Unit 4: Social Psychology and Personality

Topic 4.6: Motivation

Last Updated: July 8, 2026
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The Big Picture: What Drives Us?

We are now transitioning from exploring who we are (personality) to exploring why we do what we do. Motivation focuses on the varied reasons behind our behaviors and mental processes. Because human behavior is so complex, psychologists have developed several different theories to explain what exactly pushes us into action.

1. Biological and Arousal Theories of Motivation

Some of the most fundamental theories of motivation focus on our biology, physical needs, and desires:

Yerkes-Dodson Law Graph showing the relationship between arousal and performance
Yerkes-Dodson Law: Notice the inverted U-shape of the curve. Starting on the left, as your arousal (stress or stimulation) increases from a low state, your performance steadily improves because you have increasing attention and interest. At the very peak of the curve is your "sweet spot"—the optimal level of arousal for maximum performance. However, if arousal continues to climb past that peak into the high zone on the right, it turns into strong anxiety, which causes your performance to drop right back down.

2. Intrinsic vs. Extrinsic Motivation

Beyond basic survival, we are motivated by our goals and our environment. Self-determination theory proposes that people are motivated by either intrinsic (internal) or extrinsic (external) motivations.

3. Sensation Seeking Theory

Because humans aren't entirely bound by simple instincts and basic drive reduction, we are often motivated by the need for novel, varied, and complex experiences. Sensation-seeking theory proposes that an individual's natural drive for these unique experiences is a fundamental motivator. Psychologist Marvin Zuckerman identified four distinct types of sensation seeking:

4. Lewin's Motivational Conflicts Theory

Sometimes, our motivation is paralyzed by having to make a choice. Lewin's motivational conflicts theory proposes that choices create psychological conflicts that one must resolve, forming the basis of motivation. You need to know these three types of conflicts:

5. Specific Motivators: Eating and Belongingness

Eating is a complex motivated behavior that perfectly demonstrates how physical and mental processes interact. It isn't just about an empty stomach!

Crash Course Review. Note that Maslow's Hierarchy of Needs and Sex Motivation are outside the scope of the AP Exam.

6. Don't Trip Up! (Common Misconceptions)

⚠️ Drive-Reduction vs. Arousal Theory: Students often confuse these two biological theories. Remember that Drive-Reduction is about reaching a neutral, balanced state of homeostasis (getting rid of an uncomfortable urge). Arousal theory is about seeking stimulation (riding a roller coaster because you are bored). They pull you in opposite directions!

7. Level Up Your Score: Motivation Mastery

Motivation is filled with distinct, multi-part theories. Make sure you can categorize them properly:

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