IRS13 Correlation Measures chapter K. Reitsma J. Sagalyn Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. The 82 Document ADI Collection Averages Over 35 Requests, Abstracts Thesaurus Cosine }[OCRerr]ersine M-K R-S 3 [OCRerr]rmali zed Recall .8oo6 .7794 .5308 .6187 [OCRerr]braalized Precision 6o86 .5231 .3381 4056 COSINE MYPERSI[OCRerr]E PREC S.D. I[OCRerr]EC S.D.D. .05 .64oo .3936 [OCRerr][OCRerr][OCRerr]3458 .10 .6399 .3937 .3891 .3451 .15 .626o .3850 .3941 .3552 .20 .6097 .3784 .3904 .3546 .25 .584o .3714 .3724 .3356 .30 .5527 .3610 .3549 .3076 .35 .5214 .3613 .3415 .2983 .40 .4915 .3665 .3361 .2962 .45 .4663 .3647 .3318 .2943 .50 .4448 .3667 .3269 .2957 .55 .4279 .3513 .3153 .2738 .60 .4097 .3398 .2998 .2595 .65 .3898 .3306 .2826 .2535 `70 .3617 .3086 .2667 .2477 `75 .3319 .2877 .2504 .2510 8o .3103 .2725 .2320 .2298 .85 .2867 .2570 .2135 .2104 90 .2616 .2434 .1926 .1965 95 .2340 .2288 .1686 .1917 00 .2070 .2217 .1452 .1953 Recall Precision Table (ADi Collection) Table 3 PREC M-K R-S S.D.D. .2596 .47[OCRerr] .2561 .4764 .2430 .4677 .2346 .4588 .2323 .4596 .2287 .4535 .2236 .4492 .2154 .4373 .2029 .4102 .1894 .3948 .1735 .3649 .1564 .3471 .1409 .3343 .1278 .3117 .1161 .2884 .1053 .2737 .0970 .2563 .0892 .2422 .0812 .2293 .0733 .2237 PREC .3879 .3804 .3707 .3536 .3357 .3072 .2839 .2633 .2484 .2266 .2062 .1881 .1715 .1577 .i44~ .1348 .1267 .1186 .1118 .1046