Table 3.

Total number of intervals identified as “stress” (in %) for each classifier and each subject in the two driving situations. The numeric difference between them (with traffic–no traffic) is also displayed.

SVM
Subject	1	2	3	4	5	6	7	8	9	10	Mean (%)
$\% “1” \mathrm{Traffic}$	48.18	54.40	43.67	36.78	53.23	77.04	66.39	92.13	66.12	50.71	58.86
$\% “1” \mathrm{No\; traff}.$	16.67	49.62	47.01	60.87	38.66	6.50	33.87	9.24	24.58	56.10	34.31
$\% “1” \mathrm{Diff}.$	31.51	4.78	−3.34	−24.09	14.57	70.53	32.52	82.88	41.54	−5.38	24.55
RF
Subject	1	2	3	4	5	6	7	8	9	10	Mean (%)
$\% “1” \mathrm{Traffic}$	54.74	58.40	48.10	44.83	55.65	74.81	76.23	92.13	71.07	52.86	62.88
$\% “1” \mathrm{No\; traff}.$	24.51	56.49	47.01	66.96	25.21	2.44	45.16	19.33	31.36	73.17	39.16
$\% “1” \mathrm{Diff}.$	30.23	1.91	1.09	−22.13	30.44	72.38	31.07	72.80	39.72	−20.31	23.72
DT
Subject	1	2	3	4	5	6	7	8	9	10	Mean (%)
$\% “1” \mathrm{Traffic}$	51.09	52.00	46.84	41.38	62.90	77.04	69.67	85.83	60.33	45.00	59.20
$\% “1” \mathrm{No\; traff}.$	27.45	52.67	47.01	63.48	46.22	10.57	33.06	15.97	37.29	59.35	39.31
$\% “1” \mathrm{Diff}.$	23.64	−0.67	−0.17	−22.10	16.68	66.47	36.61	69.86	23.04	−14.35	19.90