Display lag and gain effects on vection experienced by active observers.

Background: This study examined the effects of display lag and gain on visual self-motion perception (i.e., vection) in active observers.

Depth interval estimates from motion parallax and binocular disparity beyond interaction space.

Static and dynamic observers provided binocular and monocular estimates of the depths between real objects lying well beyond interaction space. On each trial, pairs of LEDs were presented inside a dark railway tunnel. The nearest LED was always 40 m from the observer, with the depth separation between LED pairs ranging from 0 up to 248 m.

Stereoscopic perception of real depths at large distances.

There has been no direct examination of stereoscopic depth perception at very large observation distances and depths. We measured perceptions of depth magnitude at distances where it is frequently reported without evidence that stereopsis is non-functional. We adapted methods pioneered at distances up to 9 m by R.