When I was very young my uncle used to determine which foot people were dominant with by having them stand feet together with their eys shut and from behind with out them knowing push them. Which ever foot they moved to catch themselves with was the one he had them put in the front binding. I have continued that and it seems to work pretty good I have two daughters who are regular and one who is goofy like me. The majority of people who I ahve done this with are regular.