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B J Craven; A second box-end scoring artifact in the Farnsworth-Munsell 100-hue test.. Invest. Ophthalmol. Vis. Sci. 1993;34(3):503-506.
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© ARVO (1962-2015); The Authors (2016-present)
PURPOSE: To investigate and describe a hitherto unreported scoring artifact in the Farnsworth-Munsell 100-hue Test, arising from the grouping of the caps into four boxes, which causes caps near the ends of a box to score less than caps near the center of a box. This artifact is in addition to a previously reported one, which causes caps near the end of a box to score more than caps in the center of the box. METHODS: Two different statistical simulations were used to generate synthetic cap sequences, which were scored in the normal way. RESULTS: For error scores less than about 500, the new artifact, which depresses scores at the ends of boxes, was found to dominate the pattern of scores. CONCLUSION: The existing published correction for the box-end scoring artifact is inappropriate for scores less than about 500, and therefore should be applied cautiously.
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