In research, something that does not vary is called a

In research, something that does not vary is called a (a) variable

(b) constant

(c) method

(d) control group

✅ Correct option: (b) constant

Explanation:

A constant is a factor that does not change during a research study. Constants help maintain control and reduce bias. Variables change, methods are procedures, and control groups are comparison groups. Therefore, the correct answer is constant.

10 Related PPSC Facts:

Constants do not change Variables change Constants control experiments Improve internal validity Reduce confounding effects Control variables are constants Important in experiments Ensure fairness Constants standardize conditions Essential for scientific research