# 2.2.3 Attention deficit hyperactivity disorder (ADHD)

ADHD is marked by inattention and hyperactive-impulsive behaviour. Symptoms may include difficulty focusing, forgetfulness, easily distracted, fidgeting, excessive talking and difficulty awaiting turns. ADHD symptoms hinder social, academic or occupational functioning. ADHD symptoms must be present before age 12 for a formal diagnosis. Interestingly, 25-40% of individuals with dyslexia are also diagnosed with ADHD and vice versa (Ciulkinyte et al., 2024).

## Further resources

For a complete list of the criteria for an ADHD diagnosis in children and adults, visit ADHD UK. You may also want to study the 12-hour OpenLearn course Understanding ADHD.

OpenLearn - Understanding dyslexia
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