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Abstract
We have compared two different methods of plotting the Farnsworth Munsell FM-100 test, namely the Farnsworth and the Kinnear techniques. Data from 30 individuals having a red-green deficiency were plotted using both techniques. The cap score distributions were analysed using both the Knobaluch Sine wave (Fourier) and the the Red-Green and Blue-Yellow partial scoring methods. We found that the Farnsworth and Kinnear plots give different results for the measures obtained by the Knoblauch method of analysis. On the other hand, the ‘difference score’ obtained from the King-Smith et al. method were not significantly different for the two plotting methods.