Fun site with links to articles on many learning theories including Piaget, Constructivism, Behavioralism, Brain Based Learning, Social Cognition, Emotional Inteligence, Social Learning Theory, and more.
S. Gelly, O. Teytaud, N. Bredeche, and M. Schoenauer. GECCO 2005: Proceedings of the 2005 conference on
Genetic and evolutionary computation, 2, page 1783--1784. Washington DC, USA, ACM Press, (25-29 June 2005)