Poster D60, Monday, March 26, 8:00-10:00 am, Exhibit Hall C
Self-Focus Encoding Increases Non-Diagnostic Recollection and the LPC Event-Related Potential
P. Andrew Leynes1, Cristina Nardini; 1The College of New Jersey, 2The College of New Jersey
Prior work using word stimuli uncovered evidence that encoding focus (i.e., self-focus or other-focus) altered non-diagnostic recollection and the putative ERP correlate of recollection (i.e., the Late Positive Component, LPC; Leynes & Mok, 2017, Brain & Cognition). The present study examined the generality of these effects by using picture stimuli and varying the emotional encoding aspects. Participants studied product images presented with either a blue or yellow filter. Participants judged whether they liked the product in the self-focus encoding condition, whereas they judged the color of the picture filter in the other-focus encoding condition. At test, participants made source judgments regarding the filter color of the studied image. Both the behavioral and ERP data replicated previous research that indicated encoding focus altered the amount of diagnostic recollection. Self-focus encoding produced more positive encoding ERPs, greater recognition measures, and a greater LPC amplitude. Relative to self-focus encoding, Other-focus encoding led to equivalent source memory, a greater FN400 component (the neural correlate of familiarity), and a smaller LPC amplitude. This evidence suggests that the LPC tracks non-diagnostic recollection, and emotion is not necessarily the factor that drives encoding focus effects as some have suggested. Additionally, source judgments appeared to be based on familiarity following other-focus encoding presumably because attending to the filter color increased unitization of visual features. These findings indicate that small differences in encoding processes can produce detectable changes in familiarity, diagnostic recollection, and non-diagnostic recollection.
Topic Area: LONG-TERM MEMORY: Episodic