OXTR and Trust

This study looking at 108 adult (human) males found a reliable association between a SNP (G) in the OXTR gene and trust behavior. Individuals homozygous (G/G) for the SNP exhibited greater trust behavior as compared to heterozygous (G/A) or homozygous for A (A/A). It's unclear what functional effect this SNP may have and more research on how OXTR interacts with other genes/environment will be necessary to make this a robust relationship.