Nlp is about as real as actual mind reading.....
There is lots of forms of real psychology in mentalism, everytime you pre emt the way a subject will think or use an equivoque that is a form of psychology.
Muscle reading is a mental and psychical process; it doesn't work on everyone (like Bucky mentioned if they want you to find it they will lead you to it), what constitutes psychology any way?
'Psychology is the science of behaviour and mental processes. Its immediate goal is to understand individuals and groups by both establishing general principles and researching specific cases'.
I think any research into fooling the mind or defying natural logic is toying with the brain, therefore is a form of psychology.
I agree with Eric in the fact the psychology is in the presentation
You cannot instantly programme peoples thoughts but I know it can be done over a period of time, the mind is a very fragile thing and should be tampered with carefully