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. - 134 - FIGURE 4.502T Index Language 1.6.a (S.T. Synonyms, Quasi-synonyms, Word Forms. Exhaustivity of Indexing 3 Search Rule A Document Relevance 1 - 4 Number of Documents in Collection i, 400 Number of Questions 19 (Subset 4) Number of Relevant Documents 13i Generality Number 4.9 Coordination) Coord- Documents Reca]3 Precision Fallout ination Retrieved Ratio Ratio Ratio x y z Level Eel. Non-rel. a/a+c a/a+b b]bed 1 128 (-) 96.2% (-) (-) 19 0 19 2 114 9°568 87.0% 1.2% 35.969% 19 19 10 3 98 3,962 74,8% 2.5% 14.895% 19 19 19 4 61 1,142 46.6% 5.1% 4.314% 19 19 19 5 33 192 25.2% 14.7% 0.725% 16 19 19 8 18 30 13.7% 37.5% 0.113% 8 19 19 7 8 1 8. t% 88.9% 0.004% 3 19 19 FIGURE 4. 503T Index Language 1.6.a (S.T. Synonyms, Quasi-synonyms, Word forms, Exhaustlvity of Indexing 3 Search Rule A Document Relevance 1 - 4 Number of Documents in CoLlection 1,400 Number of Questions 17 (Subset 5) Number of Relevant Documents 109 Generality Number 4.6 Coordination) Coord- Documents Recall Precision Fallout ination Retrieved Ratio Ratio Ratio x y z Level Rel. Non-rel. a/a+c a/a+b b/b+d 1 lO9 (-) lO0.0% (-) (-) 17 0 17 2 108 13,865 99,1% 0.8% 58,256% 17 17 17 3 101 7,264 92.7% 1.4% 30,52!% 17 17 17 4 91 4,124 83.5% 17 17 5 2.2% 17,328% 17 73 2,353 67.0% 3.0% 9.932% 17 17 17 6 54 1,026 49.5% 5.0% 4.331% 17 17 17 7 37 361 34.0% 1.524% 17 17 17 8 9.3% 23 136 21.1% 16 17 17 9 14.5% 0.574% 9 41 8.3% 18.0% 0.173% 10 17 17 10 2 12 11 1.8% 14.3% 0.051% 4 17 17 0 0 0 17 17