Actually Toole and Olive essentially did exactly the same test using speakers. And they published the entire experiment in the peer reviewed AESJ. This is a very common method used in many clinical studies. So is that a sad commentary on how science does research on human perception?
Did you hit your head recently? The procedure I mentioned was done in an appropriate way whereas the one I addressed was not. That, and Barton was part of the team you mentioned, which may explain your misunderstanding.
All the best,
Nonoise