| The American Heritage® Book of English Usage. |
A Practical and Authoritative Guide to Contemporary English. 1996.
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3. Word Choice: New Uses, Common Confusion, and Constraints
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| § 15. affect / effect |
| Affect and effect are sometimes confused, but before you can sort them out, you must sort out the two words spelled affect. One means “to put on a false show of,” as in She affected a British accent. The other can be both a noun and a verb. The noun meaning “emotion” is a technical term from psychology that sometimes shows up in general writing, as in this quote from a Norman Mailer piece about the Gulf War: “Of course, the soldiers seen on television had been carefully chosen for blandness of affect.” In its far more common role as a verb, affect usually means “to influence,” as in The Surgeon General’s report outlined how smoking affects health. | 1 |
| Effect can also serve as a noun or a verb. The noun means “a result.” Thus if you affect something, you are likely to see an effect of some kind, and from this may arise some of the confusion. As a verb, effect means “to bring about or execute.” Thus, using effect in the sentence The measures have been designed to effect savings implies that the measures will cause new savings to come about. But using affect in the very similar sentence These measures may affect savings could just as easily imply that the measures may reduce savings that have already been realized. | 2 |
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| The American Heritage® Book of English Usage. Copyright © 1996 by Houghton Mifflin Company. All rights reserved. |
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