The following warning signs may indicate that your child is about to rebel:

• Showing undue concern for the welfare or health of others, while neglecting that of his own family
• Visiting a sick person in the hospital, while neglecting his own family
• Taking steps that attract undue attention
• Announcing or attempting suicide
• Lack of appetite
• Lack of desire to participate in family events
• A sudden change in school grades
• Worsening of behavior
• Loosening of social and societal mores
• Attacks on family members
• Excessive weeping
• Increased intensity or number of tantrums
• Loss of a good friend of either gender

No, that's not the entire list. You will have to show some sensitivity in order to determine whether your own child may have a problem.