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. Ix-" Frequency 3 4 5-6 7-8 9-10 11-19 20+ all of words 3 19% 10% 11% 13% 16% 14% 15% 14% 4 0% 9% 0% 40% 18% 20% 12% 5-6 12% 33% 16% 22% 19% 21% 7-8 0% 0% 20% 0% 5% 9-10 0% 43% 25% 25% 11-19 50% 29% 33% 20+ 37% 37% Dependence of Word-Pair significance On Word Frequency Table 3 Note: the `all' column shows the percentage of significant correlations among all pairs which have the frequency of their lower frequency word indicated by the row frequency; not the percentage among all pairs with a word of the indicated frequency either as maximum or minimum frequency component.