LEARNING'06 is one more along a series of events (LEARNING'98, LEARNING'00, LEARNING'02, hosted at Universidad Carlos III; LEARNING'04, hosted in Elche) intended to provide a forum for interdisciplinary study and discussion of the different aspects of learning. It is hoped that the interactions taking place at these events will contribute to a fluid interchange of different kinds of know-how to accelerate the progress along different research conceptions and lines.