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  12.  37
    The visual field and the visual world: a reply to Professor Boring.James J. Gibson - 1952 - Psychological Review 59 (2):149-151.
  13.  15
    An assembled message: Matthen on the content of perceptual experience.Max Minden Ribeiro - 2023 - Synthese 202 (2):1-21.
    Mohan Matthen holds that visual perceptual content is divided into descriptive and referential elements. Descriptive content is our awareness of sensory features belonging to objects located in the visual field. Matthen conceives of this in terms of an image. The referential element is a demonstrative form of content, by which we pick out those objects as particulars and assert their physical presence. Matthen terms this ‘the feeling of presence’. Together, they make up the ‘assembled message’ that (...) states present to the perceiver in perceptual experience. I argue that the two elements cannot play together as Matthen envisages. Beginning with the referential element, I show that the feeling of presence is unable to both provide demonstrative reference and assert that the visual state reflects how things are. Turning to the descriptive element, I argue that Matthen is committed to a view on which descriptive (or image) content is a mental entity, a reified image. This is a common element across perceptual experience, episodic memory and visual imagination. The mental entity proves a defective ingredient in assembling perceptual content that purports to present reality. There are problems integrating the depicted viewpoint with the subject’s actual viewpoint, and problems maintaining a coherent notion of assertion. I argue that the project of assembling perceptual experience from descriptive and referential elements is unworkable. (shrink)
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  14.  28
    Visual field and the letter span.Herbert F. Crovitz & H. Richard Schiffman - 1965 - Journal of Experimental Psychology 70 (2):218.
  15. Three varieties of visual field.Austen Clark - 1996 - Philosophical Psychology 9 (4):477-95.
    The goal of this paper is to challenge the rather insouciant attitude that many investigators seem to adopt when they go about describing the items and events in their " visual fields". There are at least three distinct categories of interpretation of what these reports might mean, and only under one of those categories do those reports have anything resembling an observational character. The others demand substantive revisions in one's beliefs about what one sees. The ur-concept of a " (...)
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  16.  48
    The Visual Field in Russell and Wittgenstein.Michael O'Sullivan - 2015 - Philosophical Investigations 38 (4):316-332.
    Bertrand Russell developed a conception of the nature of the visual field, and of other sensory fields, as part of his project of explaining the construction of the external world. Wittgenstein's remarks on the visual field in the Tractatus are in part a response to Russell. Wittgenstein, against Russell, analyses the visual field in terms of facts rather than objects. Further, his conception of the field is, in a distinctive sense, depsychologised.
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  17. Truth and the visual field.Barry Smith - 1999 - In Jean Petitot, Francisco J. Varela, Bernard Pachoud & Jean-Michel Roy (eds.), Naturalizing Phenomenology: Issues in Contemporary Phenomenology and Cognitive Science. Stanford University Press. pp. 317-329.
    The paper uses the tools of mereotopology (the theory of parts, wholes and boundaries) to work out the implications of certain analogies between the 'ecological psychology' of J. J Gibson and the phenomenology of Edmund Husserl. It presents an ontological theory of spatial boundaries and of spatially extended entities. By reference to examples from the geographical sphere it is shown that both boundaries and extended entities fall into two broad categories: those which exist independently of our cognitive acts (for example, (...)
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  18. The Visual Field and Perception.D. W. Hamlyn & A. C. Lloyd - 1957 - Aristotelian Society Supplementary Volume 31:107-144.
  19.  18
    Adaptation to a rotated visual field as a function of degree of optical tilt and exposure time.Sheldon M. Ebenholtz - 1966 - Journal of Experimental Psychology 72 (5):629.
  20.  24
    Visual field articulation in the absence of spatial stimulus gradients.Carl R. Brown & J. W. Gebhard - 1948 - Journal of Experimental Psychology 38 (2):188.
  21.  30
    Visual field position and word-recognition threshold.Willis Overton & Morton Wiener - 1966 - Journal of Experimental Psychology 71 (2):249.
  22.  26
    Effects of the visual field upon perception of change in spatial orientation.Norman L. Corah - 1965 - Journal of Experimental Psychology 70 (6):598.
  23. Sensorimotor expectations and the visual field.Dan Cavedon-Taylor - 2018 - Synthese 198 (Suppl 17):3991-4006.
    Sensorimotor expectations concern how visual experience covaries with bodily movement. Sensorimotor theorists argue from such expectations to the conclusion that the phenomenology of vision is constitutively embodied: objects within the visual field are experienced as 3-D because sensorimotor expectations partially constitute our experience of such objects. Critics argue that there are two ways to block the above inference: to explain how we visually experience objects as 3-D, one may appeal to such non-bodily factors as expectations about movements (...)
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  24.  50
    Does visual-field specialization really have implications for coordinated visual-motor behavior?Richard A. Abrams - 1990 - Behavioral and Brain Sciences 13 (3):542-543.
  25. Disquotational truth and factually defective discourse.Hartry Field - 1994 - Philosophical Review 103 (3):405-452.
  26.  65
    Visual Field and Empty Space.Kristjan Laasik - 2018 - European Journal of Philosophy (published online):403-411.
    In a paper titled “Seeing Empty Space,” Louise Richardson argues for the thesis that seeing empty space involves a certain “structural feature,” namely, “it [s] seeming to one as if some region of space is one in which if some visible object were there, one would see it” (SF; Richardson, 2010, p. 237). I will argue that there is a reason to question whether a structural feature such as SF is needed in order to visually experience empty space. I will (...)
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  27.  26
    Visual Field Advantage: Redefined by Training?Scott A. Stone, Jared Baker, Rob Olsen, Robbin Gibb, Jon Doan, Joshua Hoetmer & Claudia L. R. Gonzalez - 2019 - Frontiers in Psychology 9.
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  28.  27
    Effective visual field size necessary for vertical reading during Japanese text processing.Naoyuki Osaka & Koichi Oda - 1991 - Bulletin of the Psychonomic Society 29 (4):345-347.
  29.  38
    Dissociating the effects of attention and contingency awareness on evaluative conditioning effects in the visual paradigm.Andy P. Field & Annette C. Moore - 2005 - Cognition and Emotion 19 (2):217-243.
    Two experiments are described that investigate the effects of attention in moderating evaluative conditioning (EC) effects in a picture‐picture paradigm in which previously discovered experimental artifacts (e.g., Field & Davey, 1999 Field, AP, and Davey, GCL, (1999). Reevaluating evaluative conditioning: A nonassociative explanation of conditioning effects in the visual evaluative conditioning paradigm, Journal of Experimental Psychology. Animal Behavior Processes 25 ((1999)), pp. 211–224.[Crossref], [PubMed], [Web of Science ®], [Google Scholar]) were overcome by counterbalancing conditioned stimuli (CSs) and (...)
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  30.  16
    Transposing Gestalt Phenomena from Visual Fields to Practical and Interactional Work: Garfinkel’s and Sacks’ Social Praxeology.Michael Eisenmann Lynch - 2022 - Philosophia Scientiae:95-122.
    In lectures and writings in the decades following the publication of Studies in Ethnomethodology [1967], Harold Garfinkel, the founder of ethnomethodology, developed what he called a “misreading” of the phenomenological writings of Aron Gurwitsch, Maurice Merleau-Ponty and others. Garfinkel’s “misreading” included a selective and creative treatment of themes that Gurwitsch drew from Gestalt psychology, such as figure-ground, Gestalt contexture, and the phenomenal field. Rather than identifying these themes with visual perception demonstrated with picture-puzzles (for example, of animals hidden (...)
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  31.  12
    Typical visual-field locations facilitate access to awareness for everyday objects.Daniel Kaiser & Radoslaw M. Cichy - 2018 - Cognition 180 (C):118-122.
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  32.  6
    Self-Perception and the Relation to Actual Driving Abilities for Individuals With Visual Field Loss.Jan Andersson, Tomas Bro & Timo Lajunen - 2022 - Frontiers in Human Neuroscience 16.
    BackgroundIn Sweden, individuals with visual field loss have their driving license withdrawn. The literature clearly indicates that individuals with VFL are unsafe drivers on a group level. However, many drivers with VFL can be safe on an individual level. The literature also suggests that self-perception, beliefs, and insights of one’s own capabilities are related to driving performance. This study had three aims: To investigate self-perceived driving capability ratings for individuals with VFL; to compare these ratings between groups with (...)
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  33. Peripheral visual field size necessary for visual search during Japanese text reading: effect of working memory.M. Osaka & N. Osaka - 1996 - In Enrique Villanueva (ed.), Perception. Ridgeview Pub. Co. pp. 75-76.
     
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  34. There are no visual fields (and no minds either).Mark Johnston - 2011 - Analytic Philosophy 52 (4):231-242.
  35.  13
    Visual field asymmetries in object individuation.Irina M. Harris, Cara Wong & Sally Andrews - 2015 - Consciousness and Cognition 37:194-206.
  36.  16
    Modifications of Visual Field Asymmetries for Face Categorization in Early Deaf Adults: A Study With Chimeric Faces.Marjorie Dole, David Méary & Olivier Pascalis - 2017 - Frontiers in Psychology 8.
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  37.  26
    Transient increase of intact visual field size by high-frequency narrow-band stimulation.Mark A. Elliott, Doerthe Seifert, Dorothe A. Poggel & Hans Strasburger - 2015 - Consciousness and Cognition 32:45-55.
  38.  59
    Psychopathy, Other-Regarding Moral Beliefs, and Responsibility.Lloyd Fields - 1996 - Philosophy, Psychiatry, and Psychology 3 (4):261-277.
    In lieu of an abstract, here is a brief excerpt of the content:Psychopathy, Other-Regarding Moral Beliefs, and ResponsibilityLloyd Fields (bio)AbstractIn this paper I seek to show that at least one kind of psychopath is incapable of forming other-regarding moral beliefs; hence that they cannot act for other-regarding moral reasons; and hence that they are not appropriate subjects for the assessment of either moral or legal responsibility. Various attempts to characterize psychopaths are considered and rejected, in particular the widely held view (...)
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  39.  7
    Scotomas and the visual field.Adam Morton - 1983 - Behavioral and Brain Sciences 6 (3):456.
  40.  10
    Working memory modulates the anger superiority effect in central and peripheral visual fields.Xiang Li, Zhen Lin, Yufei Chen & Mingliang Gong - 2023 - Cognition and Emotion 37 (2):271-283.
    Angry faces have been shown to be detected more efficiently in a crowd of distractors compared to happy faces, known as the anger superiority effect (ASE). The present study investigated whether the ASE could be modified by top-down manipulation of working memory (WM), in central and peripheral visual fields. In central vision, participants held a colour in WM for a final memory test while simultaneously performing a visual search task that required them to determine whether a face showed (...)
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  41. Symposium: The Visual Field and Perception.D. W. Hamlyn & A. C. Lloyd - 1957 - Aristotelian Society Supplementary Volume 31:107-144.
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  42.  15
    Peripheral lower visual fields: A neglected factor?Naoyuki Osaka - 1990 - Behavioral and Brain Sciences 13 (3):555-555.
  43.  14
    The left visual field attentional advantage: No evidence of different speeds of processing across visual hemifields.Miguel A. García-Pérez & Rocío Alcalá-Quintana - 2015 - Consciousness and Cognition 37 (C):16-26.
  44.  31
    Elimination of visual field effects by use of a single report technique: Evidence for order-of-report artifact.Marylin C. Smith & Susan Ramunas - 1971 - Journal of Experimental Psychology 87 (1):23.
  45.  18
    Effects of visual field of presentation and stimulus characteristics on visual discrimination learning.Patricia Y. LeFebvre & Sunnan K. Kubose - 1975 - Bulletin of the Psychonomic Society 5 (1):13-15.
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  46.  18
    A response instruction by visual-field interaction: S-R compatibility effect or?Bill Cotton, Ovid J. L. Tzeng & Curtis Hardyck - 1977 - Bulletin of the Psychonomic Society 10 (6):475-477.
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  47.  30
    Sensitivity of the observer to transformations of the visual field.Myron L. Braunstein - 1966 - Journal of Experimental Psychology 72 (5):683.
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  48.  78
    Truth and the absence of fact.Hartry H. Field - 2001 - New York: Oxford University Press.
    Presenting a selection of thirteen essays on various topics at the foundations of philosophy--one previously unpublished and eight accompanied by substantial new postscripts--this book offers outstanding insight on truth, meaning, and propositional attitudes; semantic indeterminacy and other kinds of "factual defectiveness;" and issues concerning objectivity, especially in mathematics and in epistemology. It will reward the attention of any philosopher interested in language, epistemology, or mathematics.
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  49.  7
    The Gibsonian visual field.Edwin G. Boring - 1952 - Psychological Review 59 (3):246-247.
  50.  5
    Analysing real-world visual search tasks helps explain what the functional visual field is, and what its neural mechanisms are.John Campion - 2017 - Behavioral and Brain Sciences 40:e133.
    Rejecting information-processing-based theory permits the merging of a top-down analysis of visual search tasks with a bottom-up analysis of brain structure and function. This reveals the true nature of the functional visual field and its precise role in the conduct of visual search tasks. The merits of such analyses over the traditional methods of the authors are described.
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