Volume 15, Number 2, 2003 Contents: K.S. Jones, What is an Affordance? T.A. Stoffregen, Affordances as Properties of the Animal-Environment System. C.F. Michaels, Affordances: Four Points of Debate. H. Heft, Affordances, Dynamic Experience and the Challenge of Reification. A. Chemero, An Outline of a Theory of Affordances.