IRE Index index Butterworth & Company Karen Sparck Jones All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, including photocopying and recording, without the written permission of the copyright holder, application for which should be addressed to the Publishers. Such written permission must also be obtained before any part of this publication is stored in a retrieval system of any nature. 346 Index [OCRerr]N1AR1 321 [OCRerr]pccd of rc[OCRerr]ponsc III [OCRerr]tcp[OCRerr] in pr[OCRerr])grammc I I S subjccti \ c n[OCRerr]l iibjcct i ve 1(15 technical information intervention, 1 21 tests, 23(1 validity, 137 time [OCRerr]i it[OCRerr]t ii 111) a[OCRerr]er [OCRerr]o opvratti)n I IX. 119 ii[OCRerr]er vflort II \ ilii[OCRerr] ul pr[OCRerr]tv[OCRerr]t I I X \[OCRerr] [OCRerr]irk [OCRerr]t it[OCRerr] m[OCRerr] nt[OCRerr] II 6 1 \h[OCRerr]iusttvitv I I [OCRerr] pCctv[OCRerr]l I ill[OCRerr]iut [OCRerr]4 I \pect[OCRerr](I rv[OCRerr] ill I \pcrtmental design, II I 3. 29 inalysis of data, 85 e()lICetiofl of dita, 83 databases. 71) document collection and database, 61 C\ aluati(in, 66 e\pliiring relationships, 97 inde\ing characteri[OCRerr]tics, 71 indexing I ingu [OCRerr]ges and pkicedurcs, 62 oumb[OCRerr]r()I quLrt[OCRerr]s 81 [OCRerr]iperat un iIt[OCRerr]t ng \ iriable[OCRerr], 61 people 65 pri)ee[OCRerr][OCRerr]ing quci te[OCRerr], 73 qiieriv[OCRerr] 63 \careb proec[OCRerr][OCRerr] 63 [OCRerr](iureL ot queries 73 treatments issigned to units, 78 I \perinlent ii units treatments assigned tii, 78 Fxperiment itton 145 eonststene\ 745 controlled I I contiolling se ire hing. 145 [OCRerr]IeIinitton 4 [OCRerr] I 3 eletcrmin ition of 59 cITicieney of 59 met hodolog\ 11)6 pragm ities of 59 162 present itton of re[OCRerr]uIts, 166 plirpose[OCRerr] of 9[OCRerr] qualitv of 3 [OCRerr]47 rcliabiltt\ of 59 Is u-factor. 79 usefulness, 326 I xplicitly probabilistic systems, 263 Fxplicitly utility-theoretic Systems, 263 Fxtrapolation problems, 166 F-test, 81 Faceted classification, 136, 147, 219, 221, 259 Failure analysis, 16 in Medlars, 26 Fallout, 66, 190 expected. 34 Filse drops, 38 Farradane's relational indexing, 234 Fitiguc factor, 8 1 Feedback, 9 relevance, 29 Filtering capacity of system, 111 (Jedanken experimentation, 199269 definition, 199 development of, 266 indexing and, 264 requester and, 2(15 system designers and, 266 Generality of theory, 53, 66 Go'del's theorem, 41 Greco-Latin squares, 86 Harter, 8.P., theory of, 21 Hawthorne effect, 148 Heisenberg principle, 148 Heuristic systems, 149 Hierarchial term arrangements, 318 Homeosemy, 48,52 Human aspects of information services, 165 Human performance, 151 Human preferences, 151 Hypotheses, 29, 143, 214 descriptive and explanatory, 215 evidence, 166 testing, 94 Input/output/outcome distinction, 169 Indexers, as gedanken experimenter, 264 communication with searchers, 123 consistency between, 63 Indexer/searcher memory, 269 Indexes, inverted file, 72 printed, comparisons, 142 search, 133 Indexing, 9, 167,317 accuracy of, 63 as gedanken experiment, 182 automatic, non-statistical, 242 non-using relevance information, 239 tests, 238 using relevance information, 241 automatic extraction, 21 characteristics of, 71 choice of, 144 criteria for, 12 evaluation and, 116 exhaustivity O{ 62, 236, 265, 275 in Cranfleld 2, 274