Definition
A control group is one of multiple groups in an experimental treatment study, used as a baseline for the estimation of the effect of interest in the other groups.
Introduction
Experimental treatment studies are designed to estimate the effect of a particular treatment on one or more variables. Typically, the variables of interest are observed before and after treatment to detect changes that occurred in between. The two observations of the variables are called pretest and posttest to indicate their temporal position before and after the treatment. However, any differences between pre- and posttest need not be caused by the treatment. Therefore, experimental treatment studies use at least two groups: the experimental group receives the treatment while the control group does not. The effect of the treatment can be estimated by comparing the change observed in the treatment group with the change observed in the control group.
Treatment Groups as Independent Variables in an...
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Hilbert, S. (2017). Control Group. In: Zeigler-Hill, V., Shackelford, T. (eds) Encyclopedia of Personality and Individual Differences. Springer, Cham. https://doi.org/10.1007/978-3-319-28099-8_1290-1
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DOI: https://doi.org/10.1007/978-3-319-28099-8_1290-1
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Publisher Name: Springer, Cham
Print ISBN: 978-3-319-28099-8
Online ISBN: 978-3-319-28099-8
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