Fig. 2. Response scores (means and standard errors) of self-reported anxiety during experimental days minus comparison day data (raw values depicted for the comparison day). Awake = awakening; Pre = 1 hour before; SitA = quiet sitting; Drive1 = driving outbound leg; Drive2 = driving inbound leg; SitB = quiet sitting. Comparison data (nondriving) was collected at the same times as these epochs on the driving days.

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