The psychologists relied heavily on experiments done by American psychologist Martin Seligman in the 1970s on learned helplessness. In these experiments caged dogs were exposed to severe electric shocks in a random way in order to completely break their will to resist. Mitchell and Jessen applied this idea to the interrogation of Abu Zubaydah. Many of the interrogation techniques used in the SERE program, including waterboarding, cold cell, long-time standing, and sleep deprivation were previously considered illegal under U.S. and international law and treaties at the time of Abu Zubaydah's capture. In fact, the United States had prosecuted Japanese military officials after World War II and American soldiers after the Vietnam War for waterboarding and as recently as 1983. Since 1930, the United States had defined sleep deprivation as an illegal form of torture. Many other techniques developed by the CIA constitute inhuman and degrading treatment and torture under the United Nations Convention against Torture and Article 3 of the European Convention on Human Rights.