Organizational change approaches were reviewed and analyzed in terms of the impact they have on major system variables in organizations, the type of change agent most likely to utilize each approach, and the relative affective, cognitive, and trusting behaviors required by the client system. (Author)

By the early 1960s, organization development had emerged largely from the applied behavioral sciences and had three major stems: the invention of the T-group and innovations in the application of laboratory training insights to complex organizations; the invention of survey feedback technology; and the emergence of action research. (Author/RC)