publication venue for Cooperation: The roles of interpersonal value and gratitude 2017 Benefit valuation predicts gratitude 2017 Facial averageness and genetic quality: testing heritability, genetic correlation with attractiveness, and the paternal age effect 2016 A test of the facultative calibration/reactive heritability model of extraversion 2015 No relationship between intelligence and facial attractiveness in a large, genetically informative sample 2015 Intrasexual competition and eating restriction in heterosexual and homosexual individuals 2010 Genetic factors predisposing to homosexuality may increase mating success in heterosexuals 2008 The Trivers–Willard hypothesis of parental investment 2001