Topic 4.6 Notes – Motivation

What Motivation Is

Motivation includes the processes that initiate, direct, energize, and sustain behavior. It explains:

• why behavior begins
• why one goal gets chosen over another
• how intense the behavior is
• why it continues or ends

A few terms are easy to mix up, so keep them separate:

• Need means a condition required for well-being, like water or social connection.
• Drive means internal tension caused by an unmet need.
• Incentive means an outside reward or outcome that pulls behavior.
• Motive is the general reason for behavior. It can be internal, external, or both.

One behavior can have more than one motive. You might eat because you're hungry, because food smells good, because it’s lunchtime, and because friends are eating with you.

The Main Theories of Motivation

Drive-reduction theory

This theory explains behavior as an effort to reduce physical tension and restore homeostasis, which means a stable internal state.

The sequence works like this:

1. physiological deficit
2. drive state
3. motivated behavior
4. drive reduced and balance restored

Dehydration → thirst → drinking is the classic example.

This theory fits best with hunger, thirst, and body temperature.

Arousal theory

Arousal theory says people try to maintain an optimal level of activation.

• Too little arousal can feel like boredom.
• Too much arousal can feel like overload or anxiety.

So motivation may raise stimulation or lower it, depending on the situation.

Yerkes-Dodson law

This is arousal theory applied to performance.

The graph shows the classic inverted-U pattern.

Yerkes-Dodson law

• Low arousal → low performance
• Moderate arousal → best performance
• Very high arousal → performance drops

One testable detail students miss is that hard or unfamiliar tasks need lower arousal than easy or well-practiced tasks.

Self-determination theory

This theory asks why you're doing the activity.

• Intrinsic motivation means doing something because it is enjoyable or meaningful in itself.
• Extrinsic motivation means doing it for an outside result, like a grade, money, or praise.

The same behavior can be intrinsic for one person and extrinsic for another. It also connects to autonomy, competence, and relatedness.

Incentive theory

Incentive theory says behavior is pulled by anticipated rewards.

Examples include:

• money
• grades
• praise
• prizes

This overlaps with extrinsic motivation, but the emphasis is on the attractive power of the reward itself.

Instinct theory

Instincts are innate, fixed behavior patterns in non-human animals.

A classic example is an orb-weaver spider building its web.

Orb-weaver spider web

In AP Psych, humans do not show complex instinctual behavior in this strict sense.

Conflict and Stimulation-Based Motives

Lewin’s motivational conflicts

Sometimes motivation comes from resolving a choice.

• Approach-approach means choosing between two good options.
  • Example: two great colleges
• Approach-avoidance means one goal has both good and bad features.
  • Example: a promotion with better pay but a long commute
• Avoidance-avoidance means choosing between two bad options.
  • Example: expensive repair now or worse damage later

The common mistake is missing that approach-avoidance is one mixed option, not two separate choices.

Sensation-seeking theory

This theory focuses on stable differences in how much novelty and intensity people want.

Four forms:

• Experience seeking means wanting new ideas, cultures, art, or environments.
• Thrill and adventure seeking means wanting speed, danger, and physical excitement.
• Disinhibition means wanting socially uninhibited, high-energy stimulation.
• Boredom susceptibility means low tolerance for routine and repetition.

Eating and Belongingness

Hunger and satiety

Eating shows how biology, thinking, and environment work together. The hypothalamus helps regulate hunger and fullness.

• Ghrelin is produced mainly by the stomach and increases hunger.
• Leptin is produced mainly by fat cells and helps signal satiety.

Both hormones signal the hypothalamus, so the hypothalamus is the structure most relevant here.

This connects to drive-reduction because eating can reduce a physiological need.

External influences on eating

People also eat because of outside cues:

• visible or appealing food
• smell and variety
• portion size and access
• time of day and learned meal times
• social setting and culture

So you can eat without strong physiological hunger.

Belongingness

Belongingness is the motivation to form, maintain, and restore social relationships.

It helps explain:

• joining groups
• keeping friendships
• seeking inclusion
• reacting strongly to rejection

A social meal may be about connection as much as hunger. This also links back to relatedness in self-determination theory.

How to Apply the Theories

Match the theory to the part of behavior it explains:

• Drive reduction fits reducing a bodily need.
• Arousal fits changing stimulation level.
• Intrinsic vs. extrinsic fits the reason for doing the activity.
• Incentive fits attraction to a reward.
• Sensation seeking fits preference for novelty or intensity.
• Belongingness fits desire for social connection.

The same behavior may fit more than one theory at once.