A Computationally Efficient Method for Hybrid EEG-fNIRS BCI Based on the Pearson Correlation

Table 1

Correlation coefficient [32].

Strength of association	Coefficient,
	Positive	Negative
Small	0.1 to 0.3	-0.1 to -0.3
Medium	0.3 to 0.5	-0.3 to -0.5
Large	0.5 to 1.0	-0.5 to -1.0