3.4.2.5. aMMN, P3a, and late positivity. No MMN or P3a response
was observable in either the younger orolder adults’ data. Therewas a
prolonged late positivity in response to the deviant stimuli, beginning
at the P2 peak and lasting for the remainder of the epoch that was
significantly larger among older adults (F [1,44] ¼ 7.32, p ¼ 0.010).