"A series of empirical studies of residents' conceptions of the outside spaces in housing areas showed that such spaces were conceived primarily in terms of activities and their appropriateness. These "activity schemata", served as organizing models of the world. They were strongly re lated both to design variables and to the satisfaction of social goals, but not to territorial behaviour which depended more on the individual's mode of spatial appro priation. Architects' and residents' conceptions differed due to architects' failure to appreciate the derivation of activity schemata."