Buildings have to respond to changes in order to remain functional. Traditional means to adapt to change are to design relatively static shells that can accommodate to some degree changes. Recently a number of technologies have come into existence that extend the capacity of buildings to change in a more autonomous way. Such buildings are responsive buildings. In this paper we deal with a special case of such responsive buildings: interactive buildings. Interactive buildings engage in a dialogue with the user and have an internal representation of the user. Interactive buildings can display a variety of 'styles' how they interact with people - these are known as attitudes. As a building may go through a number of attitudes during the interaction with the user, control structures are necessary to determine this change. The mechanisms for these changes are the 'psychology' of the building.