Topographic maps for each of the four time windows analyzed (100–300 ms, 300–500 ms, 500–700 ms, and 700–1000 ms). For each time window, the top row displays maps for the higher phonological awareness group (HPA) and the bottom row shows maps for the lower phonological awareness group (LPA). Maps were created based on difference waves: the subtraction of ERPs to rhyming targets from ERPs to nonrhyming targets. For the corresponding difference wave plots, time windows with main effects of Group (at p < .05, but above Bonferroni-corrected p = .025) at central, parietal, and occipital electrode sites are shaded in grey (see Table 3). The difference wave for the LPA group is shown as dashed lines and the difference wave for the HPA group is shown as dotted lines.