What is the meaning of Controlled Variable? and Uncontrolled Variable?
A controlled variable, sometimes called an independent variable, is a variable in an experiment that the researcher intentionally manipulates or controls. Its purpose is to determine how changes in this variable impact the outcome of the experiment. The researcher carefully selects and sets the values of the controlled variable to observe its effect on the dependent variable.
On the other hand, an uncontrolled variable, also known as a confounding variable, is a variable that is not planned or deliberately manipulated by the researcher but can still influence the outcome of the experiment. These variables may occur naturally or unintentionally impact the experiment. Uncontrolled variables can potentially introduce bias or distort the results of the study.
To identify controlled and uncontrolled variables in an experiment, you need to consider the following steps:
1. Understand the purpose of the experiment: Determine what specific question the experiment is designed to answer and what variables are meant to be studied.
2. Identify the variables: Determine the variables involved in the experiment. Variables can be categorized as controlled, uncontrolled, or dependent (the variable being measured or observed).
3. Manipulate the controlled variable: Determine which variable(s) you will intentionally manipulate or control in order to see how they influence the dependent variable.
4. Control for uncontrolled variables: Identify potential confounding variables that might affect the outcome of the experiment. Try to minimize their impact by keeping them constant throughout the study or randomizing their effects.
By understanding the concept of controlled and uncontrolled variables and following these steps, you can design and conduct experiments that provide reliable and accurate results.