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Why is my 7 year old constantly rude and annoying her sister. Even with rewards or with threats.

Constant bickering with a sibling is very common at age 7 and is usually about competing for your attention, not a sign something is wrong. Rewards and threats often fail when they are not immediate, not matched to what she actually cares about, or when the real trigger (jealousy, attention, fairness) is never addressed.

Experts say tackling the root cause of the conflict, rather than just reacting to each fight, works better than rewards or punishments alone.

Strength of evidence

Mixed

Advice on sibling conflict comes from paediatric expert guidance and clinical experience rather than randomized trials specific to siblings. Research on why rewards or punishments 'stop working' comes from behavioural science reviews and studies of clinical groups (like ADHD or conduct problems), which may not all apply to a typical 7-year-old.

What the evidence says

Fighting between brothers and sisters is extremely common at this age. It does not usually mean something is wrong with your daughter or your parenting. Kids this age are still learning how to share attention, deal with jealousy, and handle frustration with words instead of actions.

A lot of sibling conflict is really about wanting more of your attention. If being 'rude and annoying' gets a big reaction from you, even a negative one, that reaction can accidentally become the reward, because attention of any kind still feels better to a child than being ignored.

Rewards and threats sometimes stop working because they are not lined up correctly. A reward only works if the child actually wants it, and if it comes right after the good behaviour, not hours later. The same goes for consequences: they work best when they are immediate, consistent, and not so harsh that the child tunes them out entirely.

Sometimes the fighting is really about something underneath, like feeling less special than a sibling, boredom, or not having a good way to solve problems yet. Coaching her through what to do instead, and giving her calm one-on-one time so she is not fighting for your attention, tends to work better than rewards or punishment on their own.

If the behaviour is extreme, aggressive, or does not improve no matter what you try over weeks or months, it is worth mentioning to your child's doctor. Occasionally, ongoing resistance to both rewards and consequences can be a sign of something else going on that a professional can help sort out.

Sources

✓Reviewed by CH, MD, FRCPC

Reviewed by a specialist physician certified by the Royal College of Physicians and Surgeons of Canada, who has read this answer against the sources listed above and confirmed it reflects them. That is not medical advice about your child. How we review

Answer checked August 5, 2026

Educational information only. Not medical advice, not a diagnosis, and no doctor-patient relationship is created by using this. Founded Parent has not examined your child and does not know their history, so this may not apply to you. In an emergency, call your local emergency number. What Founded Parent cannot do

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