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. - 142 - FIGURE 4. 003T Index Language I.'6. a {S. T. Synonyms, Quasi-synonyms, Word forms. Coordination) Exhauntlvity of Indexing 3 Search Rule A Document Relevance I - 2 Number of Documents In Collection 1.400 Number of Questions 25 (8 questions had no relevant docqments) Number of Relevant Documents 79 Generality Number 1. fi Coord- Doculllentn Recall Precision FaLlout Ination Retrieved Ratio Ratio Ratio x y z Level Rel. Non-rel. a/a+c a/a÷b b/bed I 76 {-1 98.7% (-) (-) 0 2 70 35 19,449" 88.6% 35 0.4%* 39.691%* 35 23* 3 53 0.219 67.1% 0.6% 35 16.601% 35 35 35 4 37 2,51{} 46.6% 1,4% 5.149% 35 35 5 24 619 30.4% 35 3.7% 1.265% 30 6 17 130 21.6% 35 35 11.6% 0.266% 18 35 35 7 0 26 v.0% 16.6% 0.053% 6 35 35 FIGURE 4. 604T Index Language I. 1.a (S.T. Natural language. Coordination) Exhaustlvity of Indexing 3 Search Rule A Document Relevance I Number of Documents In Co].lectlon 1,400 Number of Questions 35 (24 questions had no relevant documents) Number of Relevant Documents 18 Generality NumberO. 4 Rel. 17 23,932 16 8.291 12 3,014 8 666 5 186 2 56 2 14 Documents Recall Precision Fallout Retrieved Ratio Ratio Ratio x y ¢ Non-tel. a/a+c a/a4b b/bed 94,4% 0.1% 48,840% 88.9% 0.2% 16.920% 68.7% 0.4% 6.145% 44.4% 1.2% 1.401% 27.8% 2.6% 0,304% 11.1% 3.3% 0.116% 11.1% 12.5% 0.020% 35 35 35 35 35 35 34 35 35 26 35 35 16 35 35 7 35 35 3 35 35 FIGURE 4. 605T Index Language l.fi.a (S.T. Synonyms. Quasi-synonyms. Word forms. Exhauntivity of Indexing 3 Search Rule A Document Relevance 1 Number of Documents in Collection 1.400 Number of Questions 35 (24 questlona had no relevant documents) Number of Relevant Documents 18 Generality Number 0.4 Documents Retrieved Rel__ Non-tel. 16 (-) 16 19.503' 13 8,259 lO 2,546 8 636 6 141 7--J-] 3 29 Coordination) 1oo. 0% (-) (-) 88.9% 0.1%* 39.602% 72.2% 0.2% 16.881% 55.6% 0.3% 5.195% 50.0% 1.4% 1.208% 33.3% 4.1% 0.288% 16.7% 0.4% 0.050% 35 0 35 35 23* 35 35 35 35 35 35 35 30 35 35 18 35 35 6 35 35 Recall Precision Fallout Ratio Ratio Ratio x y s a/a+c a/a+b b/bed