control group


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Wikipedia.
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 ?
10) In our study, 20% (10/50) had spontaneous preterm delivery which is three-fold as compared to Control group 06% (03/50) (As shown in Table 1).
The included patients were divided randomly into observation group and control group.
28 m in the final assessment, and therefore, an increase of 7 cm in the control group.
The progression rates from the freshman to the sophomore year for URP students were significantly higher compared to those for students in Control Group I (p < 0.
Similarly, both Physician and Subject Global Aesthetic Improvement Scale (PGAIS/SGAIS) scores diverged during a 6-month evaluator-blinded phase of the study, then converged after crossover by the control group subjects.
1 in the control group, both of which were significant improvements.
After the mindfulness training, that number was significantly lower in the test group: 15 percent versus 27 percent in the control group.
Similarly, the proportion of bypass patients who developed index diabetes during follow-up was markedly lower in the bypass group (2%) than in either control group (17% and 15%, respectively).
At 24 months, women in the intervention group had a lower STI rate than those in the control group (6% vs.
The rate of atypical squamous cells of undetermined significance (ASCUS) with HPV-16/18 was 57% lower in the vaccine group compared with the control group during 3 years of follow-up, said Dr.
The astaxanthin group showed a significant increase in swimming time to exhaustion as compared to the control group.
The volunteers were randomly assigned to one of three training groups or to a control group that received no training.