The first child more intelligent second son

The experts have excluded genetic factors affect this difference. According to the experts, then it is due to the way teach and conduct of the parents for the child.

To confirm this, experts have studied the subject is second and third child in the family, but became the "eldest" because he or she has lost. Research shows that these objects have an IQ near by who he is, his lost sister. that demonstrates the social impact and the influence of the family have made the change.

Right from small, often unnoticed and treated as the "root" of the family. They are given much more responsibility after having children and parents expect a lot more.

In addition, parents also tend to "experimental" more over the top. So the first child to experience the environment and have the opportunity to contact with more than a third. As with the second son, parents tend to parenting by the experience of TIS in the process of care and nurturing the first child.=