(in an experiment or clinical trial) a group of subjects closely resembling the treatment group in many demographic variables but not receiving the active medication or factor under study and thereby serving as a comparison group when treatment results are evaluated.
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How to use control group in a sentence
The group with cold toes and high levels of recreational cold exposure had roughly the same ability to detect temperature changes as the control group, and their blood vessels dilated to a similar degree.
Once again, the control group has plenty of people with seemingly better endurance genes than the endurance Olympians.
In the original study, the plyometric group improved their running economy by an average of seven percent, the dynamic weight training group improved by four percent, and a control group that didn’t do either saw no change in their running economy.
In a control group where both mice partners experienced inflammation, the animals’ sensitivity didn’t change after their time together.Mice may ‘catch’ each other’s pain — and pain relief | Carolyn Wilke | January 12, 2021 | Science News
That said, most of the studies exploring this connection don’t include a control group, or a baseline for comparison.Can CBD help you chill? Here’s what we know so far. | Purbita Saha | January 4, 2021 | Popular-Science
A control group—a population of gorillas unaffected by Ebola, separated by a river and 20 kilometers—was also observed.
The control group proved able to respond two to two and a half times faster than usual and with poor aim.Why Tourette’s May Be Tim Howard’s Secret Weapon on the Field | Michael Daly | July 3, 2014 | THE DAILY BEAST
The researchers examined stories in 469 local papers following suicides in both the clustered and the control group.
In the Oregon study, 5.1 percent of the people in the control group had elevated GH levels.No, Really, It's Possible That Health Insurance May Not Make Us Healthier | Megan McArdle | May 7, 2013 | THE DAILY BEAST
For one thing, you'd probably have trouble getting people to stay in the control group once you put them there.Study: Giving People Government Health Insurance May Not Make them Any Healthier | Megan McArdle | May 1, 2013 | THE DAILY BEAST
There is no control group, and consequently, no way of knowing whether the improvement was due to the removal of the defect.
As a control group, there were chosen 45 boys who had had no operation, and who lived and worked under the same conditions.
The average of the boys in the control group was 7421 and for the first group after operation 7406.
All members of this group were examined,—to the number of fifty-six, and from them the control group was finally selected.
The average improvement of the test group in excess of the control group is, then, 183 per cent.
British Dictionary definitions for control group
any group used as a control in a statistical experiment, esp a group of patients who receive either a placebo or a standard drug during an investigation of the effects of another drug on other patients
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012