ISR10 Table of Contents table of contents 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. I TABI[OCRerr] OF CO[OCRerr][OCRerr][OCRerr]S (continue&{ [OCRerr]age CFAP[OCRerr]ER 5 [OCRerr]VALUATION OF DOCUME[OCRerr] R[OCRerr][OCRerr]RIEVAL SYS[OCRerr]S 5-1 1. The Gerieral Fro[OCRerr]1em 5-1 2. [OCRerr]va1uatiori Neasures an[OCRerr] trie Collectiori o[OCRerr] Statistics 5-2 A. The Idea1ize[OCRerr] [OCRerr][OCRerr]periment 5-2 [OCRerr]. Eva1uatio[OCRerr] Statistics 5-6 C. Output Cliaracterizatioix D. The Precision-Reca[OCRerr]1 Tra[OCRerr]eo££ . 5-15 3. The Use o[OCRerr]. Optimal [OCRerr]ueries in [OCRerr]est Desi[OCRerr] 5-17 4. Cutoff-In[OCRerr]epen[OCRerr]ent Per[OCRerr]ormance In[OCRerr]ices 5-19 A. Derivation ................... 5-19 B. [OCRerr]xperimental Use 5-29 Appen[OCRerr]ix A - The S[OCRerr]ART System A-i ix