chapter  3
Psychiatric disorders and challenging behaviour
ByDavid Clarke
Pages 12

Introduction Learning disability is a condition characterised by significantly impaired cognitive functioning associated w ith problems w ith adaptive and social functioning, w hich becomes apparent before the age of 18 years. Psychiatric disorders are distinct from learning disabilities, and are characterised by abnormalities of em otional or behavioural functioning, relationships or thinking w hich are of a duration or severity that causes persistent suffering or handicap to the person concerned, or distress and disturbance to those in contact w ith him or her.