If I remember correctly from school, there are many different criteria, but for right-handed people usually most of them provide the same answer. Example criteria: which hand is more dextrous, which foot is more dextrous, which eye perceives better, where is the speech center...
(With left-handed people it's complicated; for some of them the functionality of brain is a mirror image of right-handed people, others are some mix of both.)
Basically you are saying if we have a right handed individual with a dextrous right hand that means his left hemisphere is dominant. Thus for them hypnosis is about activiting the left brain hemisphere?
Is that a correct description of your claim?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.