A Behavioural disorder is a deviation from age - appropriate behaviour that significantly interfers with child development or the lives of others. Examples are inability to learn that cannot be explained by intelect/health/sensory factors, inability to build/maintain satisfactory interpersonal relationships, mood of unhappiness or depression.
5 Things to watch out for:
Easily getting angry or nervous
Always putting the blame on others
Often appearing angry
Questioning authority
Unexpectedly absent