A controlled variable, also known as a control variable or constant, is a factor that remains unchanged throughout an experiment or research study. It is not the primary focus of the investigation but is controlled because it could influence the outcomes. The purpose of a controlled variable is to assess the relationship between multiple variables by ensuring that the test results can be compared fairly and are not skewed.
In scientific experimentation, a controlled variable is a factor that is kept the same for every test or measurement to ensure that the results can be compared fairly. In research studies, control variables help establish a correlational or causal relationship between variables by enhancing internal validity. These variables are different from control groups, which are used to compare the effects of different treatments or conditions.
Here are some key points about controlled variables:
- They are not the primary focus of the research but are controlled to prevent them from influencing the outcomes.
- Researchers should identify and record the values of control variables to help other researchers understand and replicate the results.
- Control variables can be controlled by keeping their values constant for all observations in an experiment.
- The purpose of a controlled variable is to create a baseline for comparison and better understand the relationship between other variables.
