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Measuring Inhibitory Control in Driver Distraction

Driver distraction research primarily focuses on voluntary distraction. Little known research explicitly evaluates driver susceptibility to involuntary distractions. This paper investigates the relationships between glance behavior in response to irrelevant stimuli in a driving simulator and measures of inhibitory control assessed through a modified flanker task. Overall, inhibitory control appears to be a mechanism that relates to number of glances and average glance duration. Data from 16 participants show that smaller flanker compatibility effects (i.e., better inhibitory control) are significantly associated with fewer glances and shorter average glance durations to irrelevant stimuli in the simulator. No significant relation was found between time fixation on the irrelevant stimulus after its onset and the size of the flanker compatibility effect.