Mislocalization of a target toward subjective contours: attentional modulation of location signals.
This study examined whether a briefly presented target was mislocalized toward a subjective contour. Observers manually reproduced the position of a briefly presented peripheral target circle above a central fixation cross. A luminance contour, a subjective contour, or a no-contour stimulus was presented in either the left of right visual field, and a no-contour control was presented in the opposite visual field. After these stimuli vanished, a target circle was then presented. Consequently, the degree of mislocalization toward the subjective and luminance contours was the same; this indicated that image integration at a coarse spatial scale cannot explain mislocalization. Experiment 2 revealed that the mislocalization in Experiment 1 was not a result of eye movements. Experiment 3 found that the spatial attention allocated at the location of the luminance and subjective contours was more than that allocated at the no-contour stimulus. An attentional shift toward the task-irrelevant stimulus resulted in a mislocalization of the target.
Yamada
Yuki
Y
Department of Behavioral and Health Sciences, Graduate School of Human-Environment Studies, Kyushu University, Higashi-ku, Fukuoka-city, 8128581, Japan. yy@psycho.hes.kyushu-u.ac.jp
Kawabe
Takahiro
T
Miura
Kayo
K
D001288:Attention; D005403:Fixation, Ocular; D005556:Form Perception; D006801:Humans; D017603:Signal Detection, Psychological; D013028:Space Perception