Contrast manipulation in both eyes.

<p>Predominance (A) and mean durations (B) of exclusive (black solid curves), mixed (gray dotted curves) and null (gray dashed curves) percepts as a function of stimulus contrast (in % Michelson) in the two eyes. Data are pooled across both eyes (exclusive percepts), and averaged across n = 5 subjects. Error bars indicate ±1 SEM as computed from the ANOVA sum of squares <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0071931#pone.0071931-Loftus1" target="_blank">[47]</a>.