It is known that rotation of a furnished room around the roll axis of erect subjects produces
an illusion of 360° self-rotation in many subjects. Exposure of erect subjects to stationary …

A tilted furnished room can induce strong visual reorientation illusions in stationary subjects.
Supine subjects may perceive themselves upright when the room is tilted 90° so that the …

Three types of visual information contribute to the sense of self orientation with respect to
gravity: visual polarity of objects with a distinct top and bottom, the principal vertical and …

The effect of field size, velocity, and visual fixation upon the perception of self-body rotation
and tilt was examined in a rotating furnished room. Subjects sat in a stationary chair in the …

The 'reverse-perspective'illusion entails the apparent motion of a stationary scene painted in
relief and containing misleading depth cues. We have found that, using prism goggles to …

Perceiving a direction as “up” is fundamental to human performance and perception.
Astronauts in microgravity frequently experience reorientation illusions in which they, or their …

A number of anomalies have been pointed out in opposition to attempts to account for the
Poggendorff illusion in terms of the expansion of small-or medium-sized acute angles. The …

Observers who lie supine with their heads inverted report large (up to 60°) tilt of a light line in
an otherwise dark room when their heads and/or bodies are tilted. Most observers report that …

The authors argue that changes in the perception of vertical and horizontal caused by local
visual cues can account for many classical visual illusions. Because the perception of …

Tilt invariably involves the factor of displacement. A clockwise rotation of a rod, for example,
results in the top being displaced to the right and the bottom to the left. The question was …