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. - 116 - FIGURE 4. 322T Index Language 1.6c (S.T. Synonyms, Quasi-synonyms, Word forms. Exhausttvity of Indexing 3 Search Rule B 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 Coordination, Int erfixing) Coord - Documents Recall Precision Fallout /nation Retrieved Ratio Ratio Ratio x y z Level Rel. Non-tel. a]a+c a/a+b b/bed 1 12o (-) 91.8% (-) (-) 2 1o7 (-) 19 0 19 3 81.7% (-) (-) 72 1.019* 55.0% 19 0 18 6.6%* 3.850%* 18 7* 19 4 38 5 312 10.9% 14 29.0% 1.179% 17 19 19 6 25 10.7% 4 35.9% 5 0. 094% 3.1% 9 19 44.4% 19 0.019% 2 19 19 7 8 3 0 2.3% 100.0% O. 00O% 1 19 10 9 10 11 12 13 14 15 FIGURE 4. 323T Index Language I.Sc (S.T. Synonyms, Quasi-synonyms, Word forms. Exhaustivity of Indexing 3 Search Rule B Document Relevance 1 - 4 Number of Documents in Collection 1,490 Number of Questions 17 (Subset 5) Number of Relevant Documents 109 Generality Number 4.6 Coordination. Int( Coord- Documents Recall Precision Fallout Inatinn R et rieved Ratio Ratio Ratio x y z Level Rel, Non-rel. a/a+c a/a÷b b/bed 1 108 (-) 99.1% (-) (-) 17 0 17 2 lO6 (_) 97.2% (-) (-) 17 0 17 3 99 (-) 88.1% (-) (-) 17 0 17 4 75 (-) 68.8% (-) (-) 17 0 17 5 60 793 55.0% 7.0% 17 17 17 6 3. 347% 38 268 34.9% 12.4% 1.131% 15 17 17 7 18 62 16.5% 22.5% 0.262% 12 17 17 8 9 59 8.3% 13.4% 0.245% 5 17 17 9 4 8 3.7% 33.3% O. 034% 2 17 17 10 1 0 0.9% 1oo.o% 0.000% 1 17 17 11 0 0 0 17 17 12 13 14 15