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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: J Cogn Neurosci. 2012 Mar 8;24(6):1371–1381. doi: 10.1162/jocn_a_00225

Figure 4.

Figure 4

Eye movement traces illustrating the effect of methylphenidate on premature responses in the memory saccade task with 6-sec delay. Vertical components of eye movements to a target presented at (0°, 20°) 300–600 msec after the subject acquired the fixation LED from a control and a 3 mg/kg methylphenidate session. (A) Schematic diagram of the memory saccade task. (B) Eye movements from the control session. Successful trials are plotted in black, and trials in which the subject responded prematurely, thus violating the temporal criterion, are plotted in red. (C) Eye movements from the 3 mg/kg methylphenidate session. Premature responses were eliminated. The single red trace represents an error due to an inaccurate response as the final gaze position landed outside the acceptance window for success.