Stimulus Determinants of Dynamic Visual Acuity. II. Effects of Limiting the Target Surround.
Abstract
Differences among laboratories regarding the magnitude and linearity of the DVA function appear to be due, in part, to variations in the configuration of the stimulus field surrounding the stimulus target. Available data do not provide an adequate basis for predicting the effects upon the DVA function of relatively simple variations in stimulus configuration. Clarification of effects of stimulus configurations surrounding the target is required if measures of DVA are to be standardized and applied to the prediction of individual capabilities, and to the development of criteria for the design of visual displays. Experiments were conducted to determine the effects upon DVA performance of limiting the illuminated area surrounding the target. Although no effect was observed when the target velocity was 20 deg/sec, the degradation in performance at 110 deg/sec was significantly increased when the target surround area was decreased. This velocity by surround interaction demonstrates the nonlinear effect upon the DVA function which may be incurred as a result of a relatively simple change in the target surround.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 25, 1980
- Accession Number
- ADA108897
Entities
People
- James E. Goodson
- Tommy R. Morrison
Organizations
- Naval Aerospace Medical Research Laboratory