“…Our first specific hypothesis was that we would find four components in the LPC range in this classic habituation paradigm: P3a, P3b, nP3, and SW. Our PCA over a temporal epoch from 90 to 470 ms (derived from the grand mean ERP morphology spanning from N1 to the classic SW) decomposed the ERP into a series of components identified (in temporal order) as N1–3, N1–1, PN, P2, P3a, P3b, nP3, +SW, and −SW. The early components up to P2 are broadly similar to previous components reported from habituation (e.g., MacDonald & Barry, ,: MacDonald et al, ) and Go/NoGo paradigms (e.g., Barry & De Blasio, ; Barry, De Blasio, & Cave, ; Barry, De Blasio, Fogarty, et al, ; Borchard, Barry, & De Blasio, ) but showed little systematic variation over trials and are not discussed further. The P3a, P3b, nP3, and +SW components mirror findings from Barry et al (), Barry et al (), MacDonald and Barry (, ), MacDonald et al (), and Rushby and Barry ().…”