Unfortunately, the only time that's true is when you're in a rapidly developing situation, and you can't tell when it does and when it doesn't until it's too late. And it doesn't work as well as other interrogation techniques if you have the time. The CIA had established that by 1962, and had a
manual on it. Allow me to quote from it:
"The threat of coercion usually weakens or destroys resistance more effectively than coercion itself. The threat to inflict pain, for example, can trigger fears more damaging than the immediate sensation of pain. In fact, most people underestimate their capacity to withstand pain. The same principle holds for other fears: sustained long enough, a strong fear of anything vague or unknown induces regression, whereas the materialization of the fear, the infliction of some form of punishment, is likely to come as a relief. The subject finds that he can hold out, and his resistances are strengthened. 'In general, direct physical brutality creates only resentment, hostility, and further defiance.' (reference provided in original text)"
The tone here is clear: threats are much more effective than punishments. The threat allows the subject's mind to work against itself; the actuality creates the feeling that resistance is possible, once it has been endured. This impression is strengthened by the following:
" Interrogatees who are withholding but who feel qualms of guilt and a secret desire to yield are likely to become intractable if made to endure pain. The reason is that they can then interpret the pain as punishment and hence as expiation. There are also persons who enjoy pain and its anticipation and who will keep back information that they might otherwise divulge if they are given reason to expect that withholding will result in the punishment that they want. Persons of considerable moral or intellectual stature often find in pain inflicted by others a confirmation of the belief that they are in the hands of inferiors, and their resolve not to submit is strengthened.
Intense pain is quite likely to produce false confessions, concocted as a means of escaping from distress. A time-consuming delay results, while investigation is conducted and the admissions are proven untrue. During this respite the interrogatee can pull himself together. He may even use the time to think up new, more complex "admissions" that take still longer to disprove. KUBARK is especially vulnerable to such tactics because the interrogation is conducted for the sake of information and not for police purposes.
If an interrogatee is caused to suffer pain rather late in the interrogation process and after other tactics have failed, he is almost certain to conclude that the interrogator is becoming desperate. He may then decide that if he can just hold out against this final assault, he will win the struggle and his freedom. And he is likely to be right. Interrogatees who have withstood pain are more difficult to handle by other methods. The effect has been not to repress the subject but to restore his confidence and maturity."
The ineffectiveness of pain is emphasized. It is more likely to create exactly the opposite effect of that desired.
Let me repeat: this was KNOWN in 1963. This is a study published by one of the most effective intelligence agencies in the world. Anyone who thinks the people writing this didn't know what they were talking about is a fool; this manual lays out the techniques of coercive interrogation, coldly, clinically, and without pulling any punches.
And the people currently conducting interrogations for the United States are ignoring this. And if you think I just said they're fools, you are correct.