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  1. Sex differences in the neural and behavioral response to intranasal oxytocin and vasopressin during human social interaction.

    Psychoneuroendocrinology 39:237 (2014) PMID 24157401 PMCID PMC3842401

    We reported effects of intranasal OT and AVP on behavior and brain activity of human males as they played an interactive social game known as the Prisoner's Dilemma Game. Here, we present findings from an identical study in human females, and compare these with our findings from males. Overall, we f...
  2. Effects of intranasal oxytocin and vasopressin on cooperative behavior and associated brain activity in men.

    Psychoneuroendocrinology 37(4):447 (2012) PMID 21840129 PMCID PMC3251702

    We investigate the impact of intranasally administered oxytocin (OT) and vasopressin (AVP) on behavior and brain activity among men in the context of an iterated Prisoner's Dilemma game, which models a real-life social situation. fMRI results show that, relative to both AVP and placebo, OT increases...
  3. Testicular volume is inversely correlated with nurturing-related brain activity in human fathers.

    PNAS 110(39):15746 (2013) PMID 24019499 PMCID PMC3785737

    We tested this hypothesis by measuring aspects of reproductive biology related to mating effort, as well as paternal nurturing behavior and the brain activity related to it. Both plasma testosterone levels and testes volume were independently inversely correlated with paternal caregiving. In respons...