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 200 Document Cranfield Collection Averages Over 42 Requests, Abstracts Thesaurus-3 Overlap Cosine P-R-N Stiles [OCRerr]alized Recall .8404 * 8772 e8654 .8760 in alized Precision .6205 .6815 .6098 .6727 OVERLAP COSINE P-R-N STILES [OCRerr] PREC S.D. PREC S.D.D. PREC S.D.D. PREC S.D )5 .5245 .4022 .5688 .4894 .4o76 .4582 .54o8 .49 0 .5245 .4022 .5688 .4894 .4o84 .4576 .5408 .49 -5 .5229 .3995 .5655 .4871 .4100 .4530 .5375 .49 ?O .5051 .3822 .5550 .4716 .4043 .4362 .5278 .48. -`5 .4829 .3714 .5432 .4517 .3957 .4264 .5143 [OCRerr] .4578 .3607 .5301 .4215 .3813 .4126 .5015 43 [OCRerr] .4438 .3512 .5193 .3955 .3660 .3928 .4908 .41 [OCRerr] .4315 .3459 .5019 .3694 .3548 .3771 .4735 .393 [OCRerr]5 .4153 .3374 .4844 .3376 .3411 .3603 .4593 35 )0 .3962 .3375 .4680 .3198 .3294 .3571 .4459 .34[OCRerr] )5 .3803 .3242 .4492 .2960 .3121 .3429 .4346 .323 `0- .3650 .3150 .4258 .2790 .2965 .3289 .4201 .30[OCRerr] )5 .3523 .3117 .3940 .2616 .2822 .3103 .3967 .28 [OCRerr] .3382 .3096 .3668 .2487 .2700 .2970 .3707 .273 [OCRerr] .3225 .3067 .3458 .2438 .2585 .2900 .3466 .26 [OCRerr] .2978 .2938 .3260 .2355 .2388 .2614 .3258 [OCRerr] .2728 .2845 .3122 .2313 .2217 .2408 .3090 .253 [OCRerr] .2472 .2794 .2967 .2258 .2039 .2260 .2903 .24' [OCRerr] .2217 .2798 .2808 .2246 .1872 .2223 .2691 .24[OCRerr] )O .1966 .2862 .2649 .2287 .1706 .2319 .2476 .24[OCRerr] Recall Precision Table (Cranfield Collection) Table 4