Table 3.

SNP Heritability of Antisaccade Proportion of Errors from GCTA Analyses

	\tch\Threshold
	.025	.050	.100	None
Unweighted	.433 (.172)	.467 (.167)	.439 (.166)	.503 (.023)
Weighted, all	.540 (.224)	.499 (.216)	.468 (.215)	–
Family C	–	–	–	.502 (.041)

Note. Sample sizes range from 2,045 to 2,112 for the three subsets and equaled 4,469 for the full sample. Point estimates of variance accounted for at each threshold are provided along with standard errors in parentheses. Threshold = the genetic relatedness threshold used for selecting unrelated individuals; None = no threshold was imposed and all subjects were included; Unweighted GRM = raw GRM; Weighted GRM = weights based on LD patterns to discount those SNPs in high LD (Speed, Hemani, Johnson, & Balding, 2012). This is not used in the full sample, because the method was designed for samples of unrelated individuals or samples containing a small number of large pedigrees (Doug Speed, e-mail communication, May 4, 2014). Family C = all subjects while simultaneously modeling shared environmental influences.