IRS13 Document Length 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. V-30 COLLECTION DICTIONARY EVALUATION ABSTRACT TEXT MEASURE Suffix 15t Normed. Recall .7253 .7520 Normed. Precision .[OCRerr]997 .5308 Stem Normed. Recall .7601 e7779 Normed. Precision e5326 .5573 Thesaurus-i Normed. Recall .8016 .8206 (Harris) Normede Precision .6069 .6273 ADI Thesaurus-2 Normed. Recall .75148 .77714 35 (Hastie) Normed. Precision .5190 .[OCRerr]1414i Requests Suffix t[OCRerr]t, Normed. Recall .7296 .7768 Cosine Logical Normed. Precision .5o1414 .51462 Stem, Cosine Normed. Recall .75146 .7695 Logical Normed. Precision .5221 .52148 Stem, Overlap Normed. Recall .7[OCRerr]23 .714314 Logical Normed. Precision .149014 .14978 Performance Results comparing abstracts with full text for seven results on the ADI Collection, using normalized recall and precision. Figure 18.