Table 1.

t test of electroencephalogram frequency.

Frequency and game		Meana	t test	P value
Delta			0.60	.57
	Lifeguard	13.73
	Tetris	16.50
Theta			1.06	.32
	Lifeguard	3.94
	Tetris	5.00
Alpha			0.91	.39
	Lifeguard	2.80
	Tetris	3.37
Beta			0.29	.78
	Lifeguard	3.40
	Tetris	3.68
Gamma			−0.86	.41
	Lifeguard	3.73
	Tetris	5.23

^aMean: all the values indicate average power calculated.