What behaviours do children with emotional problems usually have?

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For example, overly anxious children may withdraw from others and have difficulty sustaining social interactions, angry children may display oppositional or defiant behaviour, aggression, or both, and depressed children may appear to be overly sad and fail to initiate activities with others. The range of behaviours displayed, however, can be large and confusing when attempting to link behavioural changes to underlying emotional states.