Poster B34, Sunday, March 26, 8:00 – 10:00 am, Pacific Concourse
Differential conflict adaptation between cognitive control and sentence comprehension versus production
Malathi Thothathiri1, Daniel Evans1; 1The George Washington University
Competition between representations occurs during both language comprehension and production. Cognitive control assists competition resolution across different domains. Using a conflict adaptation paradigm, we investigated whether cognitive control plays a causal role in competition resolution during sentence comprehension and production. Stroop and sentence trials were pseudorandomly intermixed. Critical trial pairs consisted of congruent (C) or incongruent (I) Stroop trials followed by congruent (C) or incongruent (I) sentence trials, resulting in four conditions (CC, IC, CI, II). Conflict adaptation would be demonstrated by finding that triggering cognitive control on a previous incongruent Stroop trial influences a subsequent incongruent sentence trial (a previous x current trial type interaction). In the comprehension experiment, participants (N=24, Mage=18.9) heard congruent and incongruent sentences and selected a matching picture out of 4 options (C: The rabbit was chased by the fox; I: The fox was chased by the rabbit). Looks to different pictures were modulated by the previous Stroop trial, demonstrating conflict adaptation (Participants: t(23)=-3.28, p<.01. Items: t(17)=-3.04, p<.01). In the production experiment, participants (N=24, Mage=18.7) described congruent and incongruent scenarios. We detected lower accuracies, longer latencies and longer durations for descriptions of incongruent than congruent scenarios (all p’s<.05), but these effects as well as eye movements were not modulated by the previous Stroop trial. Individual differences in conflict resolution during production did not correlate with Stroop performance (Skipped Pearson r=-.05) but did correlate with Number-Letter task-switching performance (r=.42). Thus, sentence comprehension and production may differentially recruit different control functions such as inhibition and switching.
Topic Area: EXECUTIVE PROCESSES: Goal maintenance & switching