That is actually how all mentalism works. It's traditional stage magic that is sold as psychology as part of the act to lower the audiences guard. It's super effective. Reading books like Corindas 13 steps to mentalism blew my mind when he goes over all of the shtick and stage magic gimmicks they employ so effectively.
True but I've heard other magicians critique him for overstating the psychology aspect.
If you're going to make unsourced bold claims expect to be downvoted or disregarded.
Edit: If you're going to downvote facts please explain why.