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. 173 - FIGURE 4. 815T Index Language III. 6. a (Controlled terms. Exhaustivity of Indexing 3 Search Rule E Document Relevance 1 - 4 Number of Documents in Collection Number of Questions 42 (Subset 2) Number of Relevant Documents 198 Generality Number 23.6 Narrower, broader and related terms. 200 (Subset 1) Coord- ination Level I 2 3 4 5 6 7 8 9 Documems Retrieved Rel. Non-rel. 196 4,685 159 2,092 129 848 60 210 30 55 11 10 2 2 2 2 2 1 Beca~ Precision FaHout Ratio Halo Ratio a/a+c a/a+b b/b+d 99.0% 4.0% 57.134% 85.4% 7.5% 25. 506% 65.2% 13.2% 10.339% 30.3% 22.2% 2. 560% 15.2% 35.3% 0.671% 5.6% 52.4% 0.122% 1,0% 50.0% 0.024% 1.0% 50.0% o. 024% 1.0% 66.7% o. 012% x y z 42 42 42 42 42 42 42 41 41 31 34 34 18 24 24 5 13 13 2 8 8 2 4 4 2 3 3 IO0 9o 1 80 J[OCRerr]-. \ ,o l\ 6O .-1 2O 0 I0 JO / \ I"\\ 50 60 °/o PRECISION 20 30 40 80 90 I00 FIGURE 4.815P INDEX LANGUAGE III. 6. a SEARCH E 200 DOCUMENTS (index Language IIL 1. a Broken line) Coordination)