While fixation location and visual attention coincide when we are processing a fixated word, they may become decoupled when processing of that word is complete. While the eyes remain fixation on the current word attention can nonetheless shift to the upcoming word (located parafoveally, but within the perceptual span) so that processing of this parefoveal word can being. This preprocessing prior to actual fixation will facilitate foveal processing following a saccade to that word, giving rise to a preview benefit. Preview benefit is measured using a gaze – contingent boundary paradigm (Rayner, 1975), in which an initial preview of target word is replaced with the word itself when the subject’s eyes cross an invisible boundary during the saccade to the target (note that, because the display change occurs during the saccade, when vision is largely suppressed, subjects generally fail to notice it; Slattery etal., 2011). The preview may be identical to the target or may be a non-identical letter string. During reading, this preview benefit, defined as the reduction in foveal viewing time of the target following as identical vs. a non-identical preview, is about 30-50 ms (for review, see Rayner, 1998, 2009; Schotter et al., 2012).