Note: The research diagnosis of hyperkinetic disorder requires the definite presence of abnormal levels of inattention, hyperactivity, and restlessness that are pervasive across situations and persistent over time and that are not caused by other disorders such as autism or affective disorders.
Inattention. At least six of the following symptoms of inattention have persisted for at least 6 months, to a degree that is maladaptive and inconsistent with the developmental level of the child:
(1) often fails to give close attention to details, or makes careless errors in schoolwork, work, or other activities;
(2) often fails to sustain attention in tasks or play activities;
(3) often appears not to listen to what is being said to him or her;
(4) often fails to follow through on instructions or to finish schoolwork, chores, or duties in the workplace (not because of oppositional behaviour or failure to understand instructions);
(5) is often impaired in organising tasks and activities;
(6) often avoids or strongly dislikes tasks, such as homework that requires sustained mental effort;
(7) often loses things necessary for certain tasks or activities, such as school assignments, pencils, books, toys or tools;
(8) is often easily distracted by external stimuli;
(9) is often forgetful in the course of daily activities.
Printed here with kind permission of The World Health Organization from: WHO, The International Classification of Diseases, 10th edn (Vienna: WHO, 1990).