Table 6. Performance of the alertness prediction models.

Models	Three categories of alertness levels					Two categories of alertness levels
	Precision	Recall	F1 score	Accuracy	AUC	Precision	Recall	F1 score	Accuracy	AUC
SVM	0.64	0.53	0.47	0.53	0.62	0.72	0.73	0.72	0.73	0.65
RF	0.58	0.57	0.53	0.57	0.66	0.74	0.74	0.71	0.74	0.72
XGBoost	0.52	0.52	0.49	0.52	0.65	0.73	0.74	0.73	0.74	0.72
Adaboost	0.49	0.53	0.47	0.53	0.67	0.74	0.75	0.73	0.75	0.77