this is the "rigor" of the "larger study" of 28 was studied this way... :- "Twenty-eight patients (residents of a Jewish home for the aged) who were able to r

this is the "rigor" of the "larger study" of 28 was studied this way... :- "Twenty-eight patients (residents of a Jewish home for the aged) who were able to recall whether or not they cracked knuckles (and in the case of a positive response were able to demonstrate a KC maneuver) were examined clinically and by x-ray. "