Growth functions of electrophysiology measures (P1, N1, P2, N2, and area) as a function of group at an 80-dB signal level. Peak latencies (left) are generally similar across group, while peak amplitudes (right) for YNH (solid black) are generally larger than ONH (dashed red) and OHI (dotted blue) groups, except for N1 amplitude in which OHI appears to have a larger peak than ONH, similar to YNH.