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. - 185 - FIGURE 4.851T Index Language III. 6. a F×haustivity of indexing 3 Search Rule F Document Relevance 1-4 Number of Documents in Collection 200 (subset l) Number of Questions 42 Number of Relevant Documents 198 Generality Number 23.6 I C°°rdI ination Level 2 3 4 5 6 Starting Terms 0 1 2 0 I 2 3 0 l 2 3 4 0 1 2 3 4 5 0 l 2 3 4 5 6 Documents Retrieved Re1. Non -re1. 169 2,092 158 1,321 114 428 129 848 122 685 105 398 62 92 60 210 59 192 57 128 47 64 25 13 30 55 3O 51 30 41 30 30 23 15 I0 4 iI 10 l0 I0 i0 9 I0 6 l0 4 8 2 0 2 Recall Precision Fallout Ratio Ratio Ratio 85.4% 7.5% 25. 506% 79.8% 10.7% 16. 110% 57.6% 21.0% 5.218% 65.2% 13.2% 10.339% 61.6% 15.1% 8.354% 53.0% 20.9% 4. 854% 31.3% 40.0% I. 122% 30.3% 22.2% 2. 560% 29.8% 23.5% 2. 341% 28.8% 30.8% 1. 561% 23.7% 42.3% o. 780% 12.6% 65.8% 0.158% 15.2% 35.3% 0.G71% 15.2% 37.0% O. 622% 15.2% 42.3% 0. 500% 15.2% 50.0% 0. 366% 11.6% 60.5% O. 183% 5.1% 71.4% O. 049% 5.6% 52.4% 0.122% 5.1% 50.0% 0. 122% 5.1% 52,6% 0.110% 5.1% 62.5% 0. 073% 5.1% 71.4% 0. 049% 4.0% 80.0% O. 024% o. 0% 0.0% 0.012% I00 90 80 [OCRerr] 70 60 < so a 40 3O 20 p,,, IO o \ \ \ \ 20 30 Coordination level 2 Coordination level 3 Coordination level 4 Coordination level 5 0 Coordination level 6 40 50 [OCRerr]0 70 80 °lo PP, ECISION 9o