Hi everyone, I wish to conduct a little psychological research that relates to my book, which is a non-fiction work. With this research I'll be amateurly using a version of the MBTI test. It ain't gonna be the main part of the book - just one chapter out of many, intended to prove certain points I have written of previously. Now, I realize that MBTI is a registered trademark. I also realize that I couldn't really tell the readers which test I was using, since I'm gonna be using a test someone else has created, which is also licensed. This might lead to some loss of "scientific credibility" on my behalf (since I "don't expose my methods"), yet I'm willing to take this burden in order to gain the benefit of using the test as a tool in my research. What I was wondering about is this - could I even mention that I am using the MBTI research method in the book? Do you need to pay someone money in order to even use the name, or can you mention that you have used that method and the results of that use, as long as you don't mention using a specific test created by someone else?... Thanks for your help folks. Much appreciation in advance.