Stimulus Determinants of Dynamic Visual Acuity. I. Background and Exploratory Data.
NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
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The measurement approach represented by tests of dynamic visual acuity DVA appears to offer unique potential for assessing visual capabilities which are required in the performance of naval aviation missions, and for investigating the nature of these visual capabilities. The DVA literature reports significant variations in measures of linearity, magnitude, and continuity of the DVA function. Clarification of the quantitative characteristics of the DVA function is required if measures of this function are to be applied to the assessment and prediction of individual capabilities for visual performance, and if the understanding of this function is to influence task design. Selected areas in the DVA literature are summarized. Descriptive data are reported from three exploratory experiments regarding individual differences and the effects of contrast, luminance, and target surround upon DVA performance. Subjects whose static visual acuities were better than 2020, exhibited large individual differences in their abilities to recognize targets moving at 20 degsec and in the rates at which their acuities were degraded for higher target velocities. Initial data indicate that the configuration of the target surround may affect DVA performance significantly. Author
- Anatomy and Physiology