For many years, psychologists have studied
the principles of psychophysics. Recently, cartographers
have been considering psychophysical theory in
color attribute analysis to aid in the design of maps.
An experiment was conducted using the partitioning
method by which the Munsell value scale was determined
to find (R,G,B) coordinates giving equally distinct
chromas that would be applicable to the production of
maps on color CRT terminals using computer mapping programs.
Since constant conditions of lighting and
viewing background were used for all participants,
"simultaneous contrast" effects were held constant. The
data curves for red, green and blue were all found to
be power functions
