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. 1-32 0.00005 0.0001 0.0002 0.0005 0.001 0.002 C u- 0.00~ 0.01 0.0[OCRerr] 0.05 0.1 0.2 Requests searched on IRE-I collection Requests searched on IRE-3 collection L 0.5 l.C 0.1 0.2 0.3 0.4 0.5 Recall 0.6 0.7 0.8 0.9 1.0 IRE Collections, Abstracts, Stem Dictionary, Micro Averages over 17 Requests, Pseudo-Cranfield Cut-off Performance Comparison of the 17 Staff preferred Requests Search on the two Document Collections. Fig. l[OCRerr]