Aggression usually involves a sequence of behaviors, reflecting escalations and de-escalations in the form or intensity of the actions taken, which play out ove

Are bird songs learned or genetically programmed? Howdo animals attract the opposite sex? How does playaffect development? How do wolves signal surrender?Which

This volume is an overview of research examining the relationship between hormones and aggressive behavior. The last 15 years have witnessed a tremen dous growt

This well-written and lively account of the principles of how motivational systems operate includes discussions of both theories and empirical results from indi