Figure 4. Results of Experiment 2, comparing the response time to the Kanizsa triangle and to the symmetry control stimulus.

(A) Suppression times for the two types of images plotted for each of the 12 individual observers as well as their averages. The suppression time for the Kanizsa triangle is significantly shorter than that of the control stimulus, p<.05; (B) The advantage of Kanizsa triangle over the symmetry control stimulus, expressed as ΔRT, in the dichoptic suppression condition and in the binocular control condition. Advantage of Kanizsa triangle is significantly larger in the suppresion condion than that in the binocular control condition (629 ms vs. 175 ms, t(11) = 2.559, p<0.05 ).