Most children have a hard time with their complex emotion about their siblings; they basically face a mixed feelings, a sense of protectiveness as well as pushing them down the stairs, therefore sometimes they tangle-up with emotions. Sometimes this harsh feelings comes out of jealousy with the conception that their parents favor their siblings more, however it is the parents responsibility to make them understand nicely and not to be too strict with them because in that way they might feel threatened and be more stubborn about it. It is very important for children that they get accepted by their parents for who they are. Parents usually have a tendency to compare their child with the siblings; this is a major cause of the source of their anger towards their siblings. Therefore parents should never compare. Siblings can often have different temperament and is another issue for the cause of aggression.
If a child reacts in a supermarket and starts shouting then the parents should first take him outside somewhere and then make him or her calm and then finally talk to him or her about the cause of their temper. More than often it is seen that the child is behaving in a more aggressive way in a supermarket that happens because he or she gets excited by all the luxurious things they see around and many people. Sometimes it also happens because some other kid was crying and they adapt their behavior. Children are very prone in adapting behavior and therefore often the parents catch them off guard for behaving in an unnatural way which they usually don’t.
If the child is not listening as they are being told then at first the parents have to let the child be and then should make him understand politely instead of charging him. The child should be explained the consequence of not listening but in a threatening attitude rather in a more logical way. This will make the child be more sincere and logical. It often happens that the reasoning also does not work, in that case one has to let the child do as they feel and make them experience their own consequence, in that way their realization will come from within.
Blackwell, Courtney K., Alexis R. Lauricella, and Ellen Wartella. "Factors influencing digital technology use in early childhood education." Computers & Education 77 (2014): 82-90.
Froiland, John Mark, Aubrey Peterson, and Mark L. Davison. "The long-term effects of early parent involvement and parent expectation in the USA." School Psychology International 34.1 (2013): 33-50.