Many SERE veterans were appalled at the “reverse engineering” of their methods, said Charles A. Morgan III, a Yale psychiatrist who has worked closely with SERE trainers for a decade.

“How did something used as an example of what an unethical government would do become something we do?” he asked.

His question is only underscored by a 1956 article, “Communist Interrogation,” in The Archives of Neurology and Psychiatry, recently turned up by the Intelligence Science Board, which advises the spy agencies. Written by doctors working as Defense Department consultants, Lawrence E. Hinkle Jr. and Harold G. Wolff, the article shows that methods embraced after 2001 were once considered torture that would produce false information. SCOTT SHANE

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The article describes basic Soviet N.K.V.D. (later K.G.B.) methods: isolation in a small cell; constant light; sleep deprivation; cold or heat; reduced food rations. Soviets denied such treatment was torture, just as American officials have in recent years:

The effects of isolation, anxiety, fatigue, lack of sleep, uncomfortable temperatures, and chronic hunger produce disturbances of mood, attitudes and behavior in nearly all prisoners. The living organism cannot entirely withstand such assaults. The Communists do not look upon these assaults as “torture.” But all of them produce great discomfort, and lead to serious disturbances of many bodily processes; there is no reason to differentiate them from any other form of torture.

Interrogators looked for ways to increase the pressure, including “stress positions”:

Another [technique] widely used is that of requiring the prisoner to stand throughout the interrogation session or to maintain some other physical position which becomes painful. This, like other features of the KGB procedure, is a form of physical torture, in spite of the fact that the prisoners and KGB officers alike do not ordinarily perceive it as such. Any fixed position which is maintained over a long period of time ultimately produces excruciating pain.