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OXTR rs53576 genotype and gender predict trait gratitude

Abstract Dispositional gratitude was investigated in 190 (96 M, 94 F) participants with saliva samples genotyped for the oxytocin receptor gene single nucleotide polymorphism (SNP) rs53576 (112 A-carriers, 78 GGs). Trait gratitude was measured using the Gratitude Questionnaire-6 (GQ-6), and trait empathy was assessed with the Interpersonal Reactivity Index (IRI Perspective Taking and Empathic Concern). Due to non-normal distributions of the GQ-6 by SNP group and by gender, non-parametric analyses using simulations and bootstrap 95% CIs were conducted. Results show main effects of SNP group (with GGs scoring higher than A-carriers) and gender (with females scoring higher than males) on trait gratitude. Given the associations of both the OXTR SNP rs53576 and gender with empathy, and the prosocial associations of trait empathy and gratitude, we tested an indirect effects model using PROCESS. Results showed that both SNP group and gender had an indirect effect on trait gratitude through trait empathy.