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Duration As A Measure Of The Spiral Aftereffect As A Function Of Retinal Size Retinal Place And Hemiretinal Transfer

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Duration As A Measure Of The Spiral Aftereffect As A Function Of Retinal Size Retinal Place And Hemiretinal Transfer

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Author : Sheldon L. Freud
language : en
Publisher:
Release Date : 1964

Duration As A Measure Of The Spiral Aftereffect As A Function Of Retinal Size Retinal Place And Hemiretinal Transfer written by Sheldon L. Freud and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with categories.

Duration Of Spiral Aftereffect As A Function Of Retinal Size Retinal Place And Hemiretinal Transfer

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Author : Sheldon L. Freud
language : en
Publisher:
Release Date : 1963

Duration Of Spiral Aftereffect As A Function Of Retinal Size Retinal Place And Hemiretinal Transfer written by Sheldon L. Freud and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with categories.

This experiment has shown that, although both rods and cones mediate the spiral aftereffect, cone areas give a larger response. Increasing size of the retinal image results in longer durations of SAE but rods are more affected by this increase than are cones. There is a general weakening in aftereffect resulting from 'transfer' from one hemiretina to another with cone areas showing greater loss than rod areas. Size of retinal image was shown to be a potent variable and, in fact, under some small size conditions, normal Ss fail to observe any effect whatsoever. In view of these findings, it is apparent that size of retinal image is a variable which must be carefully controlled if comparable results are to be obtained. Review of the clinical literature, however, reveals that distance from S to spiral and objective spiral size often vary from experiment to experiment. This variation could well account for some of the differences in results of clinical studies. It is proposed that a standard spiral size and testing distance be introduced for clinical use. (Author).

The Spiral After Effect

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Author : Harry C. Holland
language : en
Publisher: Elsevier
Release Date : 2013-10-22

The Spiral After Effect written by Harry C. Holland and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Psychology categories.

The Spiral After-Effect discusses the spiral after-effect of apparent movement. It aims to bring a body of research literature into some compact form for the convenience of students and clinicians in particular, and experimentalists in general. It seeks to outline the main areas of interest in the study of this intriguing illusion and to examine the influence of selected psychophysical, program, and subject factors on its incidence and duration. It also provides a few suggestions for future research. The book begins with an introduction and historical review of studies on the after-effect of apparent movement. Separate chapters then cover stimulus variables and their influence on the incidence and duration of the after-effect; program variables relevant to the incidence and duration of the illusion; the influence of selected observer variables on the incidence and duration of the after-effect; and theoretical explanations of the after-effect. The appendix provides an abstract of the main experiments, findings, and conclusions of the pre-eminent figure in the field of motion aftereffects Dr. G. A. Wohlgemuth who, working between 1905 and 1909, brought together the existing literature up to the period and summarized what was largely nineteenth-century work.