| Similarity |
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Snapshot |
| 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
... |
| 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
... |
| 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
... |
| 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
... |
| 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
... |
