Although derived on arbitrary grounds, it performed well in practice. It has been suggested by Amis (1978) that the increased carrying angle at the femaleelbow, which allows a greater degree of extension, might weight this scoring system in favour of females. However, the results do not bear this out. Although minor differences are seen between the right and left sides of individuals, the coarser movements measured with this system always scored equally on both sides, When both sides did not behave similarly, this was usually attributable to an earlier injury.