CRANV2
Aslib Cranfield Research Project: Factors Determining the Performance of Indexing Systems: Volume 2
Supplementary tests and results
chapter
Cyril Cleverdon
Michael Keen
Cranfield
An investigation supported by a grant to Aslib by the National Science Foundation.
Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government.
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QUESTION RELEVANT INDEX LANGUAGE
NUMBER DOCUMENTS I. 1 1.5 1.8 II.l II.5 II. lO II.15 III. l III. 6
118 1324 4[OCRerr] 4 5 3 4= 4= 4= 4=
1378 4= 5 4 3= 4 4= 4= 4= 4=
1666 1= 1 3 1= 1= 2= 2= 1= 1=
1667 1= 2= 1= 3= 4= 1 1 1= 1=
1670 1= 2-- 1= 1-- 1= 2= 2= 1= 1=
170 1360 1 1 1 1 1 1 1 1 1
1605 2 2 2 2 2 2 2 2 2
25O 1311 1= 1= 1= 1= 1= 1= 1-- 1= 1=
1316 4= 4= 4-- 1= 1= 4= 1= 4= 4=
1335 6= 7= 7= 4= 4= 4= 5= 7= 8=
1415 1= 1= 1= 4= 1= l= i
1; 1= 1=
1416 1= 1-- 1= 7= 4= 1= [
: 1= 1= 1=
1798 4= 4= 4= 1= 4= 4= 5= 4= 4=
2364 6= 4= 4= .4= 4= 4; 5= 6 6=
2367 6-- 7= 7= 7= 4= 8 5= 7= 6=
HIGHEST RANKED
DOCUMENTS LOWEST RANKED
DOCUMENTS
Maintained Changed Maintained Changed
INDEX LANGUAGE Position Position Position Position
GROUP
I SINGLE> TERMS 33 3 33 1
SIMPLE CONCEPTS 26 7 28 2
III CONTROLLED TERMS 30 6 29 4
J
FIGURE 6.24T
RANKED ORDER OUTPUT FOR RELEVANT
DOCUMENTS OF QUESTIONS 118, 170 AND
250 BY NINE INDEX LANGUAGES
FIGURE 6.25T
EFFECT ON RANK OF HIGHEST AND LOWEST
RANKED DOCUMENTS IN MOVING TO DIFFERENT
INDEX LANGUAGE FOR 42 QUESTIONS