Visual Perception-- Psychophysics

Westheimer, Gerald
October 1974
Journal of Learning Disabilities;Oct1974, Vol. 7 Issue 8, p489
Academic Journal
This article presents information on a recent research on visual psychophysics, conducted by researcher R.W. Ditchburn. According to the article author, analyzing the physical basis of perception is an art shared by few. Ditchburn has written a text of significance on his research, titled "Eye-Movements and Visual Perception." Ditchburn, a physicist, helped a generation of physics students to a better appreciation of optics through his textbook on light. During the last 25 years, however, his main interest has been the visual effects of stabilizing the retinal image, which he was one of the first to achieve. Basic information on the optical and optomotor factors in the formation of the retinal image is presented in his research. There are various information on the physiology of visual sensory processes, as well as of the eye movement apparatus in man. Most of it, however, is concerned with the effect on visual thresholds of various programs of eve movements, and, in particular, the nulling out of normal micronystagmus. A few sections deal with changes in pattern perception when retinal images are stabilized.


Related Articles

  • Failure to adhere to a prescribed drug treament has dire consequences for a young boy referred to the Wills ER. Cohen, Michael N.; Mehta, Sonia; Kohara, Eunice M.; Ohnsman, Christina M.; Levin, Alex V. // Review of Ophthalmology;Feb2014, Vol. 21 Issue 2, p67 

    The article presents a case study of an 11-year-old boy with photophobia, decreased vision and redness in left eye. He was found to have non-contributory medical, surgical or ocular history and the patient refused to have any ocular trauma or disease contacts. Later ocular examination showed...

  • What Does the Frostig DTVP Measure? Sabatino, David A.; Abbott, John C.; Becker, John T. // Exceptional Children;Mar1974, Vol. 40 Issue 6, p453 

    The article evaluates the application of the Frostig Developmental Test of Visual Perception (DTVP)in measuring the distinct visual-motor perceptual behaviors of kindergarten age children in the U.S. The DTVP is composed of five subtests and each is measuring the distinct visual-motor perceptual...

  • Interactions between voluntary and involuntary attention modulate the quality and temporal dynamics of visual processing. Grubb, Michael; White, Alex; Heeger, David; Carrasco, Marisa // Psychonomic Bulletin & Review;Apr2015, Vol. 22 Issue 2, p437 

    Successfully navigating a dynamic environment requires the efficient distribution of finite neural resources. Voluntary (endogenous) covert spatial attention selectively allocates those processing resources to goal-relevant locations in the visual scene in the absence of eye movements. However,...

  • Spatiotemporal Form Integration: Sequentially presented inducers can lead to representations of stationary and rigidly rotating objects. McCarthy, J.; Strother, Lars; Caplovitz, Gideon // Attention, Perception & Psychophysics;Nov2015, Vol. 77 Issue 8, p2740 

    Objects in the world often are occluded and in motion. The visible fragments of such objects are revealed at different times and locations in space. To form coherent representations of the surfaces of these objects, the visual system must integrate local form information over space and time. We...

  • Fooling the Eyes: The Influence of a Sound-Induced Visual Motion Illusion on Eye Movements. Fracasso, Alessio; Targher, Stefano; Zampini, Massimiliano; Melcher, David // PLoS ONE;Apr2013, Vol. 8 Issue 4, p1 

    :The question of whether perceptual illusions influence eye movements is critical for the long-standing debate regarding the separation between action and perception. To test the role of auditory context on a visual illusion and on eye movements, we took advantage of the fact that the presence...

  • The attentional blink across stimulus modalities: evidence for central processing limitations. Arnell, Karen M.; Jolicoeur, Pierre // Journal of Experimental Psychology. Human Perception & Performan;Jun99, Vol. 25 Issue 3, p630 

    Reveals the presence of a deficit in probe report accuracy among participants reporting on a visual target. Attentional blink deficit; Visual limitations; Crossing of target modality with probe modality; Attentional blink for auditory probes.

  • Segmentation of moving images by the human visual system. Chantelau, Klaus // Biological Cybernetics;1997, Vol. 77 Issue 2, p89 

    Abstract. New segments appearing in an image sequence or spontaneously accelerated segments are band limited by the visual system due to a nonperfect tracking of these segments by eye movements. In spite of this band limitation and acceleration of segments, a coarse segmentation (initial...

  • Effects of similarity and history on neural mechanisms of visual selection. Bichot, Narcisse P.; Schall, Jeffrey D. // Nature Neuroscience;Jun99, Vol. 2 Issue 6, p549 

    To investigate how the brain combines knowledge with visual processing to locate eye movement targets, we trained monkeys to search for a target defined by a conjunction of color and shape. On successful trials, neurons in the frontal eye field not only discriminated the target from distractors,...

  • Effects of spatial and symbolic precues on localization performance. Adam, Jos J.; Huys, Raoul; van Loon, Editha M.; Kingma, Herman; Paas, Fred G. W. C. // Psychological Research;2000, Vol. 63 Issue 1, p66 

    Presents information on a study which examined the effects of spatial and symbolic precues on localization performance. Properties of spatial vision; History of object localization; Methodology; Results and discussion; Conclusions.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics