The relationship of architecture to human behavior is a topic of increasing concern both to designers and behavioral scientists. To further evaluate the extent of the relationship a series of preliminary investigations has been undertaken. The primary means of measurement was informal conversations of dental students as related to the circumstances under which the interaction took place. Categories established to describe the activities during which the conversations took place were--(1) carrying out a specific stationary activity, (2) waiting, (3) in transit, and (4) no specific activity. Specific spatial areas were related to these activities and some initial conclusions drawn, such as the observation that people in the middle of a laboratory bench tend to have more interactions. This research is stated to be exploratory in nature and to require further refinement. (RS)