期刊
SOCIAL COGNITIVE AND AFFECTIVE NEUROSCIENCE
卷 8, 期 8, 页码 847-854出版社
OXFORD UNIV PRESS
DOI: 10.1093/scan/nss081
关键词
distributed repetition; recognition memory; emotion; ERPs
资金
- National Institute of Mental Health [P50 MH 72850]
- Attention (CSEA) at the University of Florida
Repetition has long been known to facilitate memory performance, but its effects on event-related potentials (ERPs), measured as an index of recognition memory, are less well characterized. In Experiment 1, effects of both massed and distributed repetition on old-new ERPs were assessed during an immediate recognition test that followed incidental encoding of natural scenes that also varied in emotionality. Distributed repetition at encoding enhanced both memory performance and the amplitude of an old-new ERP difference over centro-parietal sensors. To assess whether these repetition effects reflect encoding or retrieval differences, the recognition task was replaced with passive viewing of old and new pictures in Experiment 2. In the absence of an explicit recognition task, ERPs were completely unaffected by repetition at encoding, and only emotional pictures prompted a modestly enhanced old-new difference. Taken together, the data suggest that repetition facilitates retrieval processes and that, in the absence of an explicit recognition task, differences in old-new ERPs are only apparent for affective cues.
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