Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
large affect
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "large affect" is not correct in standard written English.
The correct term is "large effect," which refers to a significant impact or influence. Example: "The new policy had a large effect on employee productivity, leading to improved performance across the board."
⚠ May contain grammatical issues
Science
News & Media
Alternative expressions(18)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
10 human-written examples
On the other hand, the Wagnerian influence carries over into a large affect, for all the songs' small size.
News & Media
Urbanization may have a large affect on biodiversity patterns by enhancing biological invasions.
Science
Here, a small change in affects extrapolated from tweets can have a large affect on the ratio calculated.
Science
These absorption results show that precursor type has a large affect on the absorption of the thin film.
Science
Ruthenium tetroxide did not appear to have a large affect on fiber morphology; however, selectivity for acetone was much higher when GNFs were treated with ruthenium tetroxide.
Science
"A single day of absence has a noticeable but not large affect on kids' learning.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
50 human-written examples
A large, affecting painting of the dead Jesus surrounded by mourning followers explains why he was in demand for church commissions.
News & Media
These changes can be quite small, affecting only one nucleotide pair, or they can be relatively large, affecting hundreds or thousands of nucleotides.
Encyclopedias
It is also important to note that the windfield of Irene is expected to be large, affecting areas distant from the immediate track of Irene's center.
News & Media
In fact, it impacts on the society at large, affecting school performance, healthcare costs and productivity.
Formal & Business
Haulage speed has the largest affect on the cutting power of the drum.
Expert writing Tips
Best practice
Always use "effect" when referring to a result or consequence. For example, "The policy had a large effect on the company's profits."
Common error
Remember that "affect" is primarily a verb meaning to influence, while "effect" is primarily a noun meaning a result. Using "affect" as a noun is a common mistake to avoid.
Source & Trust
79%
Authority and reliability
1.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "large affect" is grammatically incorrect in standard English. The intended function is typically to describe a significant impact or influence. However, the misuse of "affect" as a noun where "effect" is required renders the phrase non-standard. As Ludwig AI suggests, the correct term is "large effect".
Frequent in
Science
60%
News & Media
30%
Formal & Business
10%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "large affect" is an incorrect usage in standard English. As Ludwig AI highlights, the correct phrase is "large effect", where "effect" is used as a noun to denote a result or impact. While the intended purpose is to communicate a significant influence, the grammatical error undermines the phrase's effectiveness. The usage appears mostly in scientific and news contexts, indicating an attempt at a neutral to formal register, which is then diminished by the incorrect grammar. To avoid this common mistake, remember that "affect" is primarily a verb, while "effect" is primarily a noun. Alternatives such as "significant impact" or "substantial influence" can be used to convey a similar meaning with grammatical accuracy.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
considerable effect
Replaces "affect" with the grammatically correct "effect" while maintaining a similar level of impact.
significant impact
Substitutes the entire phrase with a more common and grammatically sound alternative conveying substantial influence.
substantial influence
Replaces the phrase with a similar expression emphasizing the degree of sway or control.
major effect
Uses "effect" instead of "affect", indicating a notable result or outcome.
large effect
Corrects the grammatical error by using "effect" instead of "affect", preserving the intended meaning.
huge impact
Emphasizes the magnitude of influence or consequence.
enormous influence
Highlights the vast extent of the impact or sway.
tremendous effect
Indicates a very great or intense influence.
considerable influence
Suggests a noteworthy degree of impact or control.
marked impact
Emphasizes the noticeable nature of the influence.
FAQs
What's the correct way to say something had a big impact?
The correct phrase is "large effect", not "large affect". "Effect" is the noun that means result or impact. For example, "The new regulations had a "large effect" on small businesses".
Is "affect" ever used as a noun?
Yes, but it's rare and specific. "Affect" as a noun refers to emotion or feeling, primarily in psychology. It's not interchangeable with "effect" in general usage, for example, "The patient displayed a flat "affect" during the interview".
What can I say instead of "large affect"?
Instead of "large affect", use alternatives like "significant impact", "substantial influence", or "major effect", depending on the intended meaning.
How do I remember the difference between "affect" and "effect"?
A helpful mnemonic is: "affect" is a verb (action), and "effect" is a noun (result). Think: "The change will affect (verb) many people, leading to a noticeable effect (noun)".
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
79%
Authority and reliability
1.8/5
Expert rating
Real-world application tested