Table 5.

Correlation analysis on each subject for the influence of acquisition time.

Trend	Model	Subj.1	Subj.2	Subj.3	Subj.4	Subj.5
day1 as Validation dataset	LDA	0.9881	0.9995	0.9929	0.9815	0.9865
	PNN	0.9916	0.9996	0.9736	0.9697	0.9938
day2 as Validation dataset	LDA	0.9884	0.9837	0.9581	0.9772	0.9620
	PNN	0.8750	0.9627	0.9940	0.9812	0.9913
day3 as Validation dataset	LDA	0.9960	0.9987	0.9289	0.9996	0.9984
	PNN	0.9941	0.9960	0.9515	0.9907	0.9869