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Web Search and Evaluation

Web Search and Evaluation How to find a web site How to know it is useful World Wide Web Not the Internet Hyperlinks Text Graphics Sound Video Who builds the WWW? ANYONE with access and interest URL Example - http://asu.edu/directory Uniform Resource Locator

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Web Search and Evaluation

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  1. Web Search and Evaluation How to find a web site How to know it is useful Summer Session

  2. World Wide Web • Not the Internet • Hyperlinks • Text • Graphics • Sound • Video Summer Session

  3. Who builds the WWW? ANYONE with access and interest Summer Session

  4. URL Example - http://asu.edu/directory • Uniform Resource Locator • URL is like a card catalog • Naming scheme for resources • URL has 4 components • Protocol [http://] • Domain name [asu] • Domain designator [edu] • Suffix(es) [directory] Summer Session

  5. a b c d URL Practice 1 • Find the components for this URL [a = protocol, b = domain name, c = domain designator, d = suffix(es)] http://www.microsoft.com/ windows/ie/default.html Summer Session

  6. a b c URL Practice 2 • This is the URL for your web site at ASU. [a = protocol, b = domain name, c = domain designator, d = suffix(es)] http://www.public.asu.edu/~asurite/index.html d d Summer Session

  7. Common names .com .gov .net .org .edu .mil Countries .cn (China) .de (Germany) .jp (Japan) .uk (United Kingdom) New names .biz .museum .info Domain Designator Summer Session

  8. Common URL Errors • 5 Common errors when typing URLs • Leaving out a component • Incorrect domain designator • Punctuation errors • Missing punctuation • Misspelling words Summer Session

  9. Finding Information • Search Engines • Google, AltaVista • Meta Search Engines • Metacrawler, Dog Pile • Subject Directories • Yahoo, LookSmart • Specialized Databases Summer Session

  10. Which Search Engine? • Each engine returns different results • Different approaches for finding and storing pages • Check at least two search engines Summer Session

  11. keyword Where do echinoderms, or sea urchins, live? phrase Research Questions • Define your question • Find unique key words • Find phrases • Be prepared to find new words and phrases Summer Session

  12. Search Techniques • Word Searches • Use specific key words • Not common words: the, an, a • Example: echinoderm • Phrase Searches • Phrases in quotes • Example: “sea urchin” • Advanced search feature Summer Session

  13. Search Operators • Symbols can be useful • Term is required ( + ) • Hair +red • Term is not wanted ( - ) • Rock -music • Wildcard for missing letters ( * ) • Vege* Summer Session

  14. Boolean Searches • Boolean Searches • Use operator words • AND, OR, and NOT operators • Jamaica AND geography • French OR francaise • sailboats NOT yachts • NEAR operator • browser NEAR performance Summer Session

  15. Reliability & Validity • Reliability • Can you get that same information again? • Is the information current? • Are there links to other pages, do other pages link to this information? • Validity • Is the information about your topic? • Does the domain designator make sense for the topic? • Is the author credible? Summer Session

  16. Evaluate Information • Critically evaluate web sources • Assessment criteria • University of California Berkeley evaluation form • Spend enough time Summer Session

  17. Activity • Scavenger Hunt • Use search techniques • Web Evaluation • Use evaluation guidelines Summer Session

  18. Search phrase in “quotes” Number of “hits” Web site to research Hyperlink Google Search Summer Session

  19. Evaluation Example 1 • 1. Look at the URL before you go to the page • Personal page or site • Type of domain • Appropriate for content • Published by entity that makes sense (corresponds to name of site) www.stanford.edu/group/Urchin/ Summer Session

  20. Evaluation Example 2 • 2. Scan the edges of the page • Author • Date • Credentials Summer Session

  21. Evaluation Example 3 • 3. Indicators of quality • Well documented • Complete • Links • Other viewpoints or bias Summer Session

  22. Evaluation Example 4 • 4. What do others say? • Links to page • Rated in directory • Author in Google? Summer Session

  23. Evaluation Example 5 • 5. Does it all add up? • Why is this page on web? • Was it meant to be humorous or ironic? • Bottom Line – as good as or better than other resources? • YES Summer Session

  24. Website http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/FindInfo.html Visit this site for the web evaluation checklist and additional information about search engines and web searching techniques Summer Session

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