Before revision:  The LPC of learners increased with response accuracy whereas their N1 amplitude after learning increased with between-category separation  . Non-learners showed no significant changes in dissimilarity judgments, LPC or N1, within or between categories.
After revision:  The LPC of learners increased with response accuracy whereas their N1 amplitude decreased with between-category separation . Non-learners showed no significant changes in dissimilarity judgments, LPC or N1, within or between categories.