Web search and evaluation
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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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Web Search and Evaluation

How to find a web site

How to know it is useful

Summer Session


World Wide Web

  • Not the Internet

  • Hyperlinks

  • Text

  • Graphics

  • Sound

  • Video

Summer Session


Who builds the WWW?

ANYONE with access and interest

Summer Session


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


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


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


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


Common URL Errors

  • 5 Common errors when typing URLs

    • Leaving out a component

    • Incorrect domain designator

    • Punctuation errors

    • Missing punctuation

    • Misspelling words

Summer Session


Finding Information

  • Search Engines

    • Google, AltaVista

    • Meta Search Engines

      • Metacrawler, Dog Pile

  • Subject Directories

    • Yahoo, LookSmart

  • Specialized Databases

Summer Session


Which Search Engine?

  • Each engine returns different results

  • Different approaches for finding and storing pages

  • Check at least two search engines

Summer Session


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


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


Search Operators

  • Symbols can be useful

    • Term is required ( + )

      • Hair +red

    • Term is not wanted ( - )

      • Rock -music

    • Wildcard for missing letters ( * )

      • Vege*

Summer Session


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


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


Evaluate Information

  • Critically evaluate web sources

  • Assessment criteria

    • University of California Berkeley evaluation form

  • Spend enough time

Summer Session


Activity

  • Scavenger Hunt

    • Use search techniques

  • Web Evaluation

    • Use evaluation guidelines

Summer Session


Search phrase in “quotes”

Number of “hits”

Web site to research

Hyperlink

Google Search

Summer Session


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


Evaluation Example 2

  • 2. Scan the edges of the page

    • Author

    • Date

    • Credentials

Summer Session


Evaluation Example 3

  • 3. Indicators of quality

    • Well documented

    • Complete

    • Links

    • Other viewpoints or bias

Summer Session


Evaluation Example 4

  • 4. What do others say?

    • Links to page

    • Rated in directory

    • Author in Google?

Summer Session


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


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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