The phrase "a study measured" is correct and usable in written English.
It can be used when referring to a research study that quantifies or assesses a particular variable or outcome.
Example: "In the research paper, a study measured the impact of sleep on cognitive performance."
Alternatives: "a study assessed" or "a study evaluated".
She said that even if a study measured serotonin in the blood, that wouldn't necessarily reflect what's going on in the brain, behind the blood brain barrier.
If a study measured outcomes across several time points, the first time point after completion of the intervention was selected for comparison of studies.
So, for instance, people with a fasting plasma glucose of 126 mg/dL or greater (that is, diabetes mellitus) may have inadvertently been included if only non-fasting glucose was measured; on the other hand, people with a non-fasting glucose of 200 mg/dL or greater (that is, diabetes mellitus) might have been included if a study measured only fasting glucose.
The test-retest experiment is most naturally relevant for evaluating a tracers' utility for use in a study involving multiple measurements on the same subject, e.g., an occupancy study or a study measuring the effect of some intervention.
A study measuring the frictional forces at play when a person steps on a banana skin.
Now Endocrinology, a peer-reviewed journal, has published a study measuring the impact of low doses of BPA.
Synchronized swimming for sea monkeys ($307,500): Three federal agencies supported a study measuring the swirl created by the collective movements of sea monkeys, a tiny variety of brine shrimp.
To defend its conditioner ad, Dove supplied a study measuring the combing force required by treated hair, a study on breakage in a 200-strokes-per-tresses test, and had an expert defend its decision to use the "wet combing" method rather than "dry combing".
Now researchers at Wake Forest have published a study measuring the physical effects of meditation on pain -- and it turns out it might be more effective than morphine.
Twyeafur and Hafiz (2012) conducted a study measuring beneficiaries' attitudes towards the microcredit program among beneficiaries for more than three years.
A study measuring the quality of life of people using telecare, reported in the British Medical Journal, finds that the technology had no measurable effect on feelings of well being.
