"You want to be able to use emergency tech to try to get the information out of that person," Lieberman said. Of course, Lieberman believes such authority has limits. He does not believe the president could authorize having hot coals pressed on someone's flesh to obtain that information.
The difference, he said, is that waterboarding is mostly psychological and there is no permanent physical damage. "It is not like putting burning coals on people's bodies. The person is in no real danger. The impact is psychological," Lieberman said.
From Physicians for Human Rights,
Break Them Down: Systematic Use of Psychological Torture by US Forces. PDF
Psychological torture and cruel, inhuman, and degrading treatment can have extremely destructive health consequences for detainees. The effects can include memory impairment, reduced capacity to concentrate, somatic complaints such as headache and back pain, hyperarousal, avoidance, and irritability. Additionally, victims often experience severe depression with vegetative symptoms, nightmares, and “feelings of shame and humiliation” associated with sexual violations, among others.Read the whole thing for more information.
Although these short- and long-term consequences can be debilitating, the suffering of victims of psychological torture is often disregarded because they do not have physical evidence of the abuse they suffered. The lack of physical signs can make psychological torture seem less significant than physical torture, but the consensus among those who study torture and rehabilitate its victims is that psychological torture can be more painful and cause more severe and long-lasting damage even than the pain inflicted during physical torture.