The detection of three-dimensional mirror-symmetry.

ABSTRACT

Conducted 2 experiments on the ability of the human visual system to detect 3-dimensional mirror symmetry. Ss were 6 normal Japanese adults. In Exp 1, 2 Ss had to discriminate among 3 kinds of 3-dimensional stimulus patterns: (1) 3-dimensional mirror-symmetrical patterns (3-D symmetry), (2) patterns with mirror symmetry in the frontal plane but not symmetrical with regard to depth (2-D symmetry), and (3) random patterns. In Exp 2, the effects of noise (i.e., asymmetrical constituents of the stimulus display) on the detection of 3-dimensional mirror symmetry were assessed with 4 Ss. The discriminability index and reaction time (RT) were measured in both experiments.

AUTHOR Yakushijin, Reiko; Ishiguchi, Akira

AFFILIATION Ochanomizu U, Tokyo, Japan

SOURCE Japanese Journal of Psychology. 1995 Feb Vol 65(6) 471-478