The phrase "does not affect or effect" is often misused because "affect" and "effect" sound similar but have distinct roles in English grammar. "Affect" is a verb meaning to influence, while "effect" is a noun meaning a result or outcome. Using them interchangeably creates errors.
When you say something "does not affect," you mean it doesn't influence or change anything. When you say something "does not effect," you're incorrectly using "effect" as a verb, which is not standard in American English. The correct form is always "does not affect."
For example: "The new policy does not affect employee schedules." This is correct. "The new policy does not effect employee schedules" is incorrect because "effect" cannot function as a verb in this context. You cannot "effect" a schedule change unless you mean to bring it into existence through deliberate action.
"Affect" functions as a verb. It describes an action that changes or influences something else. It's typically used in sentences involving cause and response.
Examples: - "The rain affected the turnout at the outdoor event." - "Sleep deprivation affects concentration." - "This decision will not affect your eligibility."
"Effect" is almost always a noun. It refers to the result or consequence of an action.
Examples: - "The effect of the rain was delayed arrivals." - "The medication had a positive effect on her symptoms." - "The economic effect of inflation is widespread."
Occasionally, "effect" appears as a verb in formal or technical contexts, such as "to effect change" - meaning to bring about or accomplish. But this usage is rare and limited to specific constructions. Even then, it's not interchangeable with "affect" in everyday speech.
Many people mix up "affect" and "effect" because they sound alike and both relate to change. The confusion arises especially in passive constructions or when the subject is unclear.
Incorrect: "The update did not effect any changes." Correct: "The update did not affect any changes." Even better: "The update did not result in any changes."
Another frequent error occurs in headlines or social media posts: "This news will effect your daily routine." Correct: "This news will affect your daily routine."
A useful mnemonic: "Affect" starts with 'A' - think "Action." "Effect" ends with 'T' - think "Thing." The verb involves action; the noun is the result.
Consider this sentence from a corporate email: "The merger did not effect our team's morale." This is incorrect. The intended meaning is that morale wasn't influenced - so "affect" is required.
Correct version: "The merger did not affect our team's morale."
Now consider a scientific report: "The drug's effect on blood pressure was significant." Here, "effect" is correctly used as a noun. The drug caused a measurable change - the effect.
Another example: "The new law will effect immediate improvements." This is wrong. "Effect" as a verb is acceptable only in formal contexts like "effect reforms." Better: "The new law will affect immediate improvements" - though even this is awkward. Best: "The new law will bring about immediate improvements."
Mistaking "affect" for "effect" undermines clarity and credibility. In academic, professional, or legal writing, such errors signal carelessness. According to the Purdue Online Writing Lab (OWL), consistent use of "affect" as a verb and "effect" as a noun is essential for precision.
Similarly, the Associated Press Stylebook emphasizes that "affect" and "effect" are not interchangeable. Misusing them can distort meaning - especially in data-driven fields like medicine, economics, or engineering.
For example: "The side effects were minimal" is correct. "The side affects were minimal" would be nonsensical. "Effects" refer to outcomes; "affects" would imply the side conditions themselves are influencing something, which is illogical.
| Word | Part of Speech | Meaning | Example |
|---|---|---|---|
| affect | Verb | To influence or change | The storm affected travel plans. |
| effect | Noun | The result or outcome | The storm had a major effect on traffic. |
| effect | Verb (rare) | To bring about or accomplish | They sought to effect change in policy. |
I once reviewed a job application where the candidate wrote: "My skills do not effect my performance." That sentence failed to convey intent. I corrected it to "do not affect" during editing. The applicant later thanked me, saying they'd never noticed the mistake despite years of writing emails and reports.
Always use "does not affect" when referring to influence. Never use "effect" as a verb in standard American English. The phrase "does not affect or effect" is invalid because it combines a correct verb with an incorrect one.
If you're unsure, test the sentence with a synonym: "influence" for "affect," "result" for "effect." If the sentence still makes sense, you're likely using the right word.
For example: "The noise did not influence the meeting." → "affect" is correct. "The noise did not result in disruption." → "effect" is correct.
Remember: "This does not affect or effect" is a red flag. Only "affect" belongs in the verb position. "Effect" may appear in the noun role, but never as a substitute for "affect" in standard usage.
Mastering this distinction improves clarity, strengthens writing, and prevents misunderstandings in both personal and professional communication.