Psychology · Year 13 · Issues and Debates in Psychology · 1.º Período

The Nature-Nurture Debate

Students investigate the relative importance of heredity and environment in determining behaviour. The interactionist approach is highlighted as a modern synthesis of this classic debate.

TL;DR:The Nature-Nurture debate examines the extent to which our traits and behaviours are the result of heredity (nature) or environmental influences (nurture). In Year 13, the focus shifts from a simple 'either/or' argument to the interactionist approach. This includes studying the diathesis-stress model and the emerging field of epigenetics, which shows how environmental factors can actually switch genes on or off.

• National Curriculum Attainment Targets
• AQA A-level Psychology 7182 - 4.3.1.4
• AQA A-level Psychology 7182 - 4.2.1

About This Topic

The Nature-Nurture debate examines the extent to which our traits and behaviours are the result of heredity (nature) or environmental influences (nurture). In Year 13, the focus shifts from a simple 'either/or' argument to the interactionist approach. This includes studying the diathesis-stress model and the emerging field of epigenetics, which shows how environmental factors can actually switch genes on or off.

This topic is central to the AQA specification because it connects biological psychology with social and developmental theories. It requires students to handle complex data from twin and adoption studies while considering the ethical implications of 'biological necessity.' Students grasp this concept faster through structured discussion and peer explanation, as they can debate the nuances of how their own lives have been shaped by both their families and their surroundings.

Key Questions

1. How do genetics and environment interact to shape behaviour?
2. What is the diathesis-stress model?
3. How can epigenetics explain transgenerational behavioural changes?

Watch Out for These Misconceptions

Common Misconception

Nature and nurture are two separate, competing forces.

What to Teach Instead

In reality, they are inextricably linked. For example, a child's genetic temperament (nature) influences how their parents treat them (nurture). Active modelling of these feedback loops helps students move past the 'versus' mentality to an interactionist one.

Common Misconception

High concordance rates in twin studies prove a trait is 100% genetic.

What to Teach Instead

Even identical twins rarely have 100% concordance for complex behaviours, and they often share the same environment. Peer analysis of data helps students spot that environment is almost always a factor, even in biological studies.

Active Learning Ideas

Structured Academic Controversy

Collaborative Problem Solving: The Diathesis-Stress Model

Provide students with case studies of individuals with a genetic predisposition for a condition like schizophrenia. Groups must identify specific environmental 'stressors' that might trigger the condition and explain the interaction using a visual model.

40 min·Small Groups

Think-Pair-Share

The Epigenetics Puzzle

Students watch a short clip on the Dutch Hunger Winter or similar epigenetic studies. They work individually to define 'epigenetics,' pair up to explain it to each other using a metaphor, and share their metaphors with the class.

25 min·Pairs

Gallery Walk

Twin Study Data

Display concordance rates for various traits (IQ, schizophrenia, eye colour) from famous twin studies. Students move around the room to determine which traits lean more toward nature or nurture and identify the 'missing percentage' that suggests interactionism.

35 min·Small Groups

Frequently Asked Questions

What is the interactionist approach in psychology?

The interactionist approach suggests that instead of nature and nurture working in isolation, they interact in complex ways. It argues that our genetic blueprint provides a range of possibilities, but the environment determines how those genes are expressed. This is now the dominant view in modern psychology, moving away from the old 'nature versus nurture' dichotomy.

How does the diathesis-stress model work?

This model explains behaviour as the result of a biological vulnerability (the diathesis) and an environmental trigger (the stressor). For example, someone might have a genetic predisposition for depression, but they only develop the disorder if they experience a significant life trauma. Without the stressor, the condition may never manifest.

What is epigenetics and why does it matter?

Epigenetics is the study of how environmental factors, like diet or stress, can cause changes that affect the way your genes work. Unlike genetic changes, epigenetic changes do not change your DNA sequence, but they can change how your body reads a DNA sequence. This provides a physical mechanism for how nurture can influence nature across generations.

How can active learning help students understand the nature-nurture debate?

Active learning, such as collaborative problem-solving with case studies, helps students move beyond memorising definitions. When they have to apply the diathesis-stress model to a real-world scenario, they begin to see the 'interaction' rather than just two separate lists of factors. This makes their exam evaluations much more sophisticated and grounded in evidence.