Independent variable is defined as

Independent variable is defined as

• A. The variable believed to cause some variation in another variable
• B. The variable measured to explain the results
• C. A variable that is always constant
• D. A variable that is the same as the dependent variable

Answer: (A)

In research, you deliberately change or vary this factor to see if it causes a change in another outcome. The independent variable is the variable believed to cause variation in another variable, and that’s what you manipulate or categorize in the study. For example, if you want to test whether amount of study time affects test scores, study time is the independent variable and test scores are the dependent variable—the outcome you measure. The other ideas don’t fit because the variable described as measured to explain results is the outcome you observe (the dependent variable), not the one you change. A variable that is always constant isn’t something you manipulate to test effects. And saying it’s the same as the dependent variable confuses cause with effect. So, the best answer is the one that correctly identifies the independent variable as the factor you believe causes variation in another variable.

In research, you deliberately change or vary this factor to see if it causes a change in another outcome. The independent variable is the variable believed to cause variation in another variable, and that’s what you manipulate or categorize in the study. For example, if you want to test whether amount of study time affects test scores, study time is the independent variable and test scores are the dependent variable—the outcome you measure.

The other ideas don’t fit because the variable described as measured to explain results is the outcome you observe (the dependent variable), not the one you change. A variable that is always constant isn’t something you manipulate to test effects. And saying it’s the same as the dependent variable confuses cause with effect. So, the best answer is the one that correctly identifies the independent variable as the factor you believe causes variation in another variable.