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Schematic of the target step (A) and countermanding (B) trial types. Top: visual display is schematically illustrated. - - -, imaginary windows within which the monkey is required to maintain gaze. To the right of B, 2 potential outcomes are shown. For the noncancelled trial, →,erroneous saccade to the green target. Bottom: sequence of events is schematized as black bars plotted against time. Modified from Paré and Hanes (2003).
