Abstract

We investigated the time course of texture segregation processes by using the method of cued response to obtain speed-accuracy tradeoff (SAT) functions for various psychophysical tasks and texture patterns. SAT functions were obtained by requiring subjects to respond within 200 or 300 ms after an auditory cue. The cue occurred from 0 to 750 ms after the onset of the pattern (which was 50 ms in duration). Response accuracy and reaction time were recorded. We employed several psychophysical tasks, such as discrimination between uniform texture fields and texture fields in which a rectangular patch of texture was embedded. We found that response accuracy, as a function of response signal delay, depended on the task. We also presented a variety of texture patterns, including some that have been used to investigate simple (first-order) versus complex (second-order) mechanisms. We found that the shape of the SAT function depended on the spatial characteristics of the texture patterns.

© 1992 Optical Society of America