Motion coherence manipulation in one eye.

<p>A,B: Predominance (A) and mean dominance duration (B) of the ipsilateral (black solid curves) and contralateral (gray solid curves) eye both changed as a function of ipsilateral coherence. Mixed percepts (gray dotted curves) rarely occurred. Noise-like null percepts (gray dashed curves) comprised only ∼10% of the total viewing time, and their mean durations were comparatively short. Data averaged across n = 6 observers. C,D: Mean dominance durations from two individual subjects (S1 and S2) illustrating that observed response patterns ranged from asymmetric (C) to more or less mirror-symmetric (D). Coherence in the contralateral eye was fixed at 20%, which corresponded with 5× the subjects’ 75%-correct motion discrimination threshold for coherence (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0071931#s2" target="_blank">Methods</a>). Error bars indicate ±1 SEM.