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Author : Amira Amina Rezec
Publisher :
ISBN 13 :
Total Pages : 336 pages
Book Rating : 4.:/5 (318 download)
Download or read book Effects of Attention on Visual Motion Processing written by Amira Amina Rezec and published by . This book was released on 2004 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Valeska Marija Stephan
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (931 download)
Download or read book The Influence of Attention on Motion Processing written by Valeska Marija Stephan and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis examined the influences of attention on the processing of complex and simple motion stimuli. The work consists of two physiology studies. In the first study we investigated the question of how complex motion stimuli, namely transparent motion stimuli, are processed in area MT and the influence of attention on the processing. In our second study we were interested in attentional effects on visual motion stimuli in the primary visual cortex. We find a strong feature-based component which contributes to the processing of complex motion stimuli. Furthermore we show that effects of s ...
Author : Laura Busse
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (255 download)
Download or read book Effects of Selective Attention on Sensory Processing of Visual Motion written by Laura Busse and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alexander Christopher Huk
Publisher :
ISBN 13 :
Total Pages : 544 pages
Book Rating : 4.F/5 ( download)
Download or read book Visual Motion Processing in the Human Cortex written by Alexander Christopher Huk and published by . This book was released on 2001 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Marc D. Binder
Publisher : Springer
ISBN 13 : 9783540237358
Total Pages : 4398 pages
Book Rating : 4.2/5 (373 download)
Download or read book Encyclopedia of Neuroscience written by Marc D. Binder and published by Springer. This book was released on 2008-10-13 with total page 4398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 5000-page masterwork is literally the last word on the topic and will be an essential resource for many. Unique in its breadth and detail, this encyclopedia offers a comprehensive and highly readable guide to a complex and fast-expanding field. The five-volume reference work gathers more than 10,000 entries, including in-depth essays by internationally known experts, and short keynotes explaining essential terms and phrases. In addition, expert editors contribute detailed introductory chapters to each of 43 topic fields ranging from the fundamentals of neuroscience to fascinating developments in the new, inter-disciplinary fields of Computational Neuroscience and Neurophilosophy. Some 1,000 multi-color illustrations enhance and expand the writings.
Author : Gerald M. Edelman
Publisher : Wiley-Interscience
ISBN 13 :
Total Pages : 738 pages
Book Rating : 4.3/5 (91 download)
Download or read book Dynamic Aspects of Neocortical Function written by Gerald M. Edelman and published by Wiley-Interscience. This book was released on 1984 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Florian Pieper
Publisher :
ISBN 13 :
Total Pages : 91 pages
Book Rating : 4.:/5 (254 download)
Download or read book Attention and Adaptation in Visual Motion Processing written by Florian Pieper and published by . This book was released on 2007 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Xiaohua Zhuang
Publisher :
ISBN 13 :
Total Pages : 103 pages
Book Rating : 4.:/5 (67 download)
Download or read book The Effects of Feature-based Attention on Perception written by Xiaohua Zhuang and published by . This book was released on 2010 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Feature-based attention is one of the mechanisms that can facilitate the processing of many aspects of our visual perception. A variety of paradigms were employed in the current dissertation to further investigate how feature-based attention modulates motion perception, visual search and temporal processing of stimuli. The first set of experiments aimed to explore the effects of feature-based attention on the processing of motion speed and motion direction separately. Speed and direction discrimination tasks were used in separate experiments. Results showed that feature-based attention has more dramatic influence on direction perception than on speed perception. This may be taken as evidence that humans are more sensitive to motion speed change than to motion direction change. The second set of experiments was designed to study how performance in color-orientation conjunctive searches changes when observers attend to a pre-cued location, or a pre-cued feature (color or orientation), as well as the temporal characteristics of these precue effects. Color (sensory and symbolic) and location precues improved search performance. The magnitude of improvement did not vary as the inter-stimulus interval (ISI) changed for color and location cues. The sensory color and location cues exhibited their effect in directing visual search as early as 0 ms of ISI. However, orientation precue did not facilitate nor inhibit the search processing. These results may imply that color is a better feature to base the segmentation processing on and thereby facilitate the visual search processing. The third set of experiments explored the existence of feature-based attentional prior-entry effect, which refers to the hypothesis that attended objects are perceived prior to unattended ones. Temporal order judgment (TOJ) and simultaneity judgment (SJ) tasks were employed to test this hypothesis. Prior-entry effect for objects with attended feature was found in TOJ task, the most frequently used paradigm in the literature to claim the spatial prior-entry effect, but the effect was absent in the SJ task. This could be due to a second-order response bias in the TOJ task, or to the fact that the SJ task is not as sensitive as the TOJ task.
Author : Melissa Saenz
Publisher :
ISBN 13 :
Total Pages : 310 pages
Book Rating : 4.:/5 (318 download)
Download or read book Global Effects of Attention in Human Visual Cortex written by Melissa Saenz and published by . This book was released on 2002 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : George Mather
Publisher : MIT Press
ISBN 13 : 9780262133432
Total Pages : 252 pages
Book Rating : 4.1/5 (334 download)
Download or read book The Motion Aftereffect written by George Mather and published by MIT Press. This book was released on 1998 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Motion perception lies at the heart of the scientific study of vision. The motion aftereffect (MAE) is the appearance of directional movement in a stationary object or scene after the viewer has been exposed to viusal motion in the opposite direction. For example, after one has looked at a waterfall for a period of time, the scene beside the waterfall may appear to move upward when one's gaze is transfered to it. Although the phenomenon seems simple, research has revealed copmlexities in the underlying mechanisms, and offered general lessons about how the brain processes visual information. In the 1990s alone, more than 200 papers have been published on MAE, largely inspired by improved techniques for examining brain electrophysiology and by emerging new theories of motion perception.
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)
Download or read book Visual Motion Perception, Visual Attention and Visual Information Processing written by and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuing work on the three-systems-theory of visual motion perception: (I) Isoluminant chromatic motion is perceived by and only by the third-order motion system. (2) New illusion. Cancelling salience modulation in the third-order motion system causes brightly colored moving red-green gratings to appear to be motionless (motion standstill illusion) that gives considerable insight into the mechanisms of object perception. (3) A prediction that motion could be used to provide amplification of apparent contrast was verified, with amplifications>5x. (4) Amplification procedures were used to construct purified stimuli to stimulate each motion system individually, and (5) to measure the amplification produced by selective attention to a feature. (6) Developed computational models oi attentional amplification of features and of the movement dynamics of spatial attention. The spatial attentional mode was investigated with a new paradigm (gating spatial attention) to enable measurements of iconic memory uncontaminated by attention dynamics and to demonstrate that a new attention "window' open concurrently at all points within the window. (7) The spatial attention model predicts 90% of the variance in a huge data set (approximately 500 points per observer from>20,000 trials) and encompasses the major attention paradigms. (All items plus more are fully described in publications.).
Author :
Publisher :
ISBN 13 :
Total Pages : 206 pages
Book Rating : 4.:/5 (931 download)
Download or read book Spatial, Feature and Temporal Attentional Mechanisms in Visual Motion Processing written by and published by . This book was released on 2012 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The three projects documented in this thesis investigated the role of three forms of attention in visual processing. Spatial, feature-based and temporal attention. The spatial and feature-based attentional characteristics were studied by conducting extracellular recordings from neurons of area MT and MSTd of macaque visual cortex. While the role of temporal attention was studied in a human psychophysics project. In the physiology projects we first defined the tuning characteristics of neurons from area MT and MSTd for two stimulus dimensions, namely spiral motion stimuli (SMS) and linear mo...
Author : National Research Council
Publisher : National Academies Press
ISBN 13 :
Total Pages : 75 pages
Book Rating : 4./5 ( download)
Download or read book Emergent Techniques for Assessment of Visual Performance written by National Research Council and published by National Academies Press. This book was released on 1985-01-01 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent vision research has led to the emergence of new techniques that offer exciting potential for a more complete assessment of vision in clinical, industrial, and military settings. Emergent Techniques for Assessment of Visual Performance examines four areas of vision testing that offer potential for improved assessment of visual capability including: contrast sensitivity function, dark-focus of accommodation, dynamic visual acuity and dynamic depth tracking, and ambient and focal vision. In contrast to studies of accepted practices, this report focuses on emerging techniques that could help determine whether people have the vision necessary to do their jobs. In addition to examining some of these emerging techniques, the report identifies their usefulness in predicting performance on other visual and visual-motor tasks, and makes recommendations for future research. Emergent Techniques for Assessment of Visual Performance provides summary recommendations for research that will have significant value and policy implications for the next 5 to 10 years. The content and conclusions of this report can serve as a useful resource for those responsible for screening industrial and military visual function.
Author : Laurent Itti
Publisher : Elsevier
ISBN 13 : 0080454313
Total Pages : 757 pages
Book Rating : 4.0/5 (84 download)
Download or read book Neurobiology of Attention written by Laurent Itti and published by Elsevier. This book was released on 2005-03-31 with total page 757 pages. Available in PDF, EPUB and Kindle. Book excerpt: A key property of neural processing in higher mammals is the ability to focus resources by selectively directing attention to relevant perceptions, thoughts or actions. Research into attention has grown rapidly over the past two decades, as new techniques have become available to study higher brain function in humans, non-human primates, and other mammals. Neurobiology of Attention is the first encyclopedic volume to summarize the latest developments in attention research.An authoritative collection of over 100 chapters organized into thematic sections provides both broad coverage and access to focused, up-to-date research findings. This book presents a state-of-the-art multidisciplinary perspective on psychological, physiological and computational approaches to understanding the neurobiology of attention. Ideal for students, as a reference handbook or for rapid browsing, the book has a wide appeal to anybody interested in attention research. * Contains numerous quick-reference articles covering the breadth of investigation into the subject of attention* Provides extensive introductory commentary to orient and guide the reader* Includes the most recent research results in this field of study
Author : Jochen Braun
Publisher : MIT Press
ISBN 13 : 9780262024938
Total Pages : 358 pages
Book Rating : 4.0/5 (249 download)
Download or read book Visual Attention and Cortical Circuits written by Jochen Braun and published by MIT Press. This book was released on 2001 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: An attempt to derive a comprehensive theory of attention from both neurobiological and psychological data.
Author : Harold Pashler
Publisher : Psychology Press
ISBN 13 : 1317715489
Total Pages : 68 pages
Book Rating : 4.3/5 (177 download)
Download or read book Attention written by Harold Pashler and published by Psychology Press. This book was released on 2016-01-28 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection of essays, intended as a text for students, examines the different facets of research into attention. The book is divided into two sections: one deals with psychological research into such areas as visual search, dual-task interference and attentional bottleneck; the other deals with approaches to neural-network modelling and the effects of brain damage on attention.
Author : Anne-Sophie Del Vecchio
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (11 download)
Download or read book The Effect of Visual Active Selection on the Modulation of the Motion Aftereffect for First- and Second-order Motion Components written by Anne-Sophie Del Vecchio and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the literature about the effect of attention on motion processing, it is clear that attention improves the processing of motion. However, it is not clear what happens to the processing of a motion in the same visual field as another actively attended motion. Is the unattended motion unprocessed, processed to a lesser degree or suppressed? This is the question that I investigated in this thesis. The effect of active visual selection during adaptation to components of a plaid on the motion aftereffect (MAE) duration was investigated using a dynamic test stimulus oriented either like the attended component or like the unattended component. The plaids were composed of two spatially superimposed, but temporally alternating square-wave or sine-wave gratings differing by 140 degrees in motion direction. The results show that active suppression occurs in the MAE duration for a non-attended moving component of a plaid when attention is actively directed to another moving component in the same visual field during adaptation. This is true whether the adaptation plaid is made up of either: (1) two first-order gratings, (2) two second-order gratings, or (3) a mixture of first-order and second-order gratings. I also demonstrated that adapting to a single grating produced longer MAE than grating when the same grating was a component of a plaid. Therefore, the presence of an unattended moving component in the same visual field as an attended moving component reduces the strength of the MAE for the attended component of a plaid The results of this thesis suggest that: (1) Attention is decreased when many moving stimuli are present in the visual field. (2) Attention acts on motion processing in the same manner when first-order motion and second-order motion are processed. (3) The suppression of the unattended moving stimuli is not perfect. During adaptation, attention involuntarily switched to the unattended moving component, which could be an adaptive mechanism in order to be able to react and avoid collision with unattended moving stimuli heading toward us.
