Page 144 Concepts and similar pages

Concepts

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Evaluation
Information retrieval system
Information retrieval definition
Operational information retrieval
Experimental information retrieval
Data retrieval systems
Information measure
E measure
Relevance
Information content

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5 frequency of occurrence and co occurrence of index terms in the relevant and non relevant documents ...Chapter 7:Evaluation here I give a traditional view of the measurement of effectiveness followed by an explanation of some of the more promising attempts at improving the art ...Chapter 8:The Future contains some speculation about the future of IR and tries to pinpoint some areas of research where further work is desperately needed ...Information retrieval Since the 1940 s the problem of information storage and retrieval has attracted increasing attention ...In principle,information storage and retrieval is simple ...When high speed computers became available for non numerical work,many thought that a computer would be able to read an entire document collection to extract the relevant documents ...
183 42 ...43 ...44 ...45 ...46 ...
145 automatic and interactive retrieval system?Studies to gauge this are going on but results are hard to interpret ...It should be apparent now that in evaluating an information retrieval system we are mainly concerned with providing data so that users can make a decision as to 1 whether they want such a system social question and 2 whether it will be worth it ...The second question what to evaluate?boils down to what can we measure that will reflect the ability of the system to satisfy the user ...1 The coverage of the collection,that is,the extent to which the system includes relevant matter;2 the time lag,that is,the average interval between the time the search request is made and the time an answer is given;3 the form of presentation of the output;4 the effort involved on the part of the user in obtaining answers to his search requests;5 the recall of the system,that is,the proportion of relevant material actually retrieved in answer to a search request;6 the precision of the system,that is,the proportion of retrieved material that is actually relevant ...It is claimed that 1 4 are readily assessed ...
181 A short paper by Good [44]which is in sympathy with the approach based on a theory of measurement given here,discusses the evaluation of retrieval systems in terms of expected utility ...One conspicuous omission from this chapter is any discussion of cost effectiveness ...References 1 ...2 ...3 ...4 ...5 ...6 ...7 ...8 ...26,321 343 1975 ...9 ...10 ...11 ...12 ...13 ...14 ...15 ...16 ...17 ...18 ...
196 FARRADANE,J ...FISHER,L ...FOSTER,J ...FREDKIN,E ...FRITZCHE,M ...GARVIN,P ...GHOSE,A ...GOFFMAN,W ...GOFFMAN,W ...GOFFMAN,W ...GOFFMAN,W ...GOOD,I ...GOOD,I ...GOOD,I ...GOOD,I ...GOOD,I ...GOODMAN,L ...GOODMAN,L ...GOWER,J ...GOWER,J ...GRAY,J ...GUAZZO,M ...HARARY,F ...HARPER,D ...HARTER,S ...
12 Finally,every year a volume in the series Annual Review of Information Science and Technology is edited by C ...References 1 ...2 ...3 ...4 ...5 ...6 ...7 ...8 ...9 ...10 ...11 ...12 ...13 ...14 ...15 ...16 ...17 ...