Figure 2.

Drivers suppress eyeblinks in relation to car acceleration

(A and B) Upper: Driver A, middle: Driver B, and lower: Driver C. (A) Two-dimensionally estimated density of vehicle acceleration by three drivers throughout driving (left) and at eyeblink timing (right). (B) Eyeblink frequency (number of eyeblinks generated/number of samples in each acceleration Region 1–3) during faster laps. We normalized eyeblink frequency to each driver’s eyeblink frequency in Region 3.

(C) Ten representative examples of two-dimensionally estimated density of vehicle acceleration (shift from −0.45 to 0.45) at the eyeblink timing of Driver B, which corresponds to the right middle figure in A.

(D) Empirical cumulative distribution functions in each acceleration direction from data obtained in fast laps at the Fuji course for the three drivers. The solid black lines indicate actual data. Blue lines indicate surrogate data. Asterisks indicate statistically significant differences between conditions using the notation: ∗∗ for p < 0.01 and ∗∗∗ for p < 0.001.