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. - 89 - FIGURE 4. 104T Index Language I. 6. a (S. T. Synonym[OCRerr]. Quasi-synonyms, Word ft,rn[OCRerr]s.Coordination) Exhauatlvlty of Indexing 3 Search RLde A Document HeJevance I - 4 Number of Document8 in Collection 1,400 Number of Questions 221 (Sub[OCRerr]et 3) Number of Relevant Documente I, 590 aeneraIRy Number 5.1 Coord- Dochmente ination Recall Precision Ratio Fallout Level Retrieved Rel. Non-rel. l[OCRerr]atio a/a+c Ratio a/a+b b/b+d x y z 1 1,557 (-) 2 1,430 97.9% (_) (.) l!G. 374[OCRerr] 221 0 221 3 1,165 45, I0i* 89.9% 1.2[OCRerr]* 73.3% 37.783%* 2. 5%* 14. 643%* 221 44* 221 218 4 648 109" 220 lb. 373[OCRerr] 5 503 8. 895[OCRerr] 53.3% 4.4%* 206 142" 212 295 3,674= 31.6% 5.005%* 6 5.4%* 18.6% 7. 17.* 2.8887.* I. 257%* 160 177" 107 119 7 101 161" 164 1,136 6 72 10.1% 344 12.4% 83 140 140 24 4,5% 82 17.3% 0.369% 9 1.5% 0.112% 22.6% 54 0.027% 105 105 I0 25 78 78 11 6 18 0 0.4% l 25.0% 12 52 52 0 0.0% 0 O. 0% 0.006% 12 O. 0003% I 32 32 13 0 15 0 15 14 0 0 0 8 8 15 O 0 0 0 4 4 0 3 3 FIGURE 4. 105P PLOT OF RESULTS FOR INDEX LANGUAGES I. I. a L 2. a L 3. a L 5. a AND L 6. a FOR 221 QUESTIONS ON 1400 DOCUNLE NT COLLECTION 30 35 40 45 50 55 % PIAECISION A Language l. la Z-N. Langauge 1.2a /:J Language 1.36 [OCRerr]- Language 1.8a O Language 1.66 60 65 70 75 80 85 oo 95