Copyright © American Speech-Language-Hearing Association From: An Electrophysiological Study of Infants' Sensitivity to the Sound Patterns of English Speech J Speech Lang Hear Res. 1998;41(4):874-886. doi:10.1044/jslhr.4104.874 Legend: ERPs recorded from the left hemisphere of one subject. Stimulus onset at 300 ms, shown by the arrow. P1, N1, P2, and N2 are positive and negative AEP peaks. These ERPs are representative of the morphology of the responses seen in all babies. Peak-to-peak amplitudes were computed for N1 to P2 (Peak 2), P2 to N2 (Peak 3), and N2 to P3 (Peak 4); (a) Baseline condition, (b) Unmodified condition, (c) Modified condition. Date of download: 11/6/2017 Copyright © American Speech-Language-Hearing Association