How to get perpetrators to admit to rape

How do you get rapists to admit to rape? Basically, don't use the word rape.  Some interesting studies have been published with this data. Similarly, if you want to find out how many people have been sexually assaulted, you don't use the word either rape either.  Often, labels scare people from admitting to their conscious self what really happened. Check out this link for info on these study results.  http://www.upworthy.com/whoa-4-questions-that-got-120-rapists-to-admit-they-were-rapists-5?g=2&c=ufb1