Biderman, a social scientist with the
US Air Force, was assigned to research why many
American prisoners of war (POW) captured by Communist forces during the
Korean War were cooperating. After extensive interviews with returned POWs, Biderman concluded that there were three major elements behind the Communist interrogators' coercive control: "dependency, debility and dread". Biderman summarized his findings in a chart first published in the paper
Communist Attempts to Elicit False Confessions From Air Force Prisoners of War in a 1957 issue of
The Bulletin of the New York Academy of Medicine. The paper was an analysis of the psychological, rather than physical, methods used to coerce information and false confessions. Psychiatrist
Robert Jay Lifton conducted similar research into the same Chinese methods; coining the term "thought reform" (now known as
brainwashing) to describe them in the same issue of
The Bulletin. ==Coercion methods==