Figure 2.

Mean rms and rms-difference waveforms recorded from good-reader (thick blue lines) and poor-reader (thin red lines) subject groups. Error bars indicate jackknife error estimates of the mean across subjects at each time sample. For clarity, error bars (one-sided) are shown at every fifth time point. Stimulus events are indicated in green. Stars indicate epochs, computed over 90-ms nonoverlapping sliding time windows, that were statistically significant at P < 0.0001. (A) rms waveforms for stimulus pair with 500-ms ISIs. (B and C) rms difference waveforms for stimulus pairs with 100 (B) and 200 (C) ms ISIs. These rms differences were computed for each subject by subtracting the rms for the 500-ms ISI condition from the rms waveforms in the 100- and 200-ms ISI conditions over the first 500-ms poststimulus period. These waveforms reflect the sole contribution of the second stimulus to the response. Stars indicate the center of 90-ms-epoch windows in which differences in the responses to the second stimulus were statistically significant between poor readers vs. good readers at P < 0.0001.