Effects of Time Delay on Depth Perception via Head-Motion Parallax in Virtual Environment Systems

Experiments were conducted to determine how the ability to detect and discriminate head-motion parallax depth cues is degraded by time delays between head movement and image update. The stimuli consisted of random-dot patterns that were programmed to appear as one cycle of a sinusoidal grating when the subject’s head moved. The results show that time delay between head movement and image update has essentially no effect on the ability to discriminate between two such gratings with different depth characteristics when the delay is less than or equal to roughly