Human Experimentation Courtesy of Bushco
...one of the main reasons Zubaydah's early torture sessions were videotaped was to gain insight into his "physical reaction" to the techniques used against him, which was then shared with officials at the CIA and the Justice Department, who used that information to help draft the August 2002 torture memo stating what interrogation methods could be legally used, how often the methods could be employed and how it should be administered without crossing the line into torture.
For example, one current and three former CIA officials said some videotapes showed Zubaydah being sleep deprived for more than two weeks. Contractors hired by the CIA studied how he responded psychologically and physically to being kept awake for that amount of time. By looking at videotapes, they concluded that after the 11th consecutive day of being kept awake Zubaydah started to "severely break down." So, the torture memo concluded that 11 days of sleep deprivation was legal and did not meet the definition of torture.
"I would describe it this way," said one former National Security official. "[Zubaydah] was an experiment. A guinea pig. I'm sure you've heard that a lot. There were many enhanced interrogation [methods] tested on him that have never been discussed before we settled on the 10 [techniques]."