We also measured each participant’s social proficiency (the opposite of autistic-like tendency) with the Autism Spectrum Quotient (AQ) (Baron-Cohen et al., 2001), in view of the positive association between social proficiency and endogenous oxytocin level (Koven and Max, 2014; Lancaster et al., 2015; Parker et al., 2014) and research showing that individual differences in social proficiency or AQ score can moderate the effects of exogenously administered oxytocin (Bartz et al., 2019; Bartz et al., 2010; Bartz et al., 2011). The gene discussed is OXT; the disease is autism.