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. - 121 - Section 4 Indexing Exhaustivity Results when the three different levels of indexing exhaustivity are compared are given in Figs. 4.400T - 4.405T and 4.410T - 4.415T. Three sets of questions are presented separately, being the 221 questions (subset 3} searched on the 1400 collection, the 35 seven starting term questions (subset 1} searched on the 1400 collection, and the 42 questions (subset 2} searched on the 200 collection. Results for index languages I.l.a and 1.6.a are given. and the three different performance curves for each question subset and language are given in Figs. 4,420P - 4.425P. No adjustment has been made in these graphs for the d£ffer/ng generality number amongst the different plots, since only the relative position of the curves on each plot is important. LIST OF FIGURES Index No. of Question Document Exhaustivity Language Questions Subset Collection 4.400T 2 I. 1.a 221 3 1400 4.401T l I. 1.a 221 3 1400 4.402T 2 I. 1.a 35 1 1400 4.403T 1 I. 1.a 35 1 1400 4.404T 2 I. 1. a 42 2 200 4. 405T 1 I. 1. a 42 2 200 4.410T 2 1.6°a 221 3 1400 4.411T 1 1.6.a 221 3 1400 4.412T 2 1.6.a 35 1 1400 4.413T 1 1.6.a 35 1 1400 4°414T 2 1.6.a 42 2 200 4.415T 1 1.6.a 42 2 200 4.420P 3, 2, 1 I.l.a 221 3 1400 4.421P 4.422P 4.423P 4.424P 4.425P 3, 2, 1 I.l,a 35 1 3, 2, 1 I.l.a 42 2 3, 2, 1 1,6.a 221 3 3, 2, 1 1.6.a 35 1 3, 2, 1 1.6.a 42 1400 2OO 1400 1400 200 Plot s Plot 4.100T 4. 400T 4.401T Plot 4.110T 4.402T 4.403T Plot 4. 140T 4. 404T 4.405T Plot 4.104 T 4.410T 4.411T Plot 4.114 T 4.412T 4.414T Plot 4. 203T 4.414T 4.415T