F-M 100-Hue total error scores have discrete values.
A proof is presented which shows that the total error scores derived from the Farnsworth-Munsell 100-Hue test are an integer multiple of 4. The one proviso for this relates to the way in which the first and last caps in a box are handled.
Dain
S J
SJ
School of Optometry, University of New South Wales, Kensington, Australia.
Saunders
J E
JE
D003119:Color Perception Tests; D006801:Humans