To this end new research tools and methodologies need to be developed that will focus more on the investigative aspects that can enhance the understanding of the psychological and social development in girls.

Much of the literature on this subject is concerned with the differences as well as the interaction between social and physical aggression and how this correlates with the different sexes. A study that investigates this aspect in-depth is The development of Social Aggression and Physical Aggression: A Narrative Analysis of the Interpersonal Conflicts by Xie et al. The results of this extensive study are similar in some respects to studies already mentioned in this literature review. For example, it was found that girls were more likely to use indirect and social aggression against girls, while boys were more like to use physical aggression against their own sex.

An interesting finding was that physical aggression was "linked to...
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