Table 2

Comparisons between the three groups in exploratory phase: fail, indeterminate and pass

ParametersFail (n=13), mean (SD)Indeterminate (n=18), mean (SD)Pass (n=41), mean (SD)One-way ANOVABonferroni's multiple testing correction: is p<0.05?
p ValueFail vs indeterminateFail vs passIndeterminate vs pass
SDLP 30.66 (0.2)0.44 (0.13)0.37 (0.08)<0.001YesYesNo
HFS 30.37 (0.09)0.26 (0.06)0.27 (0.07)<0.001YesYesNo
TTC 31.97 (1.69)5.84 (3.34)6.67 (4.9)0.002YesYesNo
Hw1s 329.6 (28.9)17.5 (16.2)13.5 (13)0.296NoNoNo
Hw 30.21 (0.23)0.393 (0.21)0.57 (0.24)<0.001NoYesYes
Speed 365 (8)67 (3)67 (3)0.535NoNoNo
VeerRT (s)2.3 (0.78)1.68 (0.33)1.38 (0.25)<0.001YesYesYes
BrakeRT (s)3.6 (0.6)3.5 (0.9)2.2 (0.6)<0.001NoYesYes
  • BrakeRT, reaction time at the brake event; HFS 3, mean of HFS in epoch 3; Hw 3, minimum headway in epoch 3; Hw1s 3, percentage of time spent with headway under 1 s in epoch 3; SDLP 3, mean SDLP in epoch 3; Speed 3, mean speed in epoch 3; TTC 3, mean of TTC in epoch 3; VeerRT, reaction time at the veer event.