IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
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-is
Frequency 3 4 5-6 7-8 9-10 11-19 20+ all
of words
3 61% 55% 59% 73% 83% 77% 77% 68%
4 67% 65% 80% 80% 82% 70% 72%
5-6 100% 80% 79% 78% 78% 81%
7-8 67% 100% 100% 64% 78%
9-10 50% 100% 100% 94%
11-19 50% 67% 63%
20+ 88% 88%
Significant Associations Using Local Pairs
Table 4