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Smarter Internet Searching Boolean Operators

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Page 1: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

Smarter Internet Searching

Smarter Internet Searching

Boolean Operators Boolean Operators

Page 2: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

11/14/200911/14/2009 Mrs. RooleyMrs. Rooley

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. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

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. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used 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

Page 5: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

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. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

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. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

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. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

Using Or

Page 9: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

Using NOT Using NOT

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

Page 10: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

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. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

Let’s practice together:

Let’s practice together:

Now let’s try it on the Internet with Google:

Now let’s try it on the Internet with Google:

Page 12: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

Smarter SearchingSmarter Searching

1. List 5 topics you want to know more about.

2. List three key words that could be used to find information about each topic.

EX. Swimmers, Olympic Swimmers, World Record Swimmers, Women Swimmers, etc.

1. List 5 topics you want to know more about.

2. List three key words that could be used to find information about each topic.

EX. Swimmers, Olympic Swimmers, World Record Swimmers, Women Swimmers, etc.

Page 13: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

Using ANDUsing AND

Choose one of your topics, What can you add to your search to get better results?

Try a one word search, then try adding AND and a second word.

Draw a Venn diagram showing your results. Label the circles and give a specific example of one of your search results.

Choose one of your topics, What can you add to your search to get better results?

Try a one word search, then try adding AND and a second word.

Draw a Venn diagram showing your results. Label the circles and give a specific example of one of your search results.

Page 14: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

Using ORUsing OR

Now do the same search using the OR operator between your two keywords.

Describe what happened.Draw a Venn Diagram showing the results.

Now do the same search using the OR operator between your two keywords.

Describe what happened.Draw a Venn Diagram showing the results.

Page 15: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

Using NOTUsing NOT

Search Google for ‘jaguar’, ‘mustang’ or ‘explorer’. What are your results?

Now search these terms adding ‘NOT cars’. What is the difference?

Search Google for ‘jaguar’, ‘mustang’ or ‘explorer’. What are your results?

Now search these terms adding ‘NOT cars’. What is the difference?

Page 16: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

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 17: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

Let’s practice some more together

:

Let’s practice some more together

:

Page 18: Smarter Internet Searching Boolean Operators. 11/14/2009Mrs. Rooley What are Boolean operators? FThe terms “AND, OR, & NOT” when used in Internet searches

Now you’re going to try it on your

own!

Now you’re going to try it on your

own!