This focus on agent-situation interactions in ecological psychology was consistent with the situated cognition program of researchers such as James G. Greeno (1994, 1998), who appreciated Gibson's apparent rejection of the factoring assumptions underlying experimental psychology. The situated cognition perspective focused on "perception-action instead of memory and retrieval…A perceiving/acting agent is coupled with a developing/adapting environment and what matters is how the two interact". Greeno (1994) also suggested that affordances are "preconditions for activity," and that while they do not determine behavior, they increase the likelihood that a certain action or behavior will occur.