Poster F87, Tuesday, March 28, 8:00 – 10:00 am, Pacific Concourse
Attentional Focusing at Encoding Contributes to Subsequent Memory
Benjamin R Geib1, Roberto Cabeza1, Marty G Woldorff1; 1Duke University
It has long been known that attention is an important contributor to long-term memory. The specific effects of attention on each of the multiple perceptual and semantic operations that lead to subsequent memory are still unclear. In the event-related potentials (ERP) literature, subsequent memory has been typically associated with a positivity around 600-800 ms known as difference-due-to-memory (DM). However, attention enhances perceptual processes occurring before 600 ms and hence, it should promote encoding before the classic DM effect. In a novel ERP paradigm, we investigated early memory-enhancing effects of attention using lateralized attentional-orienting task which was then followed by a subsequent memory test. Our preliminary results suggest that, at encoding, both the initial attentional allocation toward the target (as indexed by the N2pc ERP component, latency 225-275 ms) and the subsequent extended discrimination of the target features (as indexed by the SPCN ERP component, latency 350-450 ms, and lateralized alpha-band EEG modulation, latency 300-600 ms) contribute to subsequent memory success. These results therefore suggest that prior to the traditional DM effect, there are earlier subsequent memory effects associated with attentional focusing.
Topic Area: LONG-TERM MEMORY: Episodic