Poster A73, Saturday, March 24, 1:30–3:30 pm, Exhibit Hall C
Mechanisms Underlying Memory Distortion for Emotional Orthographic Associates with EEG
Nicholas Griffin1, David Schnyer1; 1The University of Texas at Austin
While all people are prone to memory distortion, cognitive biases may differentially affect how memory becomes distorted. Negative attention bias, commonly exhibited in individuals with depressive symptoms, has been shown to increase memory distortion for negative information. Using orthographically associated words in a false memory paradigm, we examined differences in endorsement of emotional memory lures between healthy (HC) and high depressive (HD) symptom groups. In addition, we collected electroencephalography data to investigate neurocognitive mechanisms underlying memory differences between groups. Participants encoded lists of neutral words that were orthographically similar to either neutral or negative critical lures. Then, they completed a recognition memory test including items shown at encoding (old items) and associated critical lures (novel items). The depressive group showed increased hits and false alarms (FA) relative to the control group and quicker overall response times than the control group. Event-related potentials were calculated for hits to old items, and correct rejections (CR) and FA to lure items. Post-hoc, the group was split into high and low FA groups. Examining the FA and CR difference among high FA participants, we found significant interactions between depressive group and valence such that HCs showed more positive amplitude differences for neutral relative to negative lures early in frontal and late in left parietal regions, while HDs showed the opposite pattern. While HC retrieval patterns were consistent with the emotional recognition literature, this suggests that HDs instead use a negatively biased retrieval strategy during familiarity and recollection-related processes when making incorrect item endorsements.
Topic Area: LONG-TERM MEMORY: Semantic