Figure 4.

Test stimuli and results of Experiment 1. (A) Five base-type random-block stimuli with an ambiguous DOF at the center. The black and white regions indicate the distinct motion direction of the RDP. The areas of the black and white regions are equal. (B) Results of Experiment 1, using four participants. The black bars indicate the apparent perception of DOF toward the left with respect to the center for each base-type stimulus (bottom panel). The white bars (above the black bars) represent the perception of DOF toward the right. The black solid and gray dashed contours around the bars indicate that black and white objects, respectively, were attended. Arrows on the bottom panel also present the attention conditions. The regions with attended motion direction were perceived more frequently as figure than were the alternative regions. Error bars represent the standard error. See main text for details.