CRANV2 Simulated ranking and document output cut-off chapter Cyril Cleverdon Michael Keen Cranfield An investigation supported by a grant to Aslib by the National Science Foundation. Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. - 214 - IOO 95 90 85 [OCRerr]O 75 70 65 60 -J 55 ._] 4 (') 50 LU rr [OCRerr] 4s 40 35 30 25 20 15 I0 5 \ \ I \ \ \ ® ¢ \ \® \ \ \ \\ J 5 I0 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 I00 °Io PIA£CI SION FIGURE 5.20P COMPARISON OF PERFORMANCE, BASED ON DOCUMENT OUTPUT CUT-OFF, FOR COLLECTIONS OF 1,400 AND 200 DOCUMENTS WITH INDEX LANGUAGE I.l .a AND 42 QUESTIONS. + 1,400 Document collection, o 200 Document Collection