A controlled variable is one which is not allowed to change unpredictably during an experiment. Because they are ideally expected to remain the same, they are also called constant variables.
An example of a constant variable could be the voltage from a power supply. If you are examining how electricity affects an experimental subject, you would keep the voltage constant, as otherwise the energy supplied would change as the voltage did.
operational definition of a manipulated variable
A controlled variables are what stayed the same and is compared to other variables
operational definition of a manipulated variable
a control variable is a variable that needs to be controlled
There are not any similarities between a control and a variable. However, a Control Variable, is a variable.
describes how to measure a variable or define a term. right out of my science book
Manipulated variable is also known as Independent variable and is the factor that you change in an experiment. For example if you were measuring the effects of alcohol on driving ability the manipulated variable would be alcohol, either with or without alcohol.
You can control it that's why its called control variable.
A control variable is a variable that is held constant in a research analysis.
who to control one variable at time
Control
No, the independent variable and the control variable cannot be the same. The independent variable is what is being changed or manipulated in an experiment to observe its effect on the dependent variable, while the control variable is kept constant to minimize its impact on the results. Having them be the same would defeat the purpose of having a control variable.