YOGYAKARTA In a study, variables are measurable concepts or characteristics. There are several types of variables in the study, one of which is called control variables. What it is control variables can be understood as controllable variables. To understand further the following article.
In a book entitled Conjecture and Variable Research, Ig. Dodiet Aditya Setyawan, SKM., MPH explains that the control variable is a variable controlled or made constant. Thus the relation of free variables to bound variables is not influenced by other factors that are not investigated.
Control variables are usually used in comparative research. This variable is used to ensure that the results of the research are obtained from objects that are being studied, not because of other things outside of research.
For example, you examine the influence of the duration of learning (free variables) on the value of the test (bound variables). On the other hand, research results can vary because there are other things that may have an impact such as health, bedtime, and so on. So that the results are not biased, health conditions, bedtime, or other things must be controlled so that research results are valid.
This controlled variable is important for several reasons, for example facilitating the reproduction of the experiment later. In addition, it also eliminates biases on the results of the study so that trust increases.
Control variables can be determined directly by researchers. When setting variables to remain under control, researchers can use protocols in detail and with each other. Researchers need to do detailed recording so that the implementation of protocols can be carried out on all variables.
Protokok yang diterapkan bisa berbagai-macam, misalnya menetapkan waktu, cara teknis, atau hal lain secara sama.
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