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. - 95 - 4. 124'i Index Language L6. a (S.T. Ex.haustivity of [OCRerr]ldexing 3 Search Rule A Document Relevance 1 - 4 Number of Documents in Collection 1,400 Number of Queationa 42 (Subset 2) Number of Relevant Documents 198 Generality Number 3.4 Synonyms. Quasz-synonymso Word forms. Coordination) Coord- Documents ination Recan Precision Retrieved Fallout Level Ratio Rel. Ratlo Non-rel. a/a+c Ratio a/a+b x y b/b+d z 1 z95 (-) 2 98.5% 179 (-) (_) 13, 8Z6[OCRerr] 42 0 42 3 90.4% 151 10,508 1.3%* 23. 120%* 76.3% 1.4% 42 6* 42 17.028% 42 42 42 4 120 5 3,875 60.6% 79 1,299 3.0% 6.612% 40 41 41 6 39.9% 47 362 5.7% 23.7% 2.217% 11.5% 34 39 0.618% 39 24 33 33 7 27 91 8 13,6% 7 22.9% 3.5% 0.I55% 16 27 27 9 17 5 6 29.2% O. 029% 2.5% 45.5% 7 18 18 0.01o% 5 II II 10 0 11 3 o. 0% 0 0 O. 0% 0.005% 2 7 7 12 0 0 0 3 3 0 t I 13 14 15 80 75 FIGURE 4. 125P \\, [OCRerr] \ f J PLOT OF RESULTS FOR INDEX LANGUAGES L 1. a, i 2. a 3. a, i 5. a AND i 6. a FOR 42 QUESTIONS ON 1400 DOCU I[OCRerr]E NTCOLLECTION r ] [OCRerr] Language l.la [OCRerr]. Language 1.2a t'1 Language I. 3a -[OCRerr]- La/zguage I. 5a O Language I. 6a I0 IS 20 [OCRerr]5 30 35 40 45 50 55 60 65 70 75 80 85 % PP.ECISION 90" 95 :! ;! ;i I i Ji! i i