4.2.1 (HL)—Motivation and health

Motivation is the set of processes that starts, directs and sustains behaviour. In health, the useful question is what makes a person begin a behaviour and continue it when the immediate reward is weak or the cost is high.

Intrinsic motivation comes from interest or value in the activity itself; extrinsic motivation depends on an external reward or consequence. Rewards can support an action, but making a valued activity feel transactional can weaken autonomous commitment.

A smoking-cessation plan might combine a personally meaningful health goal with a short-term reward for each smoke-free week. The reward can help start the behaviour, while autonomy, confidence and feedback determine whether it lasts after the reward stops.

There is no single ‘best’ motivator. A reward may increase the target behaviour without changing the underlying reason, and a short study cannot prove lasting health change. State the behaviour, mechanism, time scale and population before generalising.

Self-determination theory predicts more durable health behaviour when autonomy, competence and relatedness are supported: the person has meaningful choice, can see achievable progress and feels supported rather than controlled. A prevention or treatment programme can offer options, graded goals and informative feedback; evaluate initiation, adherence and maintenance after incentives end rather than counting enrolment alone.