Effect vs. Affect
The Basic Rule
- Affect is usually a verb (action)
- Effect is usually a noun (thing)
Affect - The Verb
“Affect” means to influence or have an impact on.
Examples
- The weather affects my mood. (influences)
- How will this affect the results? (influence)
- The news affected everyone. (had an impact on)
- Lack of sleep affects your health. (influences)
Memory Trick
Affect = Action (verb)
Effect - The Noun
“Effect” means a result or consequence.
Examples
- What are the effects of this drug? (results)
- The effect was immediate. (result)
- Climate change has many effects. (consequences)
- The new law had little effect. (impact/result)
Memory Trick
Effect = End result (noun)
The RAVEN Trick
Remember: Affect = Verb Effect = Noun
Common Phrases
With Affect (verb)
- affect someone’s decision
- affect the outcome
- affected by the news
- affected areas
With Effect (noun)
- have an effect on
- side effects
- cause and effect
- special effects
- take effect (become active)
- in effect (essentially)
The Exceptions
Effect as a Verb (rare)
Meaning: to bring about or cause
- The new manager effected changes. (brought about changes)
- They hoped to effect a solution. (create/cause)
Affect as a Noun (psychology)
Meaning: emotional expression
- The patient showed flat affect. (emotional expression)
These are rare in everyday use.
Quick Decision Guide
- Can you replace with “influence”? → Use affect
- Can you replace with “result”? → Use effect
- Is there “a/an/the” before it? → Probably effect (noun)
- Is it showing action? → Probably affect (verb)
Practice Sentences
| Sentence | Answer |
|---|---|
| How will this ___ me? | affect (influence me) |
| The ___ was amazing. | effect (the result was) |
| It didn’t ___ the outcome. | affect (influence) |
| What are the side ___? | effects (results) |
Affect is almost always a verb (“The rain affected our plans.”); effect is almost always a noun (“The effect was immediate.”). The rare exceptions — to effect change, an affect in psychology — are advanced usage.