ISR10 The Query-Document Matching Function chapter Joseph John Rocchio Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. Category No. of Cumulative Overlap Overlap Category Rank Elements No. of Correlation Correlation Recall Normal Recall Elements 1st 15 1st 30 1 27 27 .54 .52 .55 .85 20 2 24 49 .71 .61 .71 .92 Categories 3 26 72 .79 .71 .78 .95 4' 25 95 .84 .79 .88 .97 5 25 116 .88 .83 .91 .98 1 Is 18 .54 .63 .51 .79 30 18 34 .71 .57 .69 .87 Categories 3 18 51 .78 .67 .82 .92 4 18 68 .84 .72 .83 .95 5 17 82 .86 .77 .86 .97 :1 12 12 .50 .71 .42 .72 2 13 25 .60 .56 40 .63 .82 Ca tegories 3 12 37 .73 .60 .72 .89 .4 13 49 .78 .68 .78 .92 5 12 61 .84 .73 .82 .94 Average Evaluation Results for 24 Search Request[OCRerr] Figure 4.13