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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
a test of whether
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a test of whether" is correct and usable in written English.
You can use the phrase when discussing the evaluation of an outcome or the confirmation of a hypothesis, for example: "The experiment was a test of whether humans can indeed influence the weather with their thoughts."
✓ Grammatically correct
News & Media
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
59 human-written examples
Actually it is a test of whether predictions are possible in California politics.
News & Media
presented a test of whether the extra reduction would apply to United Nations agencies.
News & Media
"The Line" is a test of whether viewers will come back for a serialized story.
News & Media
But the Kang Nam 1 is a test of whether United Nations sanctions have some teeth.
News & Media
It is a test of whether football exists there in any meaningful sense.
News & Media
That's a test of whether Republicans can hold a minority district.
News & Media
But the country is a test of whether the EU can keep the Balkans from exploding.
News & Media
It will be a test of whether the government puts political reflexes ahead of economic principles.
News & Media
The trade pact will be a test of whether that hope can be fulfilled.
News & Media
What actually results is the replacement of Bolam – a test of whether the treatment was carried out responsibly – with a completely different one, a test of whether procedures were followed when deciding to treat.
News & Media
Some describe the election as a test of whether Republican moderates can succeed in California politics, as well as a test of whether President Bush made the right choice in deciding to promote Mr. Riordan's candidacy.
News & Media
Expert writing Tips
Best practice
Use "a test of whether" when you want to emphasize the evaluative nature of a situation or experiment. It is appropriate when determining the presence or absence of a specific condition or outcome.
Common error
Avoid using "a test of whether or not" unless absolutely necessary for clarity. The "or not" is often implied and omitting it makes the sentence more concise.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a test of whether" functions as a noun phrase introducing a condition or proposition to be evaluated. It indicates that a process, experiment, or situation serves to determine the truth or validity of something. According to Ludwig, it is grammatically correct and widely usable.
Frequent in
News & Media
75%
Science
15%
Formal & Business
5%
Less common in
Encyclopedias
1%
Wiki
1%
Social Media
3%
Ludwig's WRAP-UP
In summary, the phrase "a test of whether" is a grammatically correct and frequently used expression that introduces a situation or experiment designed to determine a specific outcome. It is most commonly found in news and media, science, and formal business contexts. As confirmed by Ludwig, this phrase is best used to frame questions or hypotheses needing evaluation, and writers should be mindful to avoid redundancy by omitting "or not" unless necessary for clarity. Several alternatives exist, such as "an evaluation to see if" or "a determination regarding if", offering nuanced ways to express similar concepts.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
an evaluation to see if
Replaces "test" with "evaluation" focusing on the assessment aspect; uses "to see if" instead of "whether".
a determination regarding if
Substitutes "test" with "determination", emphasizing the act of deciding something; replaces "whether" with "if".
an assessment of if
Uses "assessment" instead of "test", focusing on the evaluation process; uses "if" in place of "whether".
a gauge of if
Replaces "test" with "gauge", highlighting a measurement; uses "if" instead of "whether".
a way of checking if
Focuses on the method of verification using "checking" instead of "test"; uses "if" instead of "whether".
a means of verifying if
Replaces "test" with "means of verifying", stressing confirmation; uses "if" in place of "whether".
a trial to determine if
Substitutes "test" with "trial", highlighting an experiment; uses "to determine if" instead of "whether".
an experiment to see if
Focuses on a controlled study using "experiment" instead of "test"; uses "to see if" instead of "whether".
a check to ascertain if
Replaces "test" with "check", focusing on verification; uses "to ascertain if" instead of "whether".
an inquiry into if
Uses "inquiry" instead of "test", highlighting an investigation; uses "if" instead of "whether".
FAQs
How can I use "a test of whether" in a sentence?
Use "a test of whether" to introduce a scenario or experiment designed to determine if something is true or will happen. For example, "The study was "a test of whether" the new drug could reduce blood pressure".
What are some alternatives to "a test of whether"?
You can use phrases like "an evaluation to see if", "a determination regarding if", or "an assessment of if" as alternatives to ""a test of whether"", depending on the specific nuance you want to convey.
Is it grammatically correct to say "a test of whether or not"?
While grammatically correct, including "or not" after "whether" is often redundant. In most cases, ""a test of whether"" already implies both possibilities, so omitting "or not" makes your sentence more concise.
What is the difference between "a test of whether" and "a test that"?
"A test of whether" introduces a condition or outcome to be determined, whereas "a test that" describes a characteristic of the test itself. For example, "This is "a test of whether" the patient has the disease" versus "This is a test that requires fasting".
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested