OCULOMOTOR BEHAVIOR AND VISUAL HEMI-NEGLECT.
Item
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Title
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OCULOMOTOR BEHAVIOR AND VISUAL HEMI-NEGLECT.
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Identifier
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AAI8401481
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identifier
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8401481
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Creator
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JOHNSTON, CRIS W.
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Contributor
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Prof. Leonard Diller
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Date
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1983
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Language
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English
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Publisher
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City University of New York.
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Subject
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Psychology, Clinical
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Abstract
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The present study sought to determine if the severity of visual hemi-neglect (VHN) is reflected in the degree of abnormality of oculomotor (OM) behavior, and also to investigate the effect responding to stimuli in different spatial fields has on OM behavior. The dependent variables employed consisted of the gross measure Exploration Time, which yields a value based on the amount of time a subject spends exploring different areas of a visual display, as well as the components of exploratory behavior, i.e., Saccadic Latency, Saccadic Accuracy, and Fixation Stability. Ten adult right hemisphere stroke patients with marked VHN, 10 with mild VHN, and 10 neurologically unimpaired adults were studied. Although all variables distinguished the control subjects from those with marked VHN, other group differences varied with the different OM measures. Fixation Stability was the only variable that demonstrated a spatial field effect. Furthermore, the direction of eye movement and the presence of a sensory visual field deficit were found to be important factors in interpreting the findings. It was concluded that the relationship between VHN and OM behavior is complex, and that sorting out the complexities should aid in the development of programs designed to remediate neglect.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Psychology
