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| 10 |
In the past there has been much debate about the validity of evaluations based on relevance judgments provided by erring human beings
...Effectiveness and efficiency Much of the research and development in information retrieval is aimed at improving the effectiveness and efficiency of retrieval
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| 148 |
relevant to an information need if and only if it contains at least one sentence which is relevant to that need
...Earlier on I stated that this notion of relevance was only of limited use at the moment
...Saracevic [8]has summarised some of the more recent work on probabilistic interpretations of relevance
...Precision and recall,and others We now leave the speculations about relevance and return to the promised detailed discussion of the measurement of effectiveness
...It is helpful at this point to introduce the famous contingency table which is not really a contingency table at all
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| 3 |
that in IR we are searching for relevant documents as opposed to exactly matching items
...Many automatic information retrieval systems are experimental
...Many of the techniques I shall discuss will not have proved themselves incontrovertibly superior to all other techniques,but they have promise and their promise will only be realised when they are understood
...My aim throughout has been to give a complete coverage of the more important ideas current in various special areas of information retrieval
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