Affect vs. Effect: The Definitive Usage Guide
Learn the golden RAVEN rule to never confuse the verb "affect" with the noun "effect".
Rules & Applied Examples
Rule 1: Affect is almost always an Action (Verb)
Use "affect" when you mean to influence or produce a change in something.
“The bad weather will affect our travel schedule.”
“The bad weather will effect our travel schedule.”
Rule 2: Effect is usually the End Result (Noun)
Use "effect" when you refer to the result, consequence, or outcome of an action.
“The medication had an immediate calming effect.”
“The medication had an immediate calming affect.”
Rule 3: Rare Exceptions to Know
"Effect" can be a verb meaning "to bring about/cause" (e.g., to effect change). "Affect" can be a noun in psychology referring to emotional expression.
“The new prime minister hopes to effect meaningful economic reform.”
“The new prime minister hopes to affect meaningful economic reform (when meaning to execute it).”