The event-related potential (ERP) data reported here in 2005 by Parker, Nelson, and The Bucharest Early Intervention Project Core Group were collected in Bucharest, Romania, between April 2001 and November 2003. We recently discovered that during a 4-month period (July–October 2001) the channel for the right mastoid electrode (M2) was mistakenly exchanged with the channel for the right occipital electrode (O2) at the connection to the amplifier. This Erratum presents the key comparisons between the results as originally reported and as reanalyzed given the corrected data.