PERCEPTUAL LOCALIZATION OF SURFACE POSITION

In 2 experiments, observers were required to identify corresponding po ints on an object viewed from multiple orientations. On each trial, a surface was presented initially with a single target location marked b y a small dot. Following a brief blank interval, the same surface was presented again at a different orientation. The observer was required to position an adjustable probe dot in this 2nd display to match the l ocation of the target in the Ist view. Under optimal conditions, the v ariance in their settings over multiple trials was just a few minutes of are, though these errors varied significantly with the structural c omplexity of the depicted surface.