---
title: "Two-Factor Theory — AP Psychology Definition & Exam Guide"
description: "Two-Factor Theory (Schachter-Singer) says emotion = physiological arousal + cognitive label. Learn how it differs from Spearman's g-s theory on the AP exam."
canonical: "https://fiveable.me/ap-psych-revised/key-terms/two-factor-theory"
type: "key-term"
subject: "AP Psychology"
---

# Two-Factor Theory — AP Psychology Definition & Exam Guide

## Definition

The Two-Factor Theory, proposed by Schachter and Singer, states that our experience of emotion is determined by both physiological arousal and cognitive interpretation. In other words, emotions are the result of a combination of physical sensations and our thoughts about those sensations.

## Review

### Related Terms

- [Physiological Arousal](/ap-psych-revised/key-terms/physiological-arousal): Our body's response to emotional stimuli, such as increased heart rate or sweaty palms.
- [Cognitive Interpretation](/ap-psych-revised/key-terms/cognitive-interpretation): The mental process of assigning meaning to sensory information and deciding how to respond emotionally.
- [Emotion](/ap-psych-revised/key-terms/emotion): A complex psychological state that involves a subjective feeling, physiological changes, and behavioral expressions.