Location

Manchester Village, Vermont

Date

29-6-2017

Session

Session 6 — Hybrid Presentations

Abstract

Mind-wandering occurs when individuals experience task-unrelatedthoughts, which can interfere with their performance. The goal of this study was to investigate mind-wandering while driving, as predicted both by time on task, and by individual differences in executive working memory, as measured by the Sustained Attention to Response Task (SART). Participants completed a total of three drives during their hour in the driving simulator. During these drives, participants were periodically asked whether they were thinking of driving; the proportion of trials where they reported they were not thinking of driving was used as an index of mind-wandering. As a secondary index, at the end of each drive, participants also rated how difficult they felt it was to focus during the drive. Driving speed, steering variability, and self-report driving performance were also recorded. As predicted, self-reports indicated that drivers had increased difficulty focusing their attention with time on task, particularly in the last two drives; however, the increase in off-task thoughts per drive did not reach significance. Similarly, although driving speed increased as a function of time-on-task, and SART scores predicted driving speed, the interaction between SART scores and time-on-task did not have the predicted effect on steering variability. Overall, the best predictors of mind-wandering were fatigue and number of hours of sleep the previous night. Lastly, those who reported more mind-wandering also reported more instances of emotional rumination (e.g., worries, feeling guilty).

Rights

Copyright © 2017 the author(s)

DC Citation

Proceedings of the Ninth International Driving Symposium on Human Factors in Driver Assessment, Training and Vehicle Design, June 26-29, 2017, Manchester Village, Vermont. Iowa City, IA: Public Policy Center, University of Iowa, 2017: 326-332.

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Jun 29th, 12:00 AM

Predictors of Mind-Wandering While Driving

Manchester Village, Vermont

Mind-wandering occurs when individuals experience task-unrelatedthoughts, which can interfere with their performance. The goal of this study was to investigate mind-wandering while driving, as predicted both by time on task, and by individual differences in executive working memory, as measured by the Sustained Attention to Response Task (SART). Participants completed a total of three drives during their hour in the driving simulator. During these drives, participants were periodically asked whether they were thinking of driving; the proportion of trials where they reported they were not thinking of driving was used as an index of mind-wandering. As a secondary index, at the end of each drive, participants also rated how difficult they felt it was to focus during the drive. Driving speed, steering variability, and self-report driving performance were also recorded. As predicted, self-reports indicated that drivers had increased difficulty focusing their attention with time on task, particularly in the last two drives; however, the increase in off-task thoughts per drive did not reach significance. Similarly, although driving speed increased as a function of time-on-task, and SART scores predicted driving speed, the interaction between SART scores and time-on-task did not have the predicted effect on steering variability. Overall, the best predictors of mind-wandering were fatigue and number of hours of sleep the previous night. Lastly, those who reported more mind-wandering also reported more instances of emotional rumination (e.g., worries, feeling guilty).