Figure 4: MRCPs modulate as a function of reaction time.(A-B) Statistical cluster plot illustrating scalp locations in which statistically significant differences were observed across four levels of RT binning (fastest 25%, middle 25-50%, middle 50-75%, and slowest 25%) in TD participants (A) and ASD participants (B). (C-E) Representative electrodes showing modulation by RT for TD participants (left) and the corresponding electrode for ASD participants (right). Shaded regions surrounding waveforms indicate standard error of the mean. Gray bars indicate statistical differences. (C-D) Left frontal electrode F5 for TD (C) and ASD (D). (E-F) Right frontal electrode F4 for TD (E) and ASD (F). (G) Scalp topography plotted separately for TD (left) and ASD participants (right) averaged over the timewindow from 150 ms to 100 ms before the button press. Topographies were stratified by RT bin (rows) from fastest (top row) to slowest (bottom row). (H) Average scalp topographies constructed over the timewindow from 75 ms to 25 ms before the button press. (I) Statistical cluster plot illustrating significant between group differences between ASD and TD participants separately for each RT bin. (J) Average scalp topographies constructed over the timewindow of 0 to 50 ms after the button press.