Development Communication, has been alternatively defined as a type of marketing and public opinion research that is used specifically to develop effective communication or as the use of communication to promote social development. Defined as the former, it often includes computerized linguistics analysis of verbatim responses to qualitative survey interviews and may, at times also involved consumer psychological "right brain" (emotional) research techniques, it refers to the practice of systematically applying the processes, strategies, and principles of communication to bring about positive social change. As most providers of "communication development" research use proprietary approaches that cannot be elaborated upon without revealing proprietary trade secrets. The practice of development communication can be traced back to efforts undertaken in various parts of the world.