IRS13
Scientific Report No. IRS-13 Information Storage and Retrieval
An Analysis of the Documentation Requests
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.
0
Manual Search of Abstracts aoncordance,
using Keywords and 7 Cut-offs
SMART Abstracts Thesaurus, using [OCRerr] Cut-offs
Identical to Marnial Search
Precision Precision
1.0
0.8
0.6
0.4
0.2
`````[OCRerr] Re Co II
0.8 1.0
0 0.2 0.4 0.6
Manual Search of Abstracts C
dance using Keywords an
Cut-offs
SW[OCRerr]RT Search of Abstracts Th
using Document Cut-offs
Levels
SMART Search of Abstracts Th
with Manual Important T
Request Modification, u
Document Cut-offs at al
1.0
0.8
0.6
0.4 \.½
0.2
I I
Re
0 0.2 OA 0.6 0.8 1.0
(a) (b)
ADI Abstracts, Macro Evaluation over 35 Requests.
Comparisons of a Hand Search in the KWIC Concordance with
SMART Searches Using Abstracts Thes[OCRerr]urus
Fig. 21.