DNA was collected using buccal swabs and genotyped using TaqMan assays on an OpenArray system (Life Technologies, part of Thermo Fisher Inc.) as described in Cleveland et al. (2015). Five Single Nucleotide Polymorphisms (SNPs) were used to calculate an OXTR genetic risk score (see Table 1). The OXTR risk score combines genetic variants chosen for their empirical relationships with what can be described as negative social behavior and related intrapersonal characteristics (e.g., aggression and low empathy). These SNPs, identified from the literature and searches of the Public Health Genomics Knowledge Base (Yu, Clyne, Khoury, & Gwinn, 2010; Yu, Gwinn, Clyne, Yesupriya, & Khoury, 2008), include rs6770632, rs53576, rs2254298, rs4686302, and rs1488467. We were unable to use the rs6770632 SNP, which has been associated frequently with social behavior (Feldman et al., 2015). However, rs7632287 is in strong linkage disequilibrium with this SNP, indicating that rs7632287 could be used as a proxy (R2 = .95;1000 Genomes Project Consortium, 2012). SNPs were coded so that 2 indicated homozygous for the risk allele (high), 1 indicated heterozygous for risk allele (medium), and 0 indicated
