 Recent accounts have taken binocular rivalry as resulting from processes at multiple levels (Wilson 2003; Freeman 2005; Tong, Meng, &amp; Blake 2006). For example, when the two competing stimuli have parts that can be fused into a coherent stimulus, as when half of a picture is presented to each eye, the subject can perceive the fusion, integrating content from each eye (Kovács et al. 1996; Ngo et al. 2000). This suggests that binocular rivalry can be sensitive to global properties of the stimulus (see Baker &amp; Graf 2009). What unifies the mechanisms, perhaps, is the function of resolving a conflict generated by the stimuli.