Psychology is a scientific study of the human mind and its functions. In the present 21st century this area has gained more momentum. Maybe due to nuclear families and single child parents who are chasing for dual income and are not able to concentrate on their own child. Child Psychology study is becoming a more prominent study in younger ages. There are many factors that contribute to the cognitive development of children, adolescents, and young adults. These factors can be categorized into three main topics: environmental factors and how it changes the neurological system, risks of social behavior due to the different mental states, and hormonal changes adding to psychological imbalance.