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Smarter Internet Searching Boolean Operators

Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

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Page 1: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

Smarter Internet Searching

Smarter Internet Searching

Boolean Operators Boolean Operators

Page 2: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

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

Page 3: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

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

Page 4: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

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

Page 5: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

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

Page 6: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

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

Page 7: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

Here’s another way to think about it:

Here’s another way to think about it:

Search results are shown in green

Page 8: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

Using Or

Page 9: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

Using NOT Using NOT

Diagrams from http://tlt.its.psu.edu/suggestions/databases/search/booleansearch.html

Page 10: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

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

Page 11: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

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?

Page 12: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

3. Blue Shirts 3. Blue Shirts

4. Blue shirts OR white shirts

What happened when we added the OR?

Page 13: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

5. Red Shirts5. Red Shirts

6. Red Shirts NOT wearing a sweatshirt

What happened when we added the NOT?

Page 14: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

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

Page 15: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

Let’s practice some more together

:

Let’s practice some more together

:

Page 16: Smarter Internet Searching Boolean Operators. What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches are called Boolean

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