Measured Visual Motion Sensitivity at Fixed Contrast in the Periphery and Far Periphery

Report No. ARL-TR-8094
Authors: Paul D Fedele; Joel T Kalb; Barry D Vaughan; Kathy L Kehring
Date/Pages: August 2017; 42 pages
Abstract: The US Army Materiel Analysis Activity (AMSAA) Infantry Warrior Simulation (IWARS) is a constructive wargame for studying individual and small-group Soldier performance. Soldier performance depends on visual detection of enemy personnel and materiel. Vision modeling in IWARS is neither physiologically accurate nor behaviorally realistic. Movement in peripheral vision significantly influences target detection, but the IWARS visual model does not include target movement in visual detection. Monaco et al. report that most of the research in peripheral motion was conducted with limited fields of view and thus does not apply to target acquisition by dismounted Soldiers. To measure motion detection thresholds, we used targets consisting of bivariate Gaussian contrast distribution, with a Michelson contrast of –0.2 recommended by AMSAA, shaped like upright humans at ranges between 50 and 200 m and eccentricities between 40° and 80°. Measured movement thresholds were between 0.72 and 18°·s-1, corresponding to speeds between 0.71 and 37 m·s-1. Responses indicate that some targets could not be seen at all. These measured peripheral visual motion detection thresholds can be applied in developing a motion detection criterion supporting improved Soldier vision modeling and simulation.
Distribution: Approved for public release
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Last Update / Reviewed: August 1, 2017