IRS13 Evaluation Parameters chapter E. M. Keen Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. Interpolated Curve Recall Levels Cut-off, NQuasi C Method [OCRerr][OCRerr]0riginal `Step' Curve K [OCRerr] Document Cut-off, NpIeudo[OCRerr]CN Method Precision 1.0 re C ISIOn 1.0 0.8 0.8 0.6 - 0.6 - 0.4 0.4 0.2 0.2 I I I I I.I0[OCRerr] Recall I I l.0[OCRerr] Recol 0 0.2 0.4 0.6 0.8 Ranks of F[OCRerr]ve Relevant are l,2,[OCRerr],6,l3 a) Gurve for Individual Request [OCRerr] 268, Cran-l, Thesaurus-2, using Recall levels Cut-off - "[OCRerr]uasi Cranfield" Method. 0 0.2 0.4 0.6 0.8 Cran-l, Abstracts, Thesaurus-3. Macro Evaluation of 42 Requests. b) Average Curves to compare Cut-offs. Illustrations of the Recall Levels Cut-off - "[OCRerr]uasi-Cranfield" Method. Figure 16.