Apparent Motion Quality and Target Detection on a Visually Time-Compressed Display.

摘要

Explanations of the superior target detection performance with visually time-compressed radar displays have involved the assumption that the coherent motion of the target against the random motion of background noise facilitates detection, much as the blossoming of a flower is made apparent by time-lapse photography. From the appearance of the display, this assumption seems reasonable; however, experimental findings are not fully explained in terms of apparent motion. The equivocal nature of the relationship between visually apparent motion and target detection on a time-compressed display prompted an investigation of four spatial and temporal display variables using a central-composite response surface experimental design. Subjects performed three tasks: target detection and two ratings of apparent target motion quality, with random noise dots present and absent. Target detection performance was highly correlated with the scale of motion quality resulting from ratings with noise present but less highly correlated with ratings of target motion quality with noise absent. Nearly all of the variance in motion quality ratings, both with and without noise present, was accounted for by the regression equations derived from the extremely economical data sampling strategy afforded by the central-composite design.