Poster Session E, Monday, March 25, 2:30 – 4:30 pm, Pacific Concourse
Pre-trial fluctuations in pupil diameter affect goal-state orienting and accuracy during episodic remembering
Kevin P. Madore1, Anna M. Khazenzon1, Cameron W. Backes2, Anthony D. Wagner1,3; 1Department of Psychology, Stanford University, 2Symbolic Systems Program, Stanford University, 3Wu Tsai Neurosciences Institute, Stanford University
Moment-to-moment interactions between goal states, attention, and episodic memory retrieval may influence when individuals remember and when they forget. We recorded concurrent EEG+pupillometry during an encoding/retrieval paradigm with 80 young adults to examine how (a) multimodal indices of attentional lapses relate to goal-state representation and episodic memory, and how (b) trait differences in media multitasking, attentional control, and related constructs may contribute to these relationships. At encoding, participants performed two tasks, classifying individual objects on either a conceptual or perceptual dimension. At retrieval, participants oriented to one of three retrieval goals (concept before? vs. percept before? vs. new item?) and then viewed an old or new object and made the retrieval judgment. We examined how trial-by-trial tonic fluctuations in pupil diameter (a) before orienting to the retrieval goal and (b) before viewing the object and making the retrieval judgment affect accuracy. Across goal states, fluctuations in pre-trial pupil diameter (1000ms before goal orienting) significantly predicted retrieval performance -– average pre-trial pupil diameter was lower for misses than hits. Moreover, variability in pre-trial pupil diameter (1000ms before viewing the object and making the retrieval judgment) significantly predicted responses across goal states –– variability was higher for false alarms than correct rejections. Higher scores on media multitasking and inattention were significantly negatively related to d’ for each orienting/goal-state condition. Increases in inattention were also related to pronounced pupil-accuracy relationships. These results highlight how preparatory attention and goal-state representation impact episodic remembering.
Topic Area: LONG-TERM MEMORY: Episodic