891431.fig.007a
(a)
891431.fig.007b
(b)
891431.fig.007c
(c)
891431.fig.007d
(d)
Figure 7: Graphical representations of the values at peaks and valleys of EEG vigilance estimators and means and standard deviations (as error bars) of the four performance measures: (a) speed, (b) steer, (c) gas, and (d) brake.