Research by Eric Lacourse, a researcher at the University of Montreal, has shown that the development of physical aggression in young children is closely linked to genetic factors and has little to do with environmental factors.Lacourse and his co-workers with parents of identical and twin twins have created and compared children's behavior, environment and genetic characteristics. "Analysis of the gene environment has shown that juvenile genetic factors account for the most in terms of developmental trends, and these explain, to a large extent, the stability and change of physical aggression." "However, it is important to emphasize that these genetic interrelationships do not indicate that physical aggression is an early cause of change and that it is irreversible." developmental experts have been heavily influenced by social learning theories, which suggest that physical aggression its development and development is mainly determined by the cumulative influence of aggressive exemplars in the social environment and in the media. THE physical aggression in childhood however, the results of his studies show that physical aggression begins in infancy and peaks in 2-4 years.
The cause of aggression is genetics?
Research using genetic proximity has shown that genetic factors are generally different from those in the general population over the lifetime of the human population.
Lacourse and his colleagues have examined three samples for the development of genetic and environmental factors in physical aggression. First, according to the most common point of view, both sources of influence are ubiquitous and play a role in the stability of physical aggression. Second, a "genetically determined point" model suggests that a single set of genetic factors may be responsible for the level of physical aggression as time progresses. The third pattern, the so-called "genetic breakdown", suggests that as age advances, new sources of genetic and environmental factors appear. "According to the genetic hypothesis, new environmental factors contributing to physical aggression have a short duration of genetic factors," Lacourse summarized the results.