IRS13 Scientific Report No. IRS-13 Information Storage and Retrieval 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. Specific Requests (21) General Requests (21) 0.001 Specific Requests (21) General Requests (21) 0.005 - 1.0 - 0.01 .8 - 0.05- .6 - 0.I .4 - 0.5 - .2 - 1.0 I I I I 0.2 0.4 0.6 0.8 1.0 .2 .4 .6 .8 1.0 a) System Efficiency Evaluation b) User Satisfaction Evaluation Cran-1 Abstracts Stem, Micro Evaluation, pseudo-Cranf jeld Cutoff, Averages over 21 Requests Fig. 29