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
external stimuli
Grammar usage guide and real-world examplesUSAGE SUMMARY
'external stimuli' is correct and can be used in written English.
It can be used to refer to the stimuli outside the body that affects a person's behavior or emotions. For example, "The children's reactions to external stimuli could be seen in their artwork."
✓ Grammatically correct
News & Media
Academia
Science
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
60 human-written examples
External stimuli are reduced to a minimum.
News & Media
How they evolve based on internal and external stimuli.
Academia
"However, recently I'm discovering how to apply the state of mind without needing the external stimuli.
News & Media
Television doesn't need external stimuli anymore, it has become self-generating, like an amoeba.
News & Media
for signals that they use to detect other external stimuli.
Encyclopedias
Thus, we explored whether the tumor itself may be the source of these external stimuli.
Science & Research
Thought, or thinking, is considered to mediate between inner activity and external stimuli.
Encyclopedias
Precise control of complex cellular functions with external stimuli is essential for engineering effective cell therapeutics.
Science & Research
Unsurprisingly, OPCs must integrate a plethora of external stimuli to determine when to differentiate.
Science & Research
They require no external stimuli, no subject matter and no obvious end point.
News & Media
It reacts to touch, smell, and sound, and shows facial expressions responding to external stimuli.
Science & Research
Expert writing Tips
Best practice
When discussing psychological or physiological responses, use "external stimuli" to emphasize the environmental factors that prompt those reactions. This phrase is particularly useful in scientific or academic contexts.
Common error
Avoid using "external stimuli" in casual conversation or informal writing. Simpler terms like "outside influences" or "environmental factors" are often more appropriate and less likely to sound pretentious.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "external stimuli" functions primarily as a noun phrase, identifying environmental factors that elicit a response. As noted by Ludwig AI, this phrase is used to describe the stimuli outside the body that affects a person's behavior or emotions.
Frequent in
Science
36%
News & Media
33%
Academia
19%
Less common in
Encyclopedias
3%
Formal & Business
0%
Wiki
1%
Ludwig's WRAP-UP
In summary, the phrase "external stimuli" is a grammatically correct and frequently used noun phrase, particularly in scientific, academic, and news contexts. According to Ludwig AI, it refers to stimuli originating outside the body that influences behavior or emotions. While versatile, it is best suited for formal writing and technical discussions, where its precision is valued. When simpler language is desired, alternatives such as "external inputs" or "environmental cues" may be more appropriate. Steer clear of overuse in casual contexts.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
exogenous stimuli
A more technical or scientific synonym for "external stimuli", implying an external cause or origin.
external inputs
Focuses on the idea of things coming from outside that have an effect, similar to "external stimuli".
external triggers
Emphasizes the role of external factors in initiating a response or reaction.
outside influences
Highlights the effect of external factors on something, often behavior or decisions.
exterior factors
A broad term for any influences originating from outside a system or entity.
environmental cues
Specifically refers to signals from the environment that influence behavior or physiology.
sensory inputs
Focuses on the data received through the senses from the external world.
situational determinants
Highlights how the context or situation affects behavior or outcomes.
ambient conditions
Refers to the surrounding environmental factors that can affect a system or organism.
environmental stressors
Specifically refers to external factors that cause stress or strain on a system.
FAQs
How can I use "external stimuli" in a sentence?
"External stimuli" is used to describe factors originating from the environment that cause a response. For example, "The experiment measured the subject's reaction to various external stimuli."
What are some alternatives to "external stimuli"?
Depending on the context, you could use alternatives like "external inputs", "exogenous stimuli", or "environmental cues".
Is "external stimuli" appropriate for formal writing?
Yes, "external stimuli" is suitable for formal writing, especially in scientific or academic contexts where precise language is important. It accurately conveys the concept of external factors influencing a system or organism.
What's the difference between "external stimuli" and "internal stimuli"?
"External stimuli" refers to factors originating from the environment, while "internal stimuli" refers to factors originating within an organism or system. They represent opposing sources of influence on a given process or behavior.
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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested