AVPR1A and Anxiety: In order to translate these interesting findings to humans, molecular genetic association studies have already investigated genetic variants on the AVPR1A and AVPR1B4 genes in relation to individual differences in a vast range of human behaviors, including anxiety related personality traits (Meyer-Lindenberg et al., 2009; Kazantseva et al., 2014), altruistic behavior (Avinun et al., 2011), musical aptitude (Ukkola et al., 2009), pair bonding (Walum et al., 2008), and autism (Yirmiya et al., 2006; Yamasue, 2013).