CRANV2 Supplementary tests and results chapter Cyril Cleverdon Michael Keen Cranfield An investigation supported by a grant to Aslib by the National Science Foundation. Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. 224 - Ioo 95 90 85 80 75 70 65 60 _i 55 ._1 (3 so LI.J n" [OCRerr] 4s 4o 35 30 25 20 IS IO S X Relevance Grade 1 O Relevance Grade 1-2 ÷ zx Relevance Grade 1-3 Relevance Grade 1-4 a, X X"-- 8....,._. [OCRerr],_._[OCRerr] C .-----._, ___[OCRerr] s [OCRerr]o [OCRerr]s 2o 2s 3o 3s 4o 4s so ss 6o 6s 7o 7s aO es 9o 9s too °/o PI[OCRerr]ECI SION FIGURE 6.3P PLOTS OF EFFECT OF DOCUMENT RELEVANCE AT EIGHT COORDINATION LEVELS