Characteristics of Information on the Web Dania Bilal IS 530 Fall 2005.

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Presentation transcript:

Characteristics of Information on the Web Dania Bilal IS 530 Fall 2005

The Web  Heterogeneous  Dynamic  Hypertext & hypermedia cognitive overload disorientation

The Web  Structure of information  Information overload  Authority  Inappropriate materials Filtering issues

Web Spaces  Search /directory space  Web browser space Navigation efficiency  Variables Navigation effectiveness  Variables

Web Spaces Search engine Web browser

The Web  Text-centered (mostly)  Efforts to read texts online  Advertisements  Instant gratification  Exploration & discovery

The Web  Plagiarism  Evaluation of retrieved information  Relevance judgment  Social issues  Information literacy

The Web  Mental maturity (content vs. ads)  Reading long texts online  Sifting through K-Z of results  Composing adequate search strings  Identification of authoritative information

Web Databases  System-based relevance (Google: popularity ranking)  Sponsored sites may appear first  Lacks structure (no thesauri, controlled vocabulary, etc.)  Lacks authority  System-based relevance (other methods)  No sponsored sites  Well-structured (thesauri, controlled vocabulary, metadata standards, etc.)  Authoritative

Web Databases  Information overload Cognitive overload Gratification vs. negative affect  Engines more general in nature  Item availability is questionable (dead links, error codes)  Less information overload cognitive overload varies Gratification >positive affect  Many specialized databases  Item availability?

How Search Engines Work? Search Engine Resources  article.php/ (how search engines work) article.php/  source.htm (search engine resources) source.htm  ml (recommended search engines) ml