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
correlate each other
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "correlate each other" is not correct in standard English usage.
It is typically used in contexts discussing relationships or connections between two or more variables or entities, but the phrase itself is redundant. Example: "The study aims to determine how the two variables correlate with each other."
⚠ May contain grammatical issues
Science
Alternative expressions(20)
correspond with each other
align with one another
battle each other
matched each other
associate each other
are interrelated
clash each other
are linked
are related
have an association
are connected
agree with each other
compete each other
influence one another
game each other
are interconnected
reflect each other
play each other
relate to each other
match each other
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
3 human-written examples
These changes are inter-related, since reduction of sympathetic overactivity, improvement of endothelial dysfunction, and decrease of insulin resistance correlate each other, and with decreases of body weight and of visceral fat [ 18].
Science
However, it is difficult to correlate each other due to the difference in treatment and the dose of drug given in the intravenous route.
Science
MMP expression and activity do not always correlate each other.
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
In this test case, two wind farms are correlated each other.
These bis(diphenylamine)s showed two reversible one-electron redox couples by cyclic voltammetry, indicating that the two diphenylamine moieties are correlated each other through spiro-conjugation.
Science
The relevant predictors were chosen to be correlated each other.
It suggests that better performances are achievable as stronger the predictors are correlated each other.
These parameters are correlated each other and therefore non-identifiable [ 14, 15].
Science
Those relevant predictors were set a priori, with the requirement that they were correlated each other.
It was assumed that relevant predictors were few and correlated each other.
However, it was shown that ROC performance decreases drastically in case relevant predictors were not correlated each other.
Expert writing Tips
Best practice
Instead of using the phrase "correlate each other", opt for more standard expressions like "are correlated" or "relate to each other" for clearer and more grammatically sound writing.
Common error
Avoid using "each other" after "correlate" because correlation inherently implies a mutual relationship. Just state that the items "are correlated" without adding the redundant "each other".
Source & Trust
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "correlate each other" functions as a verbal phrase aiming to describe a mutual relationship between two or more entities. However, Ludwig AI indicates this construction is grammatically incorrect, as the verb "correlate" inherently implies a reciprocal action.
Frequent in
Science
100%
Less common in
News & Media
0%
Formal & Business
0%
Academia
0%
Ludwig's WRAP-UP
In summary, while the phrase "correlate each other" appears in some scientific texts, it is generally considered grammatically incorrect because the verb "correlate" already implies a mutual relationship. Ludwig AI confirms this assessment. It is recommended to use alternatives like "are correlated" or "relate to each other" for clearer and more accurate writing. This ensures that the intended message of statistical dependency is conveyed effectively and professionally, aligning with standard English usage.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
relate to each other
A general way to state that there is a relationship between two or more things.
are interrelated
Focuses on the mutual relationship between elements, dropping the explicit correlation.
are interconnected
Emphasizes the complex connections between the elements.
are associated with one another
Emphasizes the connection or link between items, rather than statistical correlation.
have an association
Similar to "are associated", but avoids the use of "one another".
have a mutual relationship
Highlights the reciprocity of the connection, avoiding statistical terms.
are linked
A shorter version to simply mean that relationship exists between elements.
are mutually dependent
Stresses the reliance each element has on the other, moving away from simple correlation.
influence one another
Highlights the impact that entities have on each other, rather than a mere statistical relationship.
are connected
A simple way to indicate a relationship without specifying the type of connection.
FAQs
Is it grammatically correct to say "correlate each other"?
No, the phrase "correlate each other" is generally considered grammatically incorrect. It's more appropriate to say that things "are correlated" or "relate to each other".
What does it mean when variables are described as "correlated"?
When variables are described as correlated, it means they have a statistical relationship. As one variable changes, there's a predictable shift in the other variable, which can be either positive or negative.
How can I use "correlate" correctly in a sentence?
Use "correlate" by stating that variables "are correlated" or "relate to each other". For instance, "Height and weight are correlated" is a correct usage.
What's the difference between saying "are correlated" and "correlate each other"?
Saying "are correlated" is the standard, grammatically sound way to express a mutual relationship. "Correlate each other" is redundant because the act of correlating already implies a relationship between multiple entities.
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
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested