Searching with Boolean operators

ERIC

Library

Next = Click

Boolean operators 2

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)

Library

dyslexia reading

reading dyslexia

Boolean operators 3

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

Library

Boolean operators 4

1. Multi-Field Search

Boolean operators 5

children

Sample search : children and the internet

First element is children

Boolean operators 6

adolescents

Add a related term

AND: both terms must occur

Boolean operators 7

Switch AND to OR

Boolean operators 8

Publications about all or either of the subjects2. Basic Search

Boolean operators 9

NOT: to exclude a term from your search

(children not adolescents).sh

NOT is only available in Basic Search

Boolean operators 10

You can use multiple operators

Control the order of precedence with parentheses

(children/ or adolescents/) and internet/

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

Boolean operators 11

Boolean operators 12

Summary

Restrict with AND

Expand with OR

Exclude with NOT

Compound search; use parentheses if necessary

Library