1. Marquis, D.G. and Allen, T.J., Communication patterns in applied technology, American Psychologist, 21, 1052, 1966.
2. Garvey, W.D. and Tomita, K., Continuity of productivity by scientists in the years 1968–1971, Science Studies, 2, 379, 1972. We were especially interested in learning if they were currently working in the same subject matter area as their previous articles. The results of the first study of this particular series suggest that apparently every two years about half of the authors of journal articles move into “new” subject-matter areas, frequently returning to previous areas.
3. For detailed descriptions of these surveys, questionnaires used and general findings see: Garvey, W.D., Lin, N., Nelson, C.E. and Tomita, K., Description of a machine-readable data bank on communication behavior of scientists and technologists, Selected Documents in Psychology, 2, 3, 1972. This document can be obtained from the American Psychological Association, 1202 16th Street N.W., Washington, D.C., 20036, U.S.A.