Psychology › Section I · Lifespan development › Topic I.1

What is lifespan development?

You are not the person you were at five, yet you are clearly still that person. Developmental psychology studies both facts: how people change from conception to old age, and what stays the same. This topic sets out its domains, its methods and the three big questions every theory has to answer.

In this topic

  • Change across a whole life
  • Three domains of development
  • How development is studied
  • Designs for studying age
  • Norms and milestones
  • Question 1: continuous or in stages?
  • Question 2: one course or many?
  • Question 3: nature and nurture
  • Worked example: choosing a design
  • Worked example: checking a famous gap
  • Common mistakes to avoid
  • Key takeaways

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