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UTK IS 530 - Characteristics of Information on the Web

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Characteristics of Information on the WebThe Web isThe WebThe Web hasWeb SpacesThe Web isThe Web requiresThe Web requiresThe WebWeb vs. DatabasesSlide 11How Search Engines Work? Search Engine ResourcesCharacteristics of Information on the WebDania BilalIS 530Spring 2005The Web is heterogeneousdynamichypertext-basedmay create a cognitive overload and disorientation on usershas a high level of abstractionThe Web lacks structurehas redundant informationlacks authoritycontains inappropriate materials that require filteringThe Web hasa search engine space a Web browser spaceThese spaces requires adequate knowledge of navigationWeb SpacesSearch engine Web browserThe Web ispredominantly text-centered (i.e., time for online reading is needed to locate information)full of ads that may distract usersThe Web requiresmental maturity to discern between content and advertisementsability to read long texts onlineability to compose search requestsability to evaluate resultsThe Web requirespatience!ability to browse hierarchies with multiple layersPlacing a topic within an appropriate subject hierarchy may be difficult for young users, for example.The WebRequires ability to make relevance judgmentsystem-based relevance is misleading System-based relevance varies among search enginesWeb vs. DatabasesSpeed (Simple interface)System relevance is misleadingSponsored sites appear on top of results regardless of relevanceLack of structure (no thesauri, controlled vocabulary, etc.)Lack of authoritySpeeds variesSystem relevance is based on specific methods No sponsored sites; relevance may be more objective Well-structured (thesauri, controlled vocabulary, metadata standards, etc.)AuthoritativeWeb vs. DatabasesInformation overloadCognitive overloadnegative affectGeneral with few specialized databasesItem availability is questionableSimple and advanced featureLess information overloadLess cognitive overloadPositive affectSpecialized databases with a few general onesItem availability can be linkedSimple and advanced featuresHow Search Engines Work? Search Engine Resourceshttp://searchenginewatch.com/webmasters/article.php/2168031 (how search engines work)http://www.searchengineworld.com/misc/resource.htm (search engine resources)http://www.lib.berkeley.edu/Help/search.html (recommended search


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