The influence of figure-ground organization on saccadic eye-movements T Ghose1, J Wagemans2 |
|---|
1Perceptual Psychology, University of Kaiserslautern, Germany |
| Previous research [Ghose, Hermens & Wagemans, ECVP 2012; VSS, 2012] suggested that saccade latencies can be used as an indirect measure of the strength of perceptual grouping. Research on figure-ground organization has shown that cues that bias a region to be figural e.g., Convexity, Familiarity and presence of 3D-convexity and Extremal-Edges, differ in relative strength [Ghose & Palmer, JOV 2010]. In this study we measure whether the time to initiate a saccade to a target was slower when it appeared in a location incongruent rather than congruent with a bipartite display with one side biased by a figural cue. We found that of the cues tested only 3D-convexity-with-no-Extremal-Edge resulted in a significant difference in the saccadic latencies for congruent and incongruent conditions. Cues such as Convexity, Familiarity, and Extremal-Edges did not lead to significant differences. The pattern of results did not change even when there were a few 3D-convex distractor images on the display in addition to the bipartite figure-ground image. The results indicate that the strength of figural bias does not affect implicit eye-movement measures and probably additional processing happening in-between the first saccade to the image and the manual response leads to the strength differences reported previously. |
| Up Home |
|---|