Why can't we? Simple. Psychologists refuse to recreate it. They refuse to prove that anything would ever be different. I really find the example of the dude 'faking' and trying to get out of the study an insanely poor choice to try to undermine its credibility. Prisoners, brace yourself for this shocker, don't want to be in prison. That makes it a more legitimate test, not less. If you could make sure every single person participating was missing out on some critical part of their life, and they would go to great lengths to try to escape, that would be an effective experiment of what prison would be like if not filled with criminals but average people under the same pressures.
