For the full wiki, see article here: http://en.wikipedia.org/wiki/Mind_control
Here's just one researcher's findings:
Lifton thought reform model
Main article: Thought Reform (book)
In his 1961 book Thought Reform and the Psychology of Totalism: A Study of "Brainwashing" in China, psychiatrist Robert Jay Lifton, M.D., describes eight coercive methods which, he says, are able to change the minds of individuals without their knowledge and were used with this purpose on prisoners of war in Korea and China. These include:
This involves the control of information and communication both within the environment and, ultimately, within the individual, resulting in a significant degree of isolation from society at large.
There is manipulation of experiences that appear spontaneous but in fact were planned and orchestrated by the group or its leaders in order to demonstrate divine authority or spiritual advancement or some special gift or talent that will then allow the leader to reinterpret events, scripture, and experiences as he or she wishes.
Demand for Purity.
The world is viewed as black and white and the members are constantly exhorted to conform to the ideology of the group and strive for perfection. The induction of guilt and/or shame is a powerful control device used here.
Sins, as defined by the group, are to be confessed either to a personal monitor or publicly to the group. There is no confidentiality; members' "sins," "attitudes," and "faults" are discussed and exploited by the leaders.
The group's doctrine or ideology is considered to be the ultimate Truth, beyond all questioning or dispute. Truth is not to be found outside the group. The leader, as the spokesperson for God or for all humanity, is likewise above criticism.
Loading the Language.
The group interprets or uses words and phrases in new ways so that often the outside world does not understand. This jargon consists of thought-terminating clichés, which serve to alter members' thought processes to conform to the group's way of thinking.
Doctrine over person.
Member's personal experiences are subordinated to the sacred science and any contrary experiences must be denied or reinterpreted to fit the ideology of the group.
Dispensing of existence.
The group has the prerogative to decide who has the right to exist and who does not. This is usually not literal but means that those in the outside world are not saved, unenlightened, unconscious and they must be converted to the group's ideology. If they do not join the group or are critical of the group, then they must be rejected by the members. Thus, the outside world loses all credibility. In conjunction, should any member leave the group, he or she must be rejected also.
In his 1999 book Destroying the world to save it: Aum Shinrikyo, Apocalyptic Violence and the New Global Terrorism, he concluded that thought reform was possible without violence or physical coercion.