The edge of chaos is a metaphor used to describe the complexity that lies between systems that are too static and systems that are too chaotic. The science of complex systems is the best paradigm to use for describing and modeling behavioral and emotional aspects from both a mathematical and a psychological point of view. Today, emotions are often better understood by means of psychophysiological correlates. By measuring affective states in human beings, it is possible to create simple rules and assign these to specific behaviors. Coding such rules makes it easier to study interactions by...