The phrase "a group of studies" is correct and usable in written English.
You can use it when referring to multiple research studies that are related or focused on a similar topic.
Example: "A group of studies has shown that regular exercise can significantly improve mental health."
Alternatives: "a collection of studies" or "a series of studies".
Analyzing a group of studies in the 1940's, the seminal disgust-psychologist Andras Angyal noted that, with the exception of a few slimy things, "no plant product was reported as disgusting".
In August, the Open Science Collaboration reported that it had reattempted a group of studies from the fields of cognitive and social psychology and failed to reproduce the results of nearly two-thirds of them.
On average about half the volunteers taking part in a group of studies specifically designed to detect withdrawal problems suffered symptoms which suggest they had become physically dependent on the drug.
Mr. Oynes acknowledged that he had known nothing about a group of studies, some nearly a decade old, that cast doubt on the reliability of blowout preventers — the fail-safe equipment that failed in the BP spill.
But in a group of studies published in the latest issue of Obstetrics & Gynecology, researchers argue that confining pregnant women to bed for long periods is not a practice based on good evidence – and it may potentially be harmful.
The Congressional Research Service recently synthesized a group of studies that estimated that the "sequestration" of federal funds would lead to the elimination of direct, indirect and "induced" jobs of 907,000 because of military spending cuts; 34,000 from cuts to the National Institutes of Health budget; 80,500 from cuts to education spending; and 500,000 from cuts to Medicare.
At issue was a group of study participants that had been inappropriately counted in the results.
All medical record data were collected by a group of study nurses who had been oriented to the chart auditing manual and protocols by the study Community Project Manager.
A group of 18 studies, drafts and notes relative to the development of garden cities.
A group of figure studies by Joyce Bressler, Mary Brodersen, Quan Doung, Marjorie Freedman and others reminds viewers that sketching live models is at the heart of academic art training.
To synthesize results from a group of diverse studies, the estimations were normalized relative to the amount of added C at a standardized time point.
