PROJECTIVE INVARIANCE AND THE KINETIC DEPTH EFFECT

Authors
  1. Niall, K.K.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Seven experiments test the assumption that, in the kinetic depth effect, observers have reliable and direct access to the equivalance of shapes in projective geometry. The assumption is implicit in 'inverse optics' approaches to visual form perception. Observers adjusted a comparison shape to match a standard shape; both standard and comparison were portrayed as in continuous rotation in space, using a graphics computer. The shapes were either plane quadrilaterals or solid prisms.The angular difference of the planes of the shapes was varied, as wasthe dot density of a texture in those planes. Departure from projective equivalence was measured in six studies by measuring the planar analogue of cross ratio, and in a seventh by measuring the cross ratio for points in space. Projective equivalence was not found to be perceived uniformly, except in one experiment that did not involve rotation indepth. TRUNCATED
Date of publication
15 Mar 1992
Number of Pages
42
Reprinted from
Acta Psychologica, vol 81, 1992, p 127-168
DSTKIM No
93-00062
CANDIS No
127317
Format(s):
Hardcopy;Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: