Your pwPD realizes you are using the tools and says... . " stop using that psychology BS on me?"
It's a pretty common reaction when we first start communicating differently. The best course is to validate that (factually) -
Yes, I am trying to commuincate in a different way. After a while, it just sort of becomes normal. One day, my wife just kind of quit noticing that I was doing it. Now, unless I'm really off my game and just going through the motions, she never comments about it all. There are a lot of bumps on the path to a new normal and this is one of them. Just keep plugging away - besides we really don't do it for them anyway, its truly a better way to communicate.