ISR11 Design Criteria for Automatic Information Systems chapter M. E. Lesk G. Salton Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. 0 [OCRerr] Full Null 0 ox Abstract Full Null [OCRerr] Full Text Null Ox Null Concon Null Concon x Null Concon RECISION PRECISION PRE phISION C .0' 0 0 8 \0 .6' [OCRerr] `4 O[OCRerr]x 0 1.0 - 1.0 0.8 0.8 0.6- 0.6 0.4- 0.4- [OCRerr]o[OCRerr]x x[OCRerr]o[OCRerr] x[OCRerr]o[OCRerr] x[OCRerr]o[OCRerr] 2 0.2 - 0.2 - a .RECALL a a a *RECALL a a a . . RECA 0 0.2 OA 0£ Q8 1.6 0 0.2 0.4 0.6 0.8 1.0 0 Q2 OA 0.6 0.8 1.0 a) IRE-2 b) Cronfield c) ADI (17 requests) (42 requests) (35 requests) Comparison of Simple Word Stem Match (Full Null) with Statistical Word-Word Associations (Null Concon) Fig. 11