Getting Started
Why do you study for one class but not another? Why do you eat when you’re not hungry? Motivation is the psychological force that initiates, guides, and maintains goal-oriented behaviors. It is the "why" behind everything we do, from the most basic biological urges like eating to the most complex social ambitions like seeking a sense of belonging.
What You Should Be Able to Do
Explain how different theories account for motivated behaviors.
Compare and contrast the influence of intrinsic and extrinsic factors on motivation.
Describe the biological and environmental factors that motivate eating behavior.
Apply motivational conflict theory to analyze everyday choices.
Differentiate between human motivation and the instinctual drives seen in other animals.
Key Developments & Analysis
Motivation is not a single concept but a collection of theories that attempt to explain why behavior begins and what sustains it. These theories often focus on different drivers, from internal biological states to external rewards and the simple desire for new experiences.
Theories of Motivation
Psychologists have proposed several major theories to explain motivation. These theories are not mutually exclusive; they often explain different facets of the same behavior.
| Theory | Core Claim | Mechanism (How It Works) | One Example |
|---|---|---|---|
| Drive-Reduction Theory | We are motivated to act in order to reduce internal tension caused by unmet biological needs. | A physiological need (e.g., for water) creates an aroused state (a drive, like thirst) that motivates an organism to satisfy the need. | Drinking water when you are thirsty to reduce the discomfort of thirst. |
| Arousal Theory | We are motivated to maintain an optimal level of physiological arousal. | When arousal is too low, we seek stimulation. When it is too high, we seek to reduce it. The optimal level varies by person and task. | A bored student starts a conversation; an anxious student takes deep breaths before a test. |
| Sensation-Seeking Theory | People are motivated by the need for varied, novel, and complex sensations and experiences. | This is a specific application of arousal theory, suggesting some individuals have a higher optimal arousal level and are driven to seek out thrills. | Riding a roller coaster or trying exotic foods for the thrill and novelty. |
| Self-Determination Theory | People are motivated by intrinsic (internal) or extrinsic (external) factors. | We are driven by an inherent desire for growth, which is supported by feelings of competence, autonomy, and relatedness. | An artist paints for the joy of creating (intrinsic) or to win a cash prize (extrinsic). |
| Instinct Theory | Behavior is driven by instincts—complex, unlearned behaviors that are rigidly patterned throughout a species. | An innate biological force compels a specific, fixed pattern of behavior in response to certain stimuli. | While central to non-human animals (e.g., salmon migrating), this is not a primary motivator for complex human behaviors. |
Motivational Conflicts
Choices are rarely simple. Kurt Lewin’s motivational conflicts theory proposes that we often face dilemmas when competing motivations pull us in different directions. Resolving these conflicts is a key part of motivated behavior.
Approach-Approach Conflict: A choice between two equally attractive options (e.g., choosing between two desirable vacation destinations).
Avoidance-Avoidance Conflict: A choice between two equally unattractive options (e.g., choosing between doing a difficult homework assignment or doing a boring chore).
Approach-Avoidance Conflict: A single option has both attractive and unattractive qualities (e.g., a promotion offers more pay but also more stress).
The Motivation of Eating
Eating is a prime example of a complex motivated behavior involving an interaction of physical and mental processes. It is not driven by a single factor but by a rich interplay of biology and environment.
Physical Processes:
- Hormones: The body uses chemical messengers to regulate hunger. Ghrelin, a hormone secreted by an empty stomach, sends "I'm hungry" signals to the brain. After eating, fat cells release leptin, which signals "I'm full" to the brain, increasing satiety.
Mental & External Processes:
- External Cues: Hunger is not just an internal state. The presence of appealing food, the time of day (e.g., lunchtime), or social gatherings centered around meals can all trigger a desire to eat, even in the absence of physical hunger.
Data & Organization Tools
This matrix compares the primary focus and key ideas of the major motivation theories.
| Theory | Primary Focus | Key Idea | Example Behavior |
|---|---|---|---|
| Drive-Reduction | Biological Needs | Reducing internal tension or "drives" to return the body to a state of balance (homeostasis). | Putting on a sweater when you feel cold. |
| Arousal | Optimal Stimulation | Seeking a level of excitement or arousal that is personally optimal; avoiding boredom and stress. | Watching a scary movie for excitement. |
| Self-Determination | Cognitive & Social | Fulfilling innate psychological needs for autonomy, competence, and relatedness through internal or external rewards. | Mastering a new skill for a sense of accomplishment. |
| Sensation-Seeking | Novel Experiences | A specific type of arousal theory where the drive is to experience new, varied, and intense sensations. | Traveling to an unfamiliar country. |
Evidence Bank
Drive-Reduction Theory: A theory stating that a physiological need creates an aroused tension state (a drive) that motivates an organism to satisfy the need.
Arousal Theory: A theory of motivation suggesting that people are motivated to maintain an optimal level of alertness and physical and mental activation.
Self-Determination Theory: A theory of motivation that is concerned with the beneficial effects of intrinsic motivation and the harmful effects of extrinsic motivation.
Kurt Lewin: A psychologist who developed a theory of motivational conflicts, identifying approach-approach, avoidance-avoidance, and approach-avoidance conflicts.
Ghrelin: A hunger-arousing hormone secreted by an empty stomach.
Leptin: A hormone produced by fat cells that signals satiety and suppresses appetite.
Intrinsic Motivation: A desire to perform a behavior effectively for its own sake, based on internal satisfaction.
Extrinsic Motivation: A desire to perform a behavior to receive promised rewards or avoid threatened punishment.
Approach-Avoidance Conflict: A conflict occurring when a person must choose or not choose a goal that has both positive and negative aspects.
Instinct: A complex, unlearned behavior that is rigidly patterned throughout a species.
Skill Snapshots
Mechanism Pairs
Cause: An empty stomach secretes ghrelin. → Effect: The brain receives hunger signals, motivating the search for food.
Cause: A task is too easy and becomes boring (low arousal). → Effect: The individual seeks a more challenging or stimulating activity.
Cause: A student is offered money for good grades. → Effect: The student's studying behavior is driven by extrinsic motivation.
Perspective Contrasts
Drive-Reduction vs. Arousal Theory: Drive-reduction theory explains motivation as an effort to eliminate tension (like thirst), while arousal theory explains motivation as an effort to achieve an ideal level of stimulation, which may involve increasing tension (like seeking a thrill).
Intrinsic vs. Extrinsic Motivation: Intrinsic motivation comes from within, such as the joy of learning a new language. Extrinsic motivation comes from outside, such as learning a new language to get a job promotion.
Instinct Theory vs. Human Motivation: Instinct theory effectively explains the fixed, unlearned behaviors of many non-human animals (e.g., birds building a specific type of nest). It is less useful for explaining the vast majority of human behaviors, which are shaped by learning, culture, and complex cognition.
Change Track: Motivation to Eat
Baseline: An individual eats three meals at regular times each day, driven by habit and moderate hunger cues.
Change 1 (Biological): After skipping lunch, the individual's ghrelin levels spike, creating a powerful biological drive to find and consume food.
Change 2 (Environmental): While walking home after a full dinner, the individual smells a bakery and feels a sudden desire for a pastry, an external cue overriding satiety signals.
Persistence: The habit of having a snack while watching TV in the evening continues, even when the individual feels neither physically hungry nor particularly aroused by the food.
Common Misconceptions & Clarifications
Misconception: Motivation is just about "willpower."
- Clarification: Motivation is a complex interplay of biological factors (hormones, brain circuits), psychological needs (arousal, competence), and environmental influences (rewards, social cues). Willpower is only one small cognitive component.
Misconception: Humans are primarily driven by instincts, just like other animals.
- Clarification: While humans may have innate predispositions, our behavior is overwhelmingly shaped by learning, culture, and conscious thought, not the rigid, fixed-action patterns that define instincts in other species.
Misconception: Eating is simply a response to being hungry.
- Clarification: Eating is influenced by a host of external factors, including the time of day, social settings, and the simple sight or smell of food, often leading us to eat even when our biological need for energy is met.
Misconception: All motivation is good.
- Clarification: Extrinsic motivation (like being paid for a hobby) can sometimes undermine intrinsic motivation (doing the hobby for pure enjoyment), a phenomenon known as the overjustification effect.
One-Paragraph Summary
Motivation explains the driving forces behind our actions, from satisfying basic biological needs to pursuing complex personal achievements. Theories like drive-reduction and arousal theory focus on how we regulate internal states, while self-determination theory highlights the powerful distinction between internal satisfaction (intrinsic) and external rewards (extrinsic). Specific behaviors, such as eating, demonstrate this complexity, as they are guided by an intricate dance between internal hormonal signals like ghrelin and leptin and powerful external cues from our environment. Understanding these different theories and their applications allows us to appreciate that motivation is not a single force but a multifaceted process that directs our behavior and shapes our lives.