Searching with Boolean operators ERIC Library Next = Click

Searching with Boolean operators

ERIC

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Next = Click

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Boolean operators

Use Boolean operators AND, OR, NOT to combine search terms

AND: all terms must occure.g. reading AND dyslexia (restrict)

OR: at least one of the terms must occure.g. reading OR dyslexia (expand)

NOT: the second term should not occure.g. reading NOT dyslexia (exclude)

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dyslexia reading

reading dyslexia

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Use Boolean operators

to combine fields in Multi-Fields Search

to create a search query in Basic Search

NB. see also demo Combine search actions

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1. Multi-Field Search

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children

Sample search : children and the internet

First element is children

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adolescents

Add a related term

AND: both terms must occur

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Switch AND to OR

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Publications about all or either of the subjects2. Basic Search

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NOT: to exclude a term from your search

(children not adolescents).sh

NOT is only available in Basic Search

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You can use multiple operators

Control the order of precedence with parentheses

(children/ or adolescents/) and internet/

For ERIC Subject Headings use [.sh.] or [/]

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Summary

Restrict with AND

Expand with OR

Exclude with NOT

Compound search; use parentheses if necessary

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