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Saracevic, T.: Relevance: a review of and a framework for the thinking on the notion in information science (1975)
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Spink, A.; Saracevic, T.: Sources and use of search terms in online searching (1992)
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Spink, A.; Saracevic, T.: Search term selection during mediated online searching (1993)
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Spink, A.; Saracevic, T.: Human-computer interaction in information retrieval : nature and manifestations of feedback (1998)
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Saracevic, T.; Mokros, H.; Su, L.: Nature of interaction between users and intermediaries in online searching : a qualitative analysis (1990)
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Spink, A.; Saracevic, T.: Dynamics of search term selection during mediated online searching (1993)
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Mokros, H.B.; Mullins, L.S.; Saracevic, T.: Practice and personhood in professional interaction : social identities and information needs (1995)
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Bellardo, T.; Saracevic, T.: Online searching and search output : relationships between overlap, relevance, recall and precision (1987)
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Spink, A.; Saracevic, T.: Interaction in information retrieval : selection and effectiveness of search terms (1997)
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Saracevic, T.: Ciencia da informacao, origem, evolucao e relacoes (1996)
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Saracevic, T.; Kantor, P.B.: Studying the value of library and information services : Part I: Establishing a theoretical framework (1997)
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Saracevic, T.; Kantor, P.B.: Studying the value of library and information services : Part II: Methodology and taxonomy (1997)
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Saracevic, T.; Kantor, P.; Chamis, A.Y.: ¬A study of information seeking and retrieving : pt.1: Background and methodology (1988)
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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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Kantor, P.B.; Saracevic, T.: Quantitative study of the value of research libraries : a foundation for the evaluation of digital libraries (1999)
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Saracevic, T.: Relevance: a review of the literature and a framework for thinking on the notion in information science. Part III : behavior and effects of relevance (2007)
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Saracevic, T.: Effects of inconsistent relevance judgments on information retrieval test results : a historical perspective (2008)
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Saracevic, T.: Relevance: a review of the literature and a framework for thinking on the notion in information science. Part II : nature and manifestations of relevance (2007)
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