Spatio-temporal parameters and the three-dimensionality of apparent motion: evidence for two types of processing.
The minimum ISI required for perceiving apparent motion in depth was measured as a function of the 2D separation of stimuli and the physical separation of stimuli in depth. It was found that temporal thresholds increased as a function of the separation of stimuli in depth. This supports the results of previous research indicating that the perceived three-dimensionality of apparent motion in depth increases with ISI. In addition, the rate of threshold increase was significantly greater in displays with short 2D separations of stimuli than in displays with large 2D separations. This robust functional dissociation of thresholds indicates that the short-range system may be involved in the processing of apparent motion in depth in the former case.
Wright
R D
RD
Centre for Cognitive Science, University of Western Ontario, London, Canada.
Dawson
M R
MR
Pylyshyn
Z W
ZW
D003867:Depth Perception / Q000502:physiology; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D014795:Visual Pathways