Cognitive inhibition can be operationalized as the rejection of a prepotent or highly practiced response, in favor of a more contextually appropriate or desirable response (Butler and Zacks, 2006). The AST presents participants with a central fixation stimulus on a screen, which is then followed (after a brief temporal gap in the commonly employed AST gap task) by a suddenly appearing visual peripheral stimulus. The correct task response requires participants to avoid the instinctive compulsion to look towards the target, and instead to execute a saccadic eye movement to a position on the screen, equidistant from the center of the screen, but in the opposite horizontal direction to the target (an antisaccade). The AST is thought to comprise several critical components: remembering the rule of the task; inhibiting the prepotent response to look towards the target; translating the spatial location of the target across to its mirror image location; and executing the oculomotor saccade to what is essentially a blank, undefined location. The composite processes necessary for successful AST responses can be fractionated into sub processes reliant predominantly upon WM or IC (Crawford et al., 2011). While these two cognitive mechanisms may be interrelated, the active suppression of the prepotent saccade to the target, and the active fixation upon the spatial location of the end point of the AST (while self-prohibiting further eye or head movements) rely primarily upon the inhibition system. However, the implementation of the rules of the AST, the translation of the spatial location of the target, and subsequent execution of the antisaccade movement rely more heavily upon WM processes.