Figure/ground segregation from temporal delay is best at high spatial frequencies.
Two experiments investigated the role of spatial frequency in performance of a figure/ground segregation task based on temporal cues. Figure orientation was much easier to judge when figure and ground portions of the target were defined exclusively by random texture composed entirely of high spatial frequencies. When target components were defined by low spatial frequencies only, the task was nearly impossible except with long temporal delay between figure and ground. These results are inconsistent with the hypothesis that M-cell activity is primarily responsible for figure/ground segregation from temporal delay. Instead, these results point to a distinction between temporal integration and temporal differentiation. Additionally, the present results can be related to recent work on the binding of spatial features over time.
Kojima
H
H
Department of Psychology, Ritsumeikan University, Kyoto, Japan. kojima@ctrvax.vanderbilt.edu
D000328:Adult; D003463:Cues; D004192:Discrimination, Psychological; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology; D011601:Psychophysics; D013997:Time Factors