CRANV2 Supplementary tests and 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. - 236 - FIGURE 6.17T Exhaustivity of Indexing Search Rule B Document Relevance 1-4 Number of Documents 1400 Number of Questions 19 {Subset 4) Number of Relevant Documents 131 Generality Number 4.9 Coordination Level 4 Figure Index Language Documents Recall Precision Fallout x y z Retrieved Ratio Ratio Ratio Rel. Non-rel. 4.300T I.l.a 37 127 28.2% 22.6% 0.480% 15 19 19 4.310T I. 1. b (Partitioning) 26 75 19.6% 25, 7% 0.283% 12 19 19 4.320T I.I.c (Interfixing) 25 54 19.1% 31.6% 0.204%i 12 19 19 4.330T I, 1,d (Interfixing & 16 36 12.2% 30.8% 0.136%1 10 19 19 Partitioning) FIGURE 6.18T Exhaustivity of Indexing Search Rule B Document Relevance 1-4 Number of Documents 1400 Number of Questions 19 (Subset 4) Number of Relevant Documents 131 Generality Number 4.9 Coordination Level 4 Figure Index Language Documents Recall Precision Fallout x y z Retrieved Ratio Ratio Ratio Rel. Non-rel. 4.302T 1.6.a 56 765 44.3% 7.0% 2.890% 19 19 19 4.312T I. 6.b (Partitioning) 39 321 29.8% 10.8% 1.213% 16 19 19 4.322T I. 6. c (Interfixing) 38 312 29.0% lO.9% 1.179% 17 19 19 4.332T 1.6.d (Interfixing & 27 148 20.6% 15.4% 0.559% 12 19 19 Partitioning)