IRS13 Word-Word Associations in Document Retrieval Systems chapter M. E. Lesk Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. 0.9 0.8 Cosine (.46) Overlap (.6) 0.7 Frequencies 6m90 0.6 C 0 Co Cu- [OCRerr] 0.4 0.5 0.3 0.2 0.l *\¾A.¾ I I I I I I I I I I 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Recall Recall-precision Curves for Association Runs - Cranfield Collection Effect of Correlation Mode Fig. B