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| Main Author: | |
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| Format: | Recurso educativo Open Access |
| Language: | en |
| Published: |
1968
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| Subjects: | |
| Online Access: | https://eric.ed.gov/?id=ED047760 |
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| _version_ | 1867181771945148416 |
|---|---|
| author | te Nuyl, Th. W. |
| author_facet | te Nuyl, Th. W. te Nuyl, Th. W. |
| collection | Education Resources Information Center |
| contents | Examination of the Validity of the Conclusions Arrived at in the Aslib Cranfield Research Project. te Nuyl, Th. W. Indexing Information Retrieval Library Research Performance Relevance (Information Retrieval) Reliability The Cranfield Project was done in a laboratory sphere. In a practical situation, it is impossible to determine how many documents are relevant to a certain question. Although in the Cranfield Project collections of different sizes have been used, these collections do not fulfill the requirements that the small collections are randomly taken from the larger one. On the contrary, all the relevant documents in the small collection are the same as those in the large collection. The research work done does not give information to what extent the sampling method gives practical results. A more attractive method would be to accept figures obtained in the Cranfield Project for recall ratios at various coordination levels. In the Cranfield Project, coordination level of 3 means that out of 7-10 search terms all possible combinations are taken, but are counted only once independent of which terms match. This is inherent to the scan-column index technique used in the project, which is not easy to imitate in operational systems using computers, machine punched cards or manual punched cards. (Author/MF) |
| format | Recurso educativo Open Access |
| id | eric_ED047760 |
| institution | ERIC Institute of Education Sciences |
| language | en |
| publishDate | 1968 |
| record_format | eric |
| spellingShingle | Examination of the Validity of the Conclusions Arrived at in the Aslib Cranfield Research Project. te Nuyl, Th. W. Indexing Information Retrieval Library Research Performance Relevance (Information Retrieval) Reliability Examination of the Validity of the Conclusions Arrived at in the Aslib Cranfield Research Project. te Nuyl, Th. W. Indexing Information Retrieval Library Research Performance Relevance (Information Retrieval) Reliability The Cranfield Project was done in a laboratory sphere. In a practical situation, it is impossible to determine how many documents are relevant to a certain question. Although in the Cranfield Project collections of different sizes have been used, these collections do not fulfill the requirements that the small collections are randomly taken from the larger one. On the contrary, all the relevant documents in the small collection are the same as those in the large collection. The research work done does not give information to what extent the sampling method gives practical results. A more attractive method would be to accept figures obtained in the Cranfield Project for recall ratios at various coordination levels. In the Cranfield Project, coordination level of 3 means that out of 7-10 search terms all possible combinations are taken, but are counted only once independent of which terms match. This is inherent to the scan-column index technique used in the project, which is not easy to imitate in operational systems using computers, machine punched cards or manual punched cards. (Author/MF) |
| title | Examination of the Validity of the Conclusions Arrived at in the Aslib Cranfield Research Project. |
| topic | Indexing Information Retrieval Library Research Performance Relevance (Information Retrieval) Reliability |
| url | https://eric.ed.gov/?id=ED047760 |