Table 6. Accuracies obtained by a combination of two features (0~15 sec window, Subject 2).

Features	M*	skew	kurt	SS	NoP	SoP	P
M	90.1	91.4	91	90.5	94.2	93.4	94.5**
M*	-	50.9	51.2	50.1	52.7	72.2	92.2
skew	-	-	51.1	51.4	52.5	73.4	91.5
kurt	-	-	-	50.3	53.5	72.8	90.7
SS	-	-	-	-	52.5	74.7	92.1
NoP	-	-	-	-	-	72.6	91.6
SoP	-	-	-	-	-	-	92

* The features calculated using ∆HbR signals.

** The highest accuracy obtained.