Poster D25, Monday, March 27, 8:00 – 10:00 am, Pacific Concourse
Neural Processing of Gender Stereotypes Separate Liberals and Conservatives
Adam Baker1, Travis Baker2, Genevieve Fuji Johnson3, Mario Liotti4; 1Simon Fraser University, 2Rutgers University
Abstract: Recent research has begun to utilize event-related potentials (ERPs) to investigate social phenomena, such as social norm violations. Here, we continue this work by using electrophysiological and behavioral assays of pragmatic rule violations to identify neurocognitive differences between individuals identified through survey measures as conservative (n=15) or liberal (n=15). To assess the influence of automatic vs. controlled processing of stereotype violations between groups, a short (150ms) and long (700ms) stimulus-onset asynchrony (SOA) was utilized. Behaviorally, RT was longer for Incongruent trials in the Conservative group only at 700 ms compared to 150 ms. ERP results confirmed that participants as a whole (n=30) produced greater N400 activity to gender stereotype word-pair incongruities (Female + Mechanic), compared to congruities (Male + Beer). However, while in the short SOA condition, N400 voltage to incongruent word pairs was significantly larger then to congruent word pairs in both groups, in the long SOA condition, the N400 amplitude was significantly larger for Incongruent than Congruent word pairs for the Conservatives only, while it was much smaller and non-significant among Liberals (Congruency*SOA*Group: F(1, 28) = 4.55, p < .05, η2 = .14. ). In addition, scores in the self-identity questionnaire in the conservative group correlated significantly with the RT interference effect, but only for the short SOA, where the stereotype response is more prepotent. We suggest that in the Long SOA conservatives use deliberate processing of the Incongruent words through conflict monitoring mechanisms resulting in longer RT and smaller N400 difference with Congruent words.
Topic Area: EMOTION & SOCIAL: Emotion-cognition interactions