In the article “Competition for Visual Selection in the Oculomotor System” by David A. Markowitz, Ryan A. Shewcraft, Yan T. Wong, and Bijan Pesaran, which appeared on pages 9298–9306 of the June 22, 2011 issue, the wrong NIH Training Grant number T32 MH19524 (D.A.M.) was cited. The correct NIH Training Grant number is T32 EY007158. The authors regret this mistake.