A neurodevelopmental disorder characterized by persistent patterns of inattention, hyperactivity, and impulsivity that interfere with functioning.
Descriptive compound: attention (Latin 'attentio') + deficit (Latin 'deficere,' to fail) + hyperactivity (Greek 'hyper-' + Latin 'activitas'). Often abbreviated ADHD.
ADHD isn't a lack of attention — it's attention that works differently. People with ADHD can hyperfocus on things they love but struggle with things they find unstimulating.
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