1. According to a study, students who eat breakfast do better in the classroom.

2. According to a research, students who eat breakfast do better in the classroom.
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Are both OK? Does 'study' in #1 mean 'research' in #2? Do we have to put 'a' before 'study' or 'research'?

1. is ok

2. is not

A study is a discrete thing. If there were several studies you would say "according to studies".

However you would not say "a research" because research is an action. It should be; "According to research"...
or according to research projects or according to research results

INSTEAD OF JUST SAYING YES OR NO-

I WILL GIVE YOU MORE INPUT!

"A RESEARCH" doesn't really make sense where there is grammar. It would be different to say a research paper. By only saying "A research" It makes it sound like an incomplete sentence even though you are starting one. So instead, the first one is better because of its proper transition in writing.

A study could be studying something. It could be finding research and putting it into something such as a paper. For example (TRUE INFO) According to a new study, only half of abortions are considered safe. It sounds like it flows better than According to new research, only half of abortions are considered safe. It depends on how you prefer it to sound, but personally saying "A STUDY" sounds more professional than saying "RESEARCH" saying "A RESEARCH" MAKES NO SENSE.

"A STUDY" IS FINE BY ITSELF. LISTEN TO THE EXAMPLES:

"ACCORDING TO STUDY, every 1 in 3000 have a disease called Neurofibromatosis causes tumors to grow on the body."

NOW REPLACE WITH A STUDY, A RESEARCH, AND RESEARCH. JUST LIKE IF YOU SAID RESEARCHES YOU WOULDN'T INCLUDE AN A before RESEARCHES. IT JUST DEPENDS ON GRAMMAR AND PLACEMENT.

THANK YOU, I HOPE THIS HELPS! YOUNG WRITER/ AUTHOR,

LILIANNA HALLS!

EMAIL ME@
liliannahalls @ gmail. com

Both sentences are grammatically correct and the meaning is similar. However, there is a subtle difference in the words used.

In sentence 1, the word "study" is used. This suggests that there was a specific investigation conducted, possibly with a smaller sample size or scope.

In sentence 2, the word "research" is used. This suggests a more comprehensive investigation that may have involved multiple studies or a larger sample size.

To answer your question, "study" in sentence 1 can be considered similar to "research" in sentence 2, though "research" is a broader term that encompasses various studies.

As for the use of the article "a" before "study" or "research," it is common to use "a" before both words to indicate that it is referring to one specific instance of a study or research. However, in certain contexts, it may also be appropriate to use the definite article "the" if referring to a specific study or research that has been mentioned before or is well-known.

So, to summarize, both options are acceptable and the choice between using "study" or "research" and including the article "a" or "the" depends on the specific context and the intended meaning.