Truncation allows you to search different forms of the same word at the same time.
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Truncation is also known as stemming.
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Use the root, or stem, of a word and add an asterisk (*) as a substitute for the word's ending.
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Psycho*
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psychology
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psychological
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psychologist
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psychosis
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psychoanalyst
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Truncation can save time and increase your search to include related words.
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Now let's take a look at these tools in action.
Adapted from University of California Libraries Begin Research Tutorial