The behavior of the human organism in spatial situations is examined. Extensive research by the author in this subject area is supplemented by other studies. Among the research areas explored are small group ecology, territoriality, and the related concept of privacy. In these areas social interaction behavior is of particular concern. Social behavior is then related to several specific areas or design settings which include--(1) a mental hospital, (2) the learning environment, (3) the tavern, and (4) college dormitories. The process of conducting this type of research, and the role that the behavioral scientist can play in the translation of subsequent information for use by the designer, is consistently dealt with throughout the document. Environmental programing is developed as the common area of interest that would draw the researcher and designer into meaningful interaction. (RS)