Deep Web or Invisible Web Google & others search about 15% Internet
Can Google Do it All?
Google and other Internet search engines access only 7% of available health-related information.
Source: Henderson J. Google scholar: A source for clinicians? CMAJ 2005;172(12):1549-1550
Still in BETA, meaning its still in a developmental phase
Does not used controlled vocabulary and does not have up to date access to current journal articles
Let’s Get Googling! Go to Google Canada: www.google.ca
Basic Google Search Screen Choose what to search Enter search terms here Click here when ready to start search Can choose to search only Canadian sites Set your preferences Automatically takes you to the first site in results URL- the website address Get more help with your searching Title of Web Page
http:// - stands for hypertext transfer protocal
www – World Wide Web
saskatoonhealthregion – this is the domain name
.ca – this is the type of domain, this is a Canadian site
URL: Uniform Resource Locater
Setting Your Preferences
Understanding Google Results Database searched Number of results Words searched Cached & Similar Pages Search terms in Bold Results current as of January 29, 2007
Image Search Results current as of January 29, 2007 Click on Images and then click on Search Click on Advanced Image Search for more options
Map Search Click on Maps and then click on Search Maps Shows location of Museum Results current as of January 29, 2007
AND, OR, NOT …. Boolean Operators
AND is exclusive – must have both terms
OR is inclusive- must have either idea
Dogs Dogs Cats Dogs AND Cats Cats Dogs OR Cats
AND, OR, NOT …. Boolean Operators
NOT : is e xclusive, must have first term not the second
Cat Dog Cat Not Dog
AND is the default in Google
Example: dogs AND cats = dogs cats
Phrase put phrase in quotes
Example: “The truth about cats and dogs”
OR can use the word OR and can use symbol (I)
Example: dogs OR cats = dogs I cats
+ forces search of common words
Example: the + truth + about + cats + dogs
Synonyms searched using Tilde (~)
Example: dogs ~ puppies ~ terrier ~ husky
Google Advanced Search AND Phrase OR NOT
Google Advanced Search Pearl Growing: Helpful when you find the perfect site and want more like it Allows you to search within Google Books or only for MAC computer stuff, etc.
1. Choose some search terms
2. Try different combinations
(with all the words, with the exact phrase, with at least one of the words, without the words)
3. Choose some limits
file type (.ppt, .doc)
Language (English, French)
Domain (.edu, .gov, .org, .ca)
4. Ask Us Questions!
Try It! Google Advanced Search
Google Advanced: Sample Search We limit our search to Power Point Presentations
Google Advanced: Sample Search Results current as of January 30, 2007 Our Results are all Power Point Presentations
Other Google Stuff
Quick Tips: Evaluating Web Sites
Who Runs the Site? Check the About Us Page, Do they provide any contact information? (anonymous sites can spell trouble). Do you recognize the organization, institution or agency?
Quality of Information. Check when it was last updated (on bottom of page). Does the information seem credible?
Secure Connection? Is there a lock icon in Security Status bar, located on right side of address bar?
Note the lock icon to show the page is secure
Google is a search engine, does not have access to same information as MEDLINE, CINAHL, etc.
Google supports partial Boolean (OR, NOT and phrase searching)
Easier to use Google Advanced Search Screen
Advanced Search allows you to apply limits
Can search for images, news, scholarly literature, etc.
You Have Learned:
How Search Engines, specifically Google works
How to search in the Basic Google Search Screen
Boolean Logic & how Google uses Boolean
How to search in the Advanced Google Search Screen
How to evaluate websites
Don’t Hesitate to Call or E-mail the SHR Medical Library Staff!