CRANV2 Test Environment 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. ° 23 - No, of No of No. of Documents in I[OCRerr]elevant Question Subsets Questions Collection Documents Tested Geuera~,ity Number Subset 1 35 1400 All have seven siarting terms in single term languages, covering aerodynamics and structures. Subset 2 42 1400 Startiag terms vary, all 42 200 questions aerodynamics only. (subset 1) 38 are drawn from Subset 42 350 3, and 4 from the 58 (subset 2) questions not used. The number of relevant in the 1400 collection is actually 201, but the three documents concerned (1329 in QI19, 2289 in Q145 and Q146) are deleted from the collection in results of this subset since they did not appear in collection Subset 1. Subset 3 221 1400 Starting terms vary, covering aerodynamics and structures. The largest set of questions available, all single theme in single term languages. Subset 4 19 1400 Part of Subset 1, all having seven starting terms. Subset 5 17 1400 All having eleven starting terms in single term languages, covering aerodynamics and structures. Sut)set 6 20 .1400 Part of Subset 1, [OCRerr]11 having seven starting terms. Subset 7 77 350 (subset 2) Includes all the questions in Subset 2, aerodynamics only. Subset 8 42 1400 Structures only. 287 1590 131 109 147 454 255 5.9 3.4 23.6 13.5 5.1 4.9 4.6 5.3 16.8 4.3 FIGURE 2.12