Table 9.

Gradient, R² and correlation values between two modalities.

	Gradient	R2	Correlation
EEG vs. blinking rate	−0.0063	0.00004	−0.0061
EEG vs. facial temperature	0.5965	0.3113	0.5579
EEG vs. subjective evaluation	0.1139	0.0085	0.0921
Blinking rate vs. facial temperature	0.1329	0.0166	0.1289
Blinking rate vs. subjective evaluation	0.5952	0.2491	0.4991
Facial temperature vs. subjective evaluation	0.5765	0.2486	0.4986