In a double-blind procedure, one group of men is given a beverage containing alcohol and a second group is given a similar-tasting beverage that contains no alcohol. in each group, half the men are told they are drinking an alcoholic beverage and half are told their beverage is nonalcoholic. both groups of men then view erotic movies. research indicates that after watching the erotic material:

I believe the answer is: the men who thought they were drinking alcohol will feel LESS guilty than those who did NOT think they were drinking alcohol, regardless of the true content of the beverage.

This situation happen because The men who think that they drink alcohol could blame their 'shameful action' on the influence of alcohol.
This experiment result is done in order to determine whether 'placebo effect' could actually influence someone's condition or not.

It gets more wisdom and they know more knowledge