Within animal populations there is variation among individuals in their tendency to be social,
where more sociable individuals associate more with other individuals. Consistent inter …

Oxytocin-and vasopressin-related systems are present in invertebrate and vertebrate
bilaterian animals, including humans, and exhibit conserved neuroanatomical and …

A central premise of the science of comparative affect is that we can best learn about the
causes and consequences of affect by comparing affective phenomena across a variety of …

We studied personality, subjective well-being, and hair cortisol level, in common marmosets
Callithrix jacchus, a small, cooperatively breeding New World monkey, by examining their …

Despite being closely related, bonobos and chimpanzees show remarkable behavioral
differences, the proximate origins of which remain unknown. This study examined the link …

The hypothalamic-pituitary-gonadal (HPG) axis is a key biological system required for
reproduction and associated sexual behaviors to occur. In the avian reproductive model of …

The concept of “social homeostasis”, introduced by Matthews and Tye in 2019, has provided
a framework with which to consider our changing individual needs for social interaction, and …

Modern human lifestyle strongly depends on complex social traits like empathy, tolerance
and cooperation. These diverse facets of social cognition have been associated with …

Humans have unique cognitive capacities that, compared with apes, are not only simply
expressed as a higher level of general intelligence, but also as a quantitative difference in …

Most variation in behavior has a genetic basis, but the processes determining the level of
diversity at behavioral loci are largely unknown for natural populations. Expression of …