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Nyhetssöktjänster på webben: En utvärdering av News Index, Excite News Search och Ananova
University of Borås, Swedish School of Library and Information Science.
2001 (Swedish)Independent thesis Advanced level (degree of Master (One Year))Student thesisAlternative title
News search engines on the Web : An evaluation of News Index, Excite News Search and Ananova (English)
Abstract [en]

The purpose of this study is to examine the retrieval performance of three search engines, specialized in retrieving news articles: News Index, Excite News Search and Ananova. Thirty questions, grouped into three categories – politics, economy and sports, were used and the first twenty documents for each question were examined. The questions used were designed to be as current as possible and efforts were made to perform the searches with as little time span as possible between each search engine. The precision of the search engines was determined for each of the questions as well as for each category and for the combined categories. In measuring precision an average was calculated, intended to favour search engines that place its relevant documents early in the ranked list. The relevance of the retrieved documents was evaluated using a three-grade scale. Irrelevant articles and duplicates were given 0 points, partially relevant documents were given 0,5 points and those judged to be highly relevant were given 1 point. The results of the study show surprisingly high precision from two of the search engines, Excite and News Index with the former performing slightly better than the latter. Ananova performed considerably worse than the other two. One possible reason for the high precision observed is the relatively low complexity of the documents retrieved compared to web pages in general. When comparing the different categories of questions one notable result was that all search engines performed considerably worse in the "economy"-category. Possible reasons for this are, apart from a higher number of duplicates, a shortage of relevant articles for the questions in this category as well as possible differences between either the documents retrieved in the different categories, or the web pages publishing them.

Place, publisher, year, edition, pages
University College of Borås. Swedish School of Library and Information Science , 2001.
Series
Magisteruppsats i biblioteks- och informationsvetenskap vid Bibliotekshögskolan/Biblioteks- och informationsvetenskap, ISSN 1404-0891 ; 2001:76
Keywords [en]
internet, WWW
Keywords [sv]
nyheter, söktjänster, vertikala sökmaskiner, nyhetssökmaskiner
National Category
Social Sciences
Identifiers
URN: urn:nbn:se:hb:diva-18320Local ID: 2320/1633OAI: oai:DiVA.org:hb-18320DiVA, id: diva2:1310236
Note
Uppsatsnivå: DAvailable from: 2019-04-30 Created: 2019-04-30

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf