Interaction process analysis, 1950, i.e. 1948.

SYMLOG, 1967: t.p. (Robert F. Bales)

Harvard Gazetter, viewed June 19, 2012 article dated April 20, 2006 (Robert Freed Bales, Professor of Social Relations, Emeritus, was born in Ellington, Missouri; earned a degree from University of Oregon and a Ph.D in Sociology from Harvard where he taught from ca. 1945 until he retired with the rank of Emeritus Professor in 1986. His scientific and scholarly work was widely recognized. He received the Distinguished Career Award of the American Association of Specialists in Group Work in 1982, the Cooley-Mead Award of the American Sociological Association in 1983, and the Distinguished Teaching Award of the American Psychological Foundation in 1984. Bales died in San Diego)

Infed.org, June 19, 2012 (Robert Freed Bales (1916-2004) was the Professor of Social Relations and Director of the Laboratory of Social Relations at the University of Harvard) http://www.infed.org/thinkers/robert_freed_bales.htm