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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
Collins Dictionary of Sociology, 3rd ed. © HarperCollins Publishers 2000
References in periodicals archive ?
At six months, blood glycated haemoglobin (HbA1c) was significantly lower in the intervention group compared to control group (6.7 per cent versus 7.2 per cent).
Mean pulse rate of patients in the study group (Cases) was 86.07 [+ or -] 13.08 per minute while as those of the control group was 76.67 [+ or -] 11.90 per minute.
In the experimental study of Shang et al.23, the mean flatulation time for the women in the gum chewing group was 5.3 hours earlier than in the control group. This study achieved similar results.
In Figure 2, although some images of the surrounding bone were hidden in the shadow of the Ti pin, the greatest severity of osteolysis was observed around the pin in the control group.
The mean age of the patient in control group was 50 years and study group was 48 years.
The mean duration of first rescue analgesic requirement was 5.1 hours in the intervention group and 6.8 hours in the control group (p=0.332).
The values of decorin in the aqueous humor and in the blood were significantly higher in the PEX group than in the control group (Figure 1).
1), the arithmetic mean has a value of 1.23 m in the initial assessment and of 1.35 m in the final assessment, and therefore an increase of 12 cm for the experimental group and of 1.21m in the initial assessment and of 1.28 m in the final assessment, and therefore, an increase of 7 cm in the control group. The maximum value recorded 1.36m in the initial assessment and 1.49 m in the final assessment and therefore, an increase of 13 cm for the experimental group and 1.31 m in the initial assessment, 1.40 m in the final assessment and therefore an increase of 9 cm in the control group.
Twenty-four ICR mice were randomly assigned to normal control group ( n = 6), blank control group ( n = 6), VEGF treatment group ( n = 6), and NGF treatment group ( n = 6) according to random number table.
In the presented study, mean body temperatures ([degrees]C) were determined, as statistically significant (P < 0.0001), the lowest in the control group (C) and the highest in enteritis group (E).
However, in Control Group I there was a highly significant decrease in student GPAs between their fall freshman semester and their final cumulative GPAs (p < 0.0001).

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