ERP old/new effects at different retention intervals in recency discrimination tasks.
Recognition memory studies have suggested that event-related brain potentials (ERPs) may tap into several different memory processes. In particular, two ERP components have been hypothesized as related to familiarity (FN400 old/new effect, 300-500 ms, anterior) and recollection processes (parietal old/new effect, 400-800 ms, posterior). The functional significance of the FN400 old/new effect is uncertain because similar old/new differences have been shown to disappear at moderately long retention intervals. The present study investigated the effects of retention interval (34 min, 39 min, or 1 day) on the FN400 and parietal old/new effects in two different recency discrimination tasks. The results suggest that the FN400 old/new effect can be maintained across 1-day retention intervals, so it may index brain processes capable of contributing to long-term memory.
Curran
Tim
T
Department of Psychology, University of Colorado, Campus Box 345, Boulder, CO 80309-0345, USA. tcurran@psych.colorado.edu
Friedman
William J
WJ
D000704:Analysis of Variance; D004192:Discrimination, Psychological / Q000502:physiology*; D005071:Evoked Potentials / Q000502:physiology*; D006801:Humans; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time / Q000502:physiology*; D012153:Retention, Psychology / Q000502:physiology*; D013997:Time Factors