Development Matters

Understanding the principle

Children develop across many interacting domains, at different rates and along different trajectories. Attention, inhibition, planning, emotional regulation, language, motor skills and social understanding develop over many years, and rarely in step with each other. Chronological age alone cannot tell us what a child can access in a particular situation.

Development is often uneven. A highly verbal teenager may still find planning, transitions or regulating emotion very difficult, and their strong language can lead adults to expect more than their other systems can yet deliver. Neurodivergent development may follow different pathways, and development is shaped by experience and relationships. Behaviour can therefore reflect a mismatch between what is expected and what a child’s developing systems can currently manage.

In practice, support should be developmentally informed while remaining respectful of age. A teenager who benefits from visual support does not need childish materials, and a young person who needs help to regulate still deserves privacy, respect and a real say. We avoid both developmental determinism and the developmental age trap, and we build expectations around the child’s actual profile rather than a label or a number.