IRS13 Scientific Report No. IRS-13 Information Storage and Retrieval 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]