A. Either (1) or (2):
1. six (or more) of the following symptoms of inattention have persisted for at least 6 months to a degree that is maladaptive and inconsistent with developmental level:
(a) often fails to give close attention to details or makes careless mistakes in schoolwork, work, or other activities;
(b) often has difficulty sustaining-attention in tasks or play activities;
(c) often does not seem to listen when spoken to directly;
(d) often does not follow through on instructions and fails to finish schoolwork, chores, or duties in the workplace (not due to oppositional behaviour or failure to understand instructions);
(e) often has difficulty organising tasks and activities;
(f) often avoids, dislikes, or is reluctant to engage in tasks that require sustained mental effort (such as schoolwork or homework);
(g) often loses things necessary for tasks or activities (e.g. toys, school assignments, pencils, books, or tools);
(h) is often easily distracted by extraneous stimuli;
(i) is often forgetful in daily activities.
2. six (or more) of the following symptoms of hyperactivity-impulsivity have persisted for at least 6 months to a degree that is maladaptive and inconsistent with developmental level:
Printed here with kind permission of the American Psychiatric Association from: Diagnostic and Statistical Manual of Mental Disorders, 4th edn (Washington, DC: APA, 1994).