---
title: "Independent Variable — AP Psych Definition & Exam Guide"
description: "The independent variable is what a researcher manipulates in an experiment. Learn to spot the IV in AP Psych research scenarios, from Topic 1.3 to Unit 8 therapy studies."
canonical: "https://fiveable.me/ap-psych-revised/key-terms/independent-variable"
type: "key-term"
subject: "AP Psychology"
---

# Independent Variable — AP Psych Definition & Exam Guide

## Definition

The independent variable is the factor in an experiment that a researcher manipulates to see if it has any effect on the outcome.

## Related Study Guides

- [1.3 Defining Psychological Science: The Experimental Method](/ap-psych-revised/unit-1/experimental-method/study-guide/2GX0dM8rra0uAIF9hydm)

## Review

### Related Terms

- Manipulated Variable: This is another term for independent variable, referring to the element that is changed or controlled in an experiment.
- [Control Group](/ap-psych-revised/key-terms/control-group): This is a group in an experiment that does not receive treatment by researchers and is then used as a benchmark to measure how other tested subjects do.
- Experimental Group: This group receives the treatment or manipulation from researchers in an experiment.