-
Saracevic, T.: On a method for studying the structure and nature of requests in information retrieval (1983)
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- Language
- e
- Pages
- S.22-25
- Series
- Proceedings of the American Society for Information Science; vol. 20
-
Saracevic, T.: Relevance: a review of and a framework for the thinking on the notion in information science (1975)
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- Footnote
- Vg. auch die Beiträge in: Journal of the American Society for Information Science and Technology 58(2007) no.13, S.1915-1933 (Relevance: A review of the literature and a framework for thinking on the notion in information science. Part II: nature and manifestations of relevance) und S.2126 - 2144 (Relevance: A review of the literature and a framework for thinking on the notion in information science. Part III: Behavior and effects of relevance).
- Language
- e
-
Saracevic, T.: Information retrieval (1985)
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- Language
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- Pages
- Chpt.4, S.1-29
-
Saracevic, T.: Information science (1999)
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- Date
- 17. 1.2000 13:19:20
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Spink, A.; Saracevic, T.: Human-computer interaction in information retrieval : nature and manifestations of feedback (1998)
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- Date
- 30. 5.1999 20:38:46
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Saracevic, T.: Ciencia da informacao, origem, evolucao e relacoes (1996)
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- Date
- 29. 1.1996 18:23:13
-
Spink, A.; Wolfram, D.; Jansen, B.J.; Saracevic, T.: Searching the Web : the public and their queries (2001)
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- Abstract
- In previous articles, we reported the state of Web searching in 1997 (Jansen, Spink, & Saracevic, 2000) and in 1999 (Spink, Wolfram, Jansen, & Saracevic, 2001). Such snapshot studies and statistics on Web use appear regularly (OCLC, 1999), but provide little information about Web searching trends. In this article, we compare and contrast results from our two previous studies of Excite queries' data sets, each containing over 1 million queries submitted by over 200,000 Excite users collected on 16 September 1997 and 20 December 1999. We examine how public Web searching changing during that 2-year time period. As Table 1 shows, the overall structure of Web queries in some areas did not change, while in others we see change from 1997 to 1999. Our comparison shows how Web searching changed incrementally and also dramatically. We see some moves toward greater simplicity, including shorter queries (i.e., fewer terms) and shorter sessions (i.e., fewer queries per user), with little modification (addition or deletion) of terms in subsequent queries. The trend toward shorter queries suggests that Web information content should target specific terms in order to reach Web users. Another trend was to view fewer pages of results per query. Most Excite users examined only one page of results per query, since an Excite results page contains ten ranked Web sites. Were users satisfied with the results and did not need to view more pages? It appears that the public continues to have a low tolerance of wading through retrieved sites. This decline in interactivity levels is a disturbing finding for the future of Web searching. Queries that included Boolean operators were in the minority, but the percentage increased between the two time periods. Most Boolean use involved the AND operator with many mistakes. The use of relevance feedback almost doubled from 1997 to 1999, but overall use was still small. An unusually large number of terms were used with low frequency, such as personal names, spelling errors, non-English words, and Web-specific terms, such as URLs. Web query vocabulary contains more words than found in large English texts in general. The public language of Web queries has its own and unique characteristics. How did Web searching topics change from 1997 to 1999? We classified a random sample of 2,414 queries from 1997 and 2,539 queries from 1999 into 11 categories (Table 2). From 1997 to 1999, Web searching shifted from entertainment, recreation and sex, and pornography, preferences to e-commerce-related topics under commerce, travel, employment, and economy. This shift coincided with changes in information distribution on the publicly indexed Web.
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Saracevic, T.: ¬The concept of 'relevance' in information science : a historical review (1970)
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Saracevic, T.: Charting the future of information science (1990)
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Saracevic, T.; Kantor, P.: ¬A study of information seeking and retrieving : pt.2: users, questions, and effectiveness (1988)
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Saracevic, T.; Kantor, P.: ¬A study of information seeking and retrieving : pt.3: searchers, searches, and overlap (1988)
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Brenner, E.H.; Saracevic, T.: Indexing and searching in perspective (1985)
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Wolfram, D.; Spink, A.; Jansen, B.J.; Saracevic, T.: Vox populi : the public searching of the Web (2001)
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Jansen, B.J.; Spink, A.; Saracevic, T.: Real life, real users and real needs : a study and analysis of users queries on the Web (2000)
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Saracevic, T.: Measuring the degree of agreement between searchers (1984)
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Saracevic, T.; Kantor, P.: Online searching : still an imprecise art (1991)
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Belkin, N.J.; Chang, S.J.; Downs, T.; Saracevic, T.; Zhao, S.: Taking account of user tasks, goals and behavior for the design of online public access catalogs (1990)
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Saracevic, T.: ¬A research project on classification of questions in information retrieval : preliminary work (1980)
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Saracevic, T.: Why is relevance still the basic notion in information science? (2015)
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Saracevic, T.: Information science (2009)
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- Footnote
- Vgl.: http://www.tandfonline.com/doi/book/10.1081/E-ELIS3.
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- e
