Table 2. Genotype difference in error rates of facial expression identification.

A. Genotype difference in error rates
Error Type	% of Errors: Mean (SD)		T(two tailed)	p
	404AA (n = 88)	404AT (n = 34)
Anger	8.38 (12.78)	10.11 (9.36)	−0.72	0.47
Fear	12.07 (14.67)	7.90 (9.14)	1.54	0.13
Happy	5.75 (9.15)	4.78 (8.71)	0.53	0.59
Neutral	13.14 (14.28)	11.76 (12.94)	0.49	0.63

Although we calculated the error rates for each expression and for combinations of two expressions (e.g. mistaking fear for anger), no significant difference was observed between the two SNPs.