A neurological disorder with differences in brain development and brain activity with issues regarding attention paying, the ability to sit still, and self-control.

• Inattentive - a person shows symptoms of inattention or gets easily distracted, not hyperactive
• Hyperactive/impulsive - a person has symptoms of hyperactivity and impulsivity but not inattention
• Combined - when a person has symptoms of inattention, hyperactivity, and impulsivity

ADD or Attention Deficit Disorder

It is a neurological disorder that causes a range of behaviour problems such as difficulty attending to instruction, focusing on schoolwork, keeping up with assignments, following directions, completing tasks and social interaction without hyperactivity.