“Web Searching & Evaluation” LIS 5603, Intro to Information Services Dr. Lorri Mon College of Communication & Information
Evaluating SourcesLast week, we searched for sources toanswer the question. We found 12sources.Suppose you have to pick three of theseto use in an answer – which three wouldyou choose?See our 12 sources here:http://fsuinfoservices.wordpress.com/questions/
Results – an exercise in Evaluation• What three sources does our class choose, and why?
AnswersThe IPL2 answer :http://2011.ispace.ci.fsu.edu/~lmon/wk3-leonardoanswer.txtIssues/Rationale:• What sources did Dr. Mon end up choosing to answer this question, and why?• What did the final answer look like in IPL2 format, and any notable issues there?
Cognitive AuthorityPatrick Wilson writes that “beyond our owndirect experience, all we know of the world ishearsay.” How do we decide which hearsayto trust – which has “cognitive authority”? Credibility, competence, trustworthiness, reputation, intrinsic plausibility, believability/appearanceWilson, Patrick (1983), “Cognitive Authority” in Second-HandKnowledge : an Inquiry into Cognitive Authority. Westport, Conn. :Greenwood Press, 13-37.
Investigating a Site“About” page / “Contact” page of the siteWhois – site owner informationhttp://www.networksolutions.com/whois/index.jspAlexa – rankings, traffic and usershttp://www.alexa.com/
Questions in Resource Evaluation• Who is the audience? • When is it updated?• What is the purpose? • What does it cover?• Who is the creator? • How is it used?• How is it organized? • What makes it unique? AND• Why choose this resource, as opposed to others? CONSIDERATIONS: Coverage, Currency, Accuracy, Authority, Appropriateness, Perspective, Presentation/Design, Usability, Cost
Favorite Search Engines?What search engine do you most often use?
Here’s another Google Search to try: related:www.libraryjournal.com
Google Search Tricks #3What’s Happening Here?Try this Google search:~digital "reference librarian"(tilde in front of digital)
Google Search Tricks #4What’s Happening Here?Try this Google search:Chocolate * * cakeOr if you prefer pie –Peach * * pie
Google Search Tricks #5Other “Wild Card” Google Searches Salami has * calories Denver has * population Take a number or fact in a question and search it as a statement with the * in place of the missing information.
Bing Search #1What’s Happening HereTry searching this with the Bing search engine at http://www.bing.com/who got what when
Internet Search Basics• Search engine ‘spiders’ index Web pages & create an inverted file (words & frequencies; stop words) Cow appears : 2x in doc1, 1x in doc2, 1 in doc3• Inverted file is searched, matches ranked and returned (e.g. “cow” in urls, titles, link text, anchor links, page text) Retrieval ranking influences: Cow is in URL of doc1, is 2x in text, 3 links to it use word “cow” as external link, and “cow” is an anchor link from top of page to lower paragraph
Boolean Searching+ AND digital AND reference (has both)| OR e-mail OR chat (has either)- NOT spice NOT girls (omits one) (mime | pantomime) +history -wiki Phrase searching with Boolean:“digital reference” OR “virtual reference” NOT wiki“digital reference” | “virtual reference” –wiki
Subject/Specialty SearchingKidRex(Kids) Age appropriatehttp://www.kidrex.org/USA.GOV (Govt) Authoritativehttp://www.usa.govScirus (Science) Subject Focusedhttp://www.scirus.comInternet Archive Historic (and “deep web”)http://www.archive.orgDmoz Open Directory Browsinghttp://dmoz.org Search Engine Relationships Chart – Bruce Clay Inc. http://www.bruceclay.com/searchenginechart.pdf
Dr. Mon’s Favorite Techniques1. Concept analysis. What words and phrases might be in a perfect site? Search, click on resulting pages, use words/phrases from those pages to run new searches.2. Limiting the domain. On Google, site:.gov limits to only government sites. You could do site:.edu or -site:.com for searches limiting results to education sites, or eliminating commercial sites.3. Phrase searching plus keywords. A lot of sites may have the three keywords: sms text reference but fewer will have the exact phrase: “sms text reference” Adding other keywords to that phrase narrows it even further: “sms text reference” libraries users
And…my biggest secretI just read the instructions. You can read them too. Lookfor: “Help” “Advanced Search” “About” blogs, usergroups, supportforums
IPL Refadmin Ethics (What’s your call on these issues?)Here are some examples of real questions to the IPL that pose ethical issues: 1. a 5th grader who wants to know how to "clean the internet access record" 2. a man in China who wants help in getting around government-imposed Internet access restrictions 3. a teenager who wants referrals to Internet pay-per- access providers which can be paid in advance by check so that parents wont know 4. someone who wants to know how to download illegal software ("warez" and "crackz")Do you think these questions should have been answered, or turned away? How would you handle these questions?
Next Week: Indexes & Databases• Question Set – will be available on Friday 9/14 (each question to be answered with web, index/databases, and book/bibliographic sources) Due on Mon, October 8, 2012• Don’t rush into submitting it – we will cover index/database sources and book/bibliographic sources for the next two weeks, and you will be expected to use sources & techniques we learn in those classes.• Research Guide topic – e-mail brief description of your Research Guide topic, due Mon, Sept 17