IRS13 Test Environment chapter E. M. Keen Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. COLLECTION AND DICTIONARY -, Abstract, Thesaurus-2 3, Abstract, Thesaurus-3 -1, Abstract, Thesaurus-3 Abstract, Thesaurus-i SPECIFIC REQUESTS GENERAL REQUESTS Average Rank of Number Average Rank of Number First Second of First Second of Relevant Relevant Requests Relevant Relevant Requests I I 8 9 1.1 2.1 I I 17 17 1.1 2.[OCRerr] I I 3.9 8.8 21 I I 2.3 7.9 18 1.1 g.[OCRerr] 20.0 5.1 10.6 21 6.5 I 18.2 17 mparison of Specific and General Requests using the Average Rank Position of the First and Second Relevant Documents to represent High Precision Need, (Thesaurus Dictionary) Fig. 20