Events as changes in the layout of affordances

In a target article that appeared in Ecological Psychology, Stoffregen (2000a) questioned the possibility of ecological event perception research. This article describes experiments performed to examine the perception of the disappearance of gap-crossing affordances, a variety of event as defined by Chemero (2000). We found that participants reliably perceive both gap-crossing affordances and the disappearance of gap-crossing affordances. Our findings provide empirical evidence in favor of understanding events as changes in the layout of affordances, shoring up event perception research in ecological psychology.