Table 1.

Summary of linear regression statistics for main dependent variables in 18 sessions of NFB.

Measures	Units	t	P-value	R	R2	Regression equation	Power
Gamma	%	2.25	0.039	0.491	0.241	y = 0.022x + 1.45	0.548
Theta/low beta	N/A	−3.57	0.003	0.666	0.444	y = −0.079x + 9.49	0.876
Theta/high beta	N/A	−4.01	0.001	0.708	0.502	y = −0.088x + 6.26	0.928
“Focus Attention” index	C.U.	1.84	0.084	0.418	0.175	y = 0.056x + 73.83	0.408
“40 Hz Gamma” index	C.U.	2.61	0.019	0.547	0.299	y = 0.165x + 42.37	0.662