Table 1.

Descriptive information and statistics about risk-taking behavior and electrophysiological activity during the gambling paradigm, dependent on genetic polymorphisms in DAT1, COMT val158met, and 5HTTLPR

		DAT1		COMT val158met		5HTTLPR
		9R-Carriers	10/10	met/met	val-Carriers	s-Carriers	1/1
	N	23	37	16	41	37	17
Risk Taking
% Risky Choices	M ± SD	62 ± 18	53 ± 21	59 ± 16	55 ± 21	53 ± 22	62 ± 12
	F	2.88		1.24		2.63
	p	.095		.52		.11
	η2	.047		–		–
% Risky Choices Post Loss	M ± SD	64 ± 19	53 ± 22	60 ± 17	55 ± 22	54 ± 23	59 ± 17
	t	1.89		0.82		0.74
	p	.064		.41		.47
	d	.39		–		–
% Risky Choices Post Gain	M ± SD	60 ± 20	54 ± 21	57 ± 19	56 ± 21	52 ± 22	64 ± 11
	t	1.10		0.31		4.82
	p	.28		.76		.008
	d	–		–		.69
FRN
Loss – Gain FRN (μV)	M ± SD	3.80 ± 2.49	2.20 ± 2.27	3.09 ± 3.21	3.09 ± 3.21	3.36 ± 2.64	1.84 ± 1.85
	F	6.31		0.11		4.51
	p	.015		.74		.039
	η2	.101		–		.083
Loss FRN (μV)	M ± SD	4.04 ± 2.28	2.49 ± 3.46	2.30 ± 2.40	3.19 ± 3.21	3.52 ± 2.93	1.50 ± 2.78
	t	2.05		0.99		2.37
	p	.046		.33		.022
	d	.615		–		.707
Gain FRN (μV)	M ± SD	0.24 ± 2.73	0.29 ± 3.51	–0.79 ± 2.93	0.35 ± 3.01	0.16 ± 3.13	–0.35 ± 2.83
	t	0.07		1.28		0.56
	p	.95		.21		.58
	d	–		–		–
Feedback P3
Loss – Gain P3 (μV)	M ± SD	–1.25 ± 2.30	–1.32 ± 2.84	–1.65 ± 2.62	–1.01 ± 2.63	–1.30 ± 2.77	–1.11 ± 2.46
	F	0.01		0.82		0.06
	p	.92		.42		.81
	η2	–		–		–
Loss P3 (μV)	M ± SD	12.13 ± 6.30	10.62 ± 4.37	13.43 ± 5.99	10.26 ± 4.61	11.12 ± 4.78	11.73 ± 6.20
	t	1.07		2.11		0.39
	p	.29		.040		.70
	d	–		.59		–
Gain P3 (μV)	M ± SD	13.38 ± 6.75	11.94 ± 4.99	15.08 ± 6.09	11.27 ± 5.20	12.42 ± 5.82	12.84 ± 5.89
	t	0.92		2.34		0.24
	p	.36		.023		.81
	d	–		.67		–