About ADHD

ADHD (Attention Deficit Hyperactivity Disorder) is a neurodevelopmental condition which is understood to affect 3-4% of the adult population.

Understanding ADHD

To learn about ADHD, please see our Performance Mindset microsite.

This resource aims to provide a clear understanding of ADHD for adults.

It begins with an explanation of what ADHD is, the process of assessment for adults, and the various interventions available for managing the condition.

Learn about ADHD

How can it impact people?

ADHD affects an individual’s behaviour and includes significant symptoms of inattention, hyperactivity, and impulsiveness. These symptoms will have been evident since early childhood.

Inattention

Difficulties with inattention may include:

  • Being very easily distracting and struggling to concentrate
  • Difficulties staying organised
  • Finding it hard to manage time effectively
  • Failing to meet deadlines
Hyperactivity

Difficulties with hyperactivity may include:

  • Feeling restless all the time time
  • Difficulties staying still
  • Struggling to wait your turn
  • Being impatient with others
Impulsivity

Difficulties with impulsivity may include:

  • Saying or doing things rashly and without thinking about the consequences
  • Unpredictable actions and behaviour.

Recognising ADHD

ADHD affects people in different ways and not everyone will display all the symptoms (or display symptoms in the same way).

Some people may receive an ADHD diagnosis as a child. Childhood behaviours may persist into adulthood but they may also change or diminish over time.

Some people learn to manage their symptoms of ADHD through coping strategies over time.

Page last reviewed: 15 December, 2025