Table 8.

Performance on Visual Information Processing Tasks

Task			–1 Week (baseline)	0 Week (single dose)	12 Weeks
SDC	Correct responses	Placebo	54.8 ± 8.7	59.3 ± 7.8	59.3 ± 9.8
		Theanine	58.3 ± 6.5	61.5 ± 6.8	63.0 ± 6.0
	Errors	Placebo	0.77 ± 0.95	0.62 ± 1.1	1.29 ± 1.5
		Theanine	0.62 ± 0.85	0.96 ± 1.2	1.04 ± 1.3
NVRT	Correct responses	Placebo	9.3 ± 1.7	9.2 ± 2.3	8.9 ± 2.4
		Theanine	9.9 ± 1.9	9.4 ± 2.4	10.3 ± 1.5
	Average correct reaction time	Placebo	4204 ± 1055	4019 ± 1025	3559 ± 837
		Theanine	4300 ± 1083	4098 ± 1251	4034 ± 597
	Commission errors	Placebo	4.9 ± 2.1	5.5 ± 2.5	5.9 ± 2.4
		Theanine	4.7 ± 2.0	5.4 ± 2.3	4.5 ± 1.6
	Omission errors	Placebo	0.73 ± 0.87	0.35 ± 0.69	0.17 ± 0.38
		Theanine	0.38 ± 0.70	0.15 ± 0.37	0.23 ± 0.59

Values are presented as mean ± SD.