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. SPECIFIC REQUESTS GENERAL REQUESTS Average Rank of 1 Number Average Rank of Number First Second I of First Second 1 of Relevant Relevant I Requests Relevant Relevant Requests I I I Abstract, Stem 1.2 1 3.9 I 9 1.0 I 2.[OCRerr] I 8 I I I I 7.[OCRerr] 19.9' 17 l.[OCRerr] I [OCRerr] 17 I j I I I [OCRerr]-1, Abstract, Stem 11.1' 1 18.0' 21 [OCRerr].6 1 8.2 I 21 I I Abstract, Stem 11.1 I 20.2 17 [OCRerr] 12.6 18 [OCRerr]OLLECTI0N AND DICTIONARY -3, Abstract, Stem eleting one very bad request gives average ranks 2.0 and [OCRerr] )eleting one very bad request gives average ranks 6.0 and 13.0 iere requests have no second relevant, that request is not included in the average results] [OCRerr]mparison of Specific and General Requests using the Average Rank Position of the First and Second Relevant Documents to represent High Precision Need, (Stem Dictionary) Fig. 18