control group


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Related to control group: independent variable

control group

[kən′trōl ‚grüp]
(statistics)
A sample in which a factor whose effect is being estimated is absent or is held constant, in order to provide a comparison.

control group

or

control condition

a group matched with the EXPERIMENTAL GROUP in all aspects except that it is not treated with the INDEPENDENT VARIABLE whose effect is to be studied. A control group is an essential part of EXPERIMENTAL METHOD design, since, unless a comparison is made between two groups, one having been subject to the variable and one not, it is difficult to conclude that any change is due to that variable. See also CONTROL, STATISTICAL.
References in periodicals archive ?
This preliminary analysis indicated that there was no statistically significant difference between the treatment and control groups in the primary endpoint of the Trial, the incidence of complete healing at 20 weeks.
This is a welcome perspective to Control Group as it moves to bring more interactive and engaging experiences to the retail space.
Those participating in the treadmill exercise group had more favourable changes in brachial arterial flow-mediated dilation than the control group, whereas changes among participants in the resistance-training group were not different from the control group.
What's more, the Mediterranean group improved more than the control group on all measures of the metabolic syndrome--large waist size, low HDL ("good") cholesterol, and higher-than-optimal blood sugar, blood pressure, and triglycerides.
There were no significant differences between the demographic characteristics of women in the emergency contraceptive group and those of women in the control group.
He says that doing fewer stent replacements and treating patients with anticlotting drugs for 8 weeks after radiation can bring the risk of clot formation down to that of the control group.
We will again use a control group and monitor progress of both classes to determine if the integrated library assignments enhance the students' final project and learning experience.
The pilot pressure ulcer trial consisted of 50 patients segregated into three dosing groups and one control group.
Less than half the people in the control group (who were not put on the program) showed any improvement.
NEW YORK -- Control Group today announced it has become an Autodesk Authorized Value Added Reseller (VAR).
A study was selected for inclusion if it featured the use of a basic, scientific, or graphing calculator; it involved students in a mainstream K-16 classroom; and it was a quasi-experimental research project with treatment group data being compared to control group data.
One group submitted fecal samples from three consecutive stools once a year, another group did so every other year, and the third control group submitted none.