smarter internet searching boolean operators. what are boolean operators? fthe terms “and, or,...
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Smarter Internet Searching
Smarter Internet Searching
Boolean Operators Boolean Operators
What are Boolean operators?
What are Boolean operators?
The terms “AND, OR, & NOT” when used in Internet searches are called Boolean operators
The terms “AND, OR, & NOT” when used in Internet searches are called Boolean operators
Why do we call them “Boolean?”
Why do we call them “Boolean?”
George Boole was an English mathematician who lived from 1815-1864
He invented a branch of mathematics called Boolean algebra
His theories formed the basis for using Boolean operators in Internet searches
George Boole was an English mathematician who lived from 1815-1864
He invented a branch of mathematics called Boolean algebra
His theories formed the basis for using Boolean operators in Internet searches
How do you use Boolean operators?
How do you use Boolean operators?
Using AND:Using AND narrows a search by
combining terms; it will bring back documents that use both the search terms you put in,
for example: Portland AND Oregon
Using AND:Using AND narrows a search by
combining terms; it will bring back documents that use both the search terms you put in,
for example: Portland AND Oregon
Using OR
Using OR broadens a search to include results that contain either of the words you type in. OR is a good tool to use when there are several common spellings or synonyms of a word, for example
Theatre OR theater
Using OR
Using OR broadens a search to include results that contain either of the words you type in. OR is a good tool to use when there are several common spellings or synonyms of a word, for example
Theatre OR theater
Using NOT Using Not will narrow a search by
keeping out certain search terms. NOT brings back documents that contain one, but not the other,of the search terms you enter, for example:
Jazz NOT Music
Using NOT Using Not will narrow a search by
keeping out certain search terms. NOT brings back documents that contain one, but not the other,of the search terms you enter, for example:
Jazz NOT Music
Here’s another way to think about it:
Here’s another way to think about it:
Search results are shown in green
Using Or
Using NOT Using NOT
Diagrams from http://tlt.its.psu.edu/suggestions/databases/search/booleansearch.html
Mini Quiz Mini Quiz
Which will get you the MOST results:
A. ANDB. ORC. NOT
Which will get you the MOST results:
A. ANDB. ORC. NOT
Answer: B. OR
We’re going to play a little game to practice
some more.
We’re going to play a little game to practice
some more. 1. Red shirts 1. Red shirts
2. Red shirts AND White shirts
What happened when we added the AND?
3. Blue Shirts 3. Blue Shirts
4. Blue shirts OR white shirts
What happened when we added the OR?
5. Red Shirts5. Red Shirts
6. Red Shirts NOT wearing a sweatshirt
What happened when we added the NOT?
Shortcuts Shortcuts
Not all search engines use Boolean operators in the same way
You can use shortcuts in Google:
“ “ + for AND - for NOT
Not all search engines use Boolean operators in the same way
You can use shortcuts in Google:
“ “ + for AND - for NOT
Let’s practice some more together
:
Let’s practice some more together
:
Now you’re going to try it on your own! Try the SCS search to find
out about SCS history. Try it four times, each time using one of the Google tricks to narrow things down. Use smithtown
christian school, then smithtown christian school and history, smithtown christian school or history then smithtown christian
school not history. Note how many hits you get each time. Send me an e-mail through new.schoolnotes.com explaining
what you did each time, and how it narrowed or broadened the results. E-mail your results to
[email protected] PPT adapted: by Miss Gleason 4/18/11 from unknown source
Now you’re going to try it on your own! Try the SCS search to find
out about SCS history. Try it four times, each time using one of the Google tricks to narrow things down. Use smithtown
christian school, then smithtown christian school and history, smithtown christian school or history then smithtown christian
school not history. Note how many hits you get each time. Send me an e-mail through new.schoolnotes.com explaining
what you did each time, and how it narrowed or broadened the results. E-mail your results to
[email protected] PPT adapted: by Miss Gleason 4/18/11 from unknown source