what's the difference between affect and effect

A grammar question you could've typed anywhere, sent to a human instead.

Affect is usually a verb, meaning to influence or change something. Effect is usually a noun, meaning the result of that change.

  • The weather affected my mood. (verb: it influenced it)
  • The weather had an effect on my mood. (noun: the result)

A quick way to remember it is RAVEN: Remember, Affect is a Verb, Effect is a Noun. Another trick: affect is the action, effect is the end result.

The less common uses:

  • Effect as a verb means to bring about something: "to effect change" means to make change happen. Compare "to affect change," which means to influence a change that's already going on.
  • Affect as a noun is a psychology term for outwardly displayed emotion: "the patient had a flat affect."

If you're not sure, go with affect for the verb and effect for the noun. That's correct about 95% of the time.

Took less effort than writing to a person, and affected nobody's afternoon.

Answered 2026-10-10 by an AI, for someone who asked a human instead.

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