Major themes in child development: why do we study children, raising children. It takes kids longer to make a rational decision (information to go to the frontal lobe) so going into the turtle pose it gives them time to think: choosing social policies. Knowledge of child development permits informed decisions about social-policy questions that affect children. E. g. , research can inform social policies, such as those involving testimonies from preschool children. If kids were so see a crime and they were questioned about it after if they could explain in detail what happened. 34% of kids will change their answer because they way the question was asked: understanding human nature. Child-development research provides insights into intriguing questions regarding human nature. e. g. , children adopted from inadequate orphanages in romania: human nature is sufficiently flexible, but the timing of experiences is also important.