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NotesPsychologyTopic 3.2Influences on development
Back to Psychology Topics
3.2.22 min read

Influences on development

IB Psychology • Unit 3

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Contents

  • Development has many drivers
  • Three kinds of influence
  • Evaluating the influences
In one line: Who we become is shaped by our biology, our thinking, and the people and culture around us — all at once.

In the human development context, a key area of study is the many influences on how a person develops. Development is not driven by one thing: biological maturation, cognitive development, and sociocultural factors (peers, family, culture) all play a part.

This is the classic nature vs nurture debate — and the answer is 'both, interacting'. It links to the concept of perspective: each approach highlights a different influence, and the fullest account combines them.

Memory hook: Nature AND nurture, together. Development is shaped by many interacting influences.

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Key idea: Biological, cognitive and sociocultural influences interact throughout development.

Influences on development

1

Biological maturation

The brain and body develop on a rough timetable — e.g. the planning region matures into the mid-20s, shaping abilities.

2

Cognitive development

Thinking becomes more complex with age and experience — memory, reasoning and understanding grow.

3

Sociocultural influence

Peers, family and culture shape behaviour through enculturation, social learning and social norms.

Maturation · Thinking · Others

Take a teenager becoming more independent. Maturation improves self-control; cognitive development allows better planning; and peers strongly influence choices, while enculturation shapes values. No single influence explains it — this is the concept of perspective applied to development.

Go further — higher-level insight: Peer influence peaks in adolescence. As teens seek independence, peers become especially powerful models and sources of norms (social learning). Recognising when a particular influence is strongest — by developmental stage — is a high-level move.

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Key idea: The influences interact, so isolating any single one is difficult; the best account is integrative.

So each perspective captures part of development but none alone is complete. A strong evaluation stresses that the influences interact — for example, biological maturation and social experience shape each other — so an integrative, biopsychosocial view of development is more defensible than any single-cause account.

Watch out: Nature vs nurture is a false choice. Development is not one or the other — genes and environment continually interact, so avoid arguing for a single winner.

IB Exam Questions on Influences on development

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How Influences on development Appears in IB Exams

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Define

Give the precise meaning of key terms related to Influences on development.

AO1
Describe

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AO2
Explain

Give reasons WHY — cause and effect within Influences on development.

AO3
Evaluate

Weigh strengths AND limitations of approaches in Influences on development.

AO3
Discuss

Present arguments FOR and AGAINST with a balanced conclusion.

AO3

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Related Psychology Topics

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3.1.1Explaining mental health disorders
3.1.2Preventing and treating health problems
3.2.1Development of the self: attachment
3.3.1Interpersonal relationships
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