CRANV2 Main test 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. - 114 - FIGURE 4.312T Index Language 1.6b (S.T. Synonyms, Quasi-synonyms, Word forms. Coordination. Exhauailvity of Indexing 3 Partitioning) Search Rule R Document Relevance 1 - 4 Number of Documents in Collection 1,400 Number of Questions 19 (Subset 4) Number of Relevant Documents 131 Generality Number 4.9 Coord- Documents Recall Precision FaLlout L, mtion Retrieved Ratio Ratio Ratio Level Rel. Non-rel. a/a+c a]a+b x y z b/b+d 1 120 (-) 91.6% (-} (_) 2 109 19 0 19 3 4-) 83.2% (-) (-) 79 1,154" 60.3% 19 5.4%* 0 10 4.375%* 19 7* 19 4 39 321 5 29.8% 17 10.6% 16 30 1.213% 19 19 6 13.0% 36.2% 8 5 0.113% 11 6.1% 19 19 61.5% 0.019% 4 19 19 7 5 0 8 3.8% I 00.0% 0. 000% 3 19 19 9 10 11 12 13 14 15 FIGURE 4. 313T Index Language 1.6b (S.T. Synonyms, Quasi-synonyms, Word forms. Coordination, PartittJ Exhaustlvity of Indexing 3 Search Rule B Document Relevance I - 4 Number of Documents in Collection 1.400 Number of Questions 17 (Subset 5) Number of Relevant Documents 109 GeneraLity Number 4.6 Coord- Documents Recall Precision Fallout ination Retrieved Ratio Ratio Ratio z Level Rel. Non-rel. a]a+c a/a+b x y b/b+d I io6 (-) 2 99.1% (-) (-) 104 (-) 17 0 17 3 95.4% (-) (-) 90 (-) 17 82.5% 0 (-) 17 (-) 17 0 17 4 72 (-) 5 66.1% (-) (-) 17 54 0 702 17 6 49.5% 32 226 7.1% 2. 963% 16 17 29.4% 17 12.4% 0.954% 14 17 17 7 17 37 8 15.5% 31.5% 7 10 17 19 0.156% 17 9 6.4% 2 26.9% O. 060% 4 17 17 0 1.6% I oo. 0% o. 000% 1 17 17 10 1 0 11 o. 0% i oo. 0% o. 000% 1 0 17 0 17 12 0 17 17 13 14 15