The effect of a noise plane on discrimination of mirror symmetry
in a different depth plane.

ABSTRACT

Participants were asked to discriminate between 100% and 50% symmetrical dot patterns (the target plane), both of which were overlaid in depth by a random-dot plane (the noise plane). The results showed that noise in the different depth plane was effectively excluded when the relative binocular disparities between 2 planes were large (8' or more), the target plane was presented in front of the noise plane, and the stimulus duration was long. A simple model based on a grouping process in depth and on a masking effect was applied to the data. The results of application of the model suggest that the visual system uses the output of the grouping process to discriminate 2-dimensional symmetry in 3-D noise.

AUTHOR Yakushijin, Reiko; Ishiguchi, Akira

AFFILIATION Ochanomizu U, Dept of Human & Social Sciences, Tokyo, Japan

SOURCE Journal of Experimental Psychology: Human Perception & Performance.
　　　　 1999 Feb Vol 25(1) 162-173