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IB Psychology Revision

Biological Approach

The brain and behaviour, hormones and pheromones, and genetics and behaviour.

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Biological Approach is a core part of IB Psychology. Revise the key concepts and common mistakes below, then lock them in with the free games.

Key concepts

Frontal lobePlanning, decision, personality
Parietal lobeTouch and spatial awareness
Temporal lobeHearing and memory
Occipital lobeVision processing
AmygdalaEmotion and fear processing
HippocampusLong-term memory consolidation
Twin studyMZ vs DZ to estimate heritability
Heritability% variance from genes in a population
GenotypeGenetic make-up
PhenotypeObserved traits — genotype × environment
EpigeneticsGene expression altered by environment
NeuroplasticityBrain rewires with experience
NeurotransmitterChemical messenger at the synapse
DopamineReward, movement, motivation

What your exam board covers

Where Biological Approach sits in each exam board's specification. Tap a board to see what it lists.

HLBiological Approach to Behaviour
  • The brain and behaviour (localisation, neuroplasticity, techniques)
  • Hormones and pheromones
  • Genetics and behaviour
  • The role of neurotransmitters
  • Ethics and research methods in the biological approach

Source: IB Diploma Psychology guide (first assessment 2027), accessed 23 July 2026.

SLBiological Approach to Behaviour
  • The brain and behaviour (localisation, neuroplasticity, techniques)
  • Hormones and pheromones
  • Genetics and behaviour
  • The role of neurotransmitters
  • Ethics and research methods in the biological approach

Source: IB Diploma Psychology guide (first assessment 2027), accessed 23 July 2026.

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More IB Psychology topics

Cognitive ApproachSociocultural ApproachResearch MethodsOptions
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