Table 6.

Top 20 features used in the best arousal models for the different feature groups.

Benchmark (nof = 15, FS = RFE)	Motif (nof = 16, FS = RFE)	Combined (nof = 17, FS = mRMR)
(α+β)/γ	PE (β)	D m(O1, O2) (θ)
(γ+β)/θ	Tr (β)	DoF (γ)
AI(O1, O2) (β)	C s (β)	k w (θ)
γ/β	D m(T7, T8) (α)	DoF (α)
AI(P7, P8) (γ)	L w (α)	D m(T7, T8) (β)
AI(F3, F4) (β)	D m(FC1, FC2) (α)	D m(P3, P4) (β)
β/θ	PE (θ)	D m(T7, T8) (α)
Spectral power (β)	D m(P7, P8) (γ)	PE (θ)
AI(Cp5, Cp6) (θ)	L w (γ)	D m(F3, F4) (θ)
AI(FC1, FC2) (α)	C w (β)	D m(C3, C4) (γ)
AI(P3, P4) (θ)	D m(C3, C4) (β)	C w (θ)
AI(P3, P4) (β)	C (α)	DoF (θ)
AI(C3, C4) (θ)	D m(Cp1, Cp2) (β)	L s (α)
AI(Cp1, Cp2) (α)	D m(P3, P4) (α)	D m(Fc5, Fc6) (θ)
AI(T7, T8) (γ)	D m(F7, F8) (α)	C w (α)
	k (α)	D m(Fc5, Fc6) (α)
		D m(Fc5, Fc6) (γ)