<DOC>
<DOCNO> IRS13 </DOCNO>
<TITLE> Scientific Report No. IRS-13 Information Storage and Retrieval </TITLE>
<SUBTITLE> Document Length </SUBTITLE>
<TYPE> chapter </TYPE>
<PAGE CHAPTER="5" NUMBER="34">
<AUTHOR1> E. M. Keen </AUTHOR1>
<PUBLISHER> Harvard University </PUBLISHER>
<EDITOR1> Gerard Salton </EDITOR1>
<COPYRIGHT MTH="December" DAY="" YEAR="1967" BY="National Science Foundation">
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
</COPYRIGHT>
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V-3~
EVALUATION NUMBER AND PERCENTAGE*
MEASUR[OCRerr] USED OF INDIVIDUAL REQUESTS
COLLECTION DICTIONARY TO DETIBINE TEXT ABSTRACT BOTH
MERIT SUPERIOR SUF[OCRerr]RIOR EQUAL
ADI Stem Normed. Recall 19 (57e6%) l[OCRerr] ([OCRerr]2.1+%) 2
Normed. Precision 17 ([OCRerr]8.6%) 18 (5i.i;[OCRerr]) 0
35
Requests Thesaurus-i Normed. Recall 20 (58.8%) l[OCRerr] (14i.4[OCRerr]) 1
Normed. Precision 21 (61.8%) 13 (38e2%) 1
* Percentages exclude requests where both equal.
Comparison of individual request merit, giving the numbers and percentages
of requests favoring text and abstracts on the ADI collection, according
to merit assigned by the normalized evaluation measures.
Figure 21.
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