Zhang Y; Weiner, VS; Slocum, WM; Schiller PH
Visual Neurosci, 24(2), 207-15.
Abstract
A stimulus display was devised that enabled us to examine how effectively monkeys
and humans can process shading and disparity cues for depth perception. The
display allowed us to present these cues separately, in concert and in conflict
with each other. An oddities discrimination task was used. Humans as well as
monkeys were able to utilize both shading and disparity cues but shading cues
were more effectively processed by humans. Humans and monkeys performed better
and faster when the two cues were presented conjointly rather than singly. Performance
was significantly degraded when the two cues were presented in conflict with
each other suggesting that these cues are processed interactively at higher
levels in the visual system. The fact that monkeys can effectively utilize depth
information derived from shading and disparity indicates that they are a good
animal model for the study of the neural mechanisms that underlie the processing
of these two depth cues.