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'Affect' or 'Effect'? What Is the Difference? | Mastering Grammar

(Last Updated: 17 October 2024)

'Affect' or 'Effect'?

One of the 'rules' that you may have learnt in your English class is that affect is a verb and effect is a noun. However, is this always true?

Affect or Effect: What Is the Difference?

It is true that, in most cases, affect is a verb and effect is a noun. Affect means 'have an effect on', so if you affect something, you have an effect on it:

✅ The scandal adversely affected Frederic's career in the police force.
✅ The scandal had an adverse effect on Frederic's career in the police force.

✅ The loss of her parents affected her profoundly.
✅ The loss of her parents had a profound effect on her.

✅ The typhoon affected their business.
✅ The typhoon had an effect on their business.

However, affect is not always a verb, nor is effect always a noun. Effect can also be used as a verb to mean 'bring about a result' or 'make something happen', though this is fairly rare and formal:

✅ This new drug may effect a cure for diabetes.

✅ Radical steps have been taken to effect real political change.

There is a rare noun affect (pronounced /ˈæfekt/), primarily used in psychology and psychiatry, which refers to the outward expression of someone's internal emotions:

✅ Seeing his complete lack of emotional expression, the psychologist described his affect as flat.

✅ Anna is able to show emotions through her affect most of the time.

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Examples from the Media

Economists have warned that social-distancing measures could affect Hong Kong's growth levels. â€”South China Morning Post (2022)

Some analysts say the worst is yet to come for a sputtering US economy, predicting a ripple effect as jobs are cut back. â€”The Age (2003)

If countries with the greatest capacity to effect change do not, those with more modest means should not be expected to do so. â€”The Guardian (2021)

It [schizophrenia] is a severe mental illness affecting how a person thinks, feels and acts. In addition to delusions and hallucinations, symptoms can be as varied as a flat affect and lack of focus and motivation, disorganized thinking and speech, difficulty making decisions and expressing and managing emotions, and memory loss and other cognitive impairments. â€”The Washington Post (2020)

Practice

Choose the correct word to complete each sentence.

1. What will be the affect/effect of closing the library?

2. The sudden closure of the supermarket has affected/effected thousands of shoppers. 

3. They hope to affect/effect a change in the political system.

4. The soft, gentle melody has a calming affect/effect.

5. The new policy will not affect/effect us at all.

6. Someone's affect/effect does not always match the situation that they are in. For example, they may show no emotion at all during a tragedy.

Answer Key

1. effect    2. affected    3. effect    4. effect    5. affect    6. affect

Real-World Examples of Misuse

(Source: Oxford Advanced HKDSE Practice Papers, 2013 Edition)

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