We investigated the combined effects of perceptual grouping cues (proximity and contour closure/proximity and orientation similarity) on object representation, using motion-induced blindness, a phenomenon in which salient visual stimuli perceptually disappear when surrounded by moving patterns. We presented as visual targets two stimuli in which a solid square was embedded in an outlined square. Participants reported whether the targets disappeared independently or simultaneously. The results showed that a relatively high proximity cue (with a 0.2-deg separation between the targets) modulated the perceptions of the independent or simultaneous disappearances of targets, regardless of other grouping cues. The contour closure cue modulated these disappearances in the 0.4- to 0.8-deg separations. Finally, the orientation similarity cue began to modulate these disappearances in the 0.6- to 0.8-deg separations. We suggest that the separation between the visual stimuli modulates the combined effects of perceptual grouping cues on complete object representation.（運動誘発盲を利用して、組み合わされた知覚的群化手がかり（近接と閉合、近接と方位の類似性）が物体知覚に与える影響を検討した。その結果、ターゲット間の距離が視角0.2度では近接の手がかりが、0.4度では閉合の手がかりが、そして0.6度では方位の類似性が最も影響した。これらの結果から、視覚刺激の間の距離が知覚的群化手がかりの組み合わせ的効果を変容させることが分かった。）
総p.11, 72, pp.387-397
Michiaki Shibata, Yousuke Kawachi, Jiro Gyoba.
