Motion-induced Appearance Shift Depending on Orientation

[摘要] Recently we show that motion signal from neighboring objects alters brightness and color of both the moving and the stationary objects, and consequently the stationary objects appear different from the moving ones although they are physically identical (Hong & Kang, 2013, 2016). In the current study, we investigated whether this motion-induced appearance shift is affected by spatial structure of the stationary and moving objects. Using memory-based choice task, we measured the appearance of a stationary, vertical bar presented 2-deg away from the central fixation. In the same orientation condition, another vertical bar was orbiting around the stationary bar. In different orientation condition, a horizontal bar was orbiting around the stationary vertical bar. We found that the magnitude of brightness shift was significantly reduced when orientations of stationary and moving bars were perpendicular to each other compared to when orientations of them were identical (both vertical). However, the orientations of stationary and moving bars did not significantly modulate the magnitude of color appearance shift due to contextual motion. We discussed underlying mechanisms mediating this discrepancy between brightness and color appearance shift associated with stimulus motion

[学科分类] 眼科学