Figure-ground segregation and the determination of the figure direction are the necessary process for the object recognition. We investigated the effect of the feature-based attention for the perception of figure direction through the psychophysical experiment with ambiguous figures which consist of random dot pattern. Subjects were asked to report the figure direction after attending to a direction of motion. They showed the tendency that a region segregated by the attended motion direction is more frequently perceived as figure. This result indicates that feature-based attention plays a critical role to modulate the human perception of figure direction.
