Abstract: Modeling believable autonomous agents needs to take into account many different aspects from very different disciplines, ranging from cognitive psychology to mechanics. In this paper, we focus on research work dedicated to the modeling of human decision in a reactive way, a domain in-between the biomechanical motion control of the activity and the rational and social background which motivates and shapes the execution of such activities. We cover models of reactive human behaviors introduced in computer science and cognitive science, assessing and comparing them from the application-oriented perspective of modeling credible real-time virtual anthropomorphic actors.