Maternal education, marital status, and the number of children in a family are all important factors in a child's achievement. There is a higher rate of teenage pregnancies in poor individuals, which has a negative effect on both children and parents. One consequence is low birth weight among teenage mothers (this is more common in poor young mothers than in older mothers). Children of teenage mothers also score lower on standardized language tests and have problems with intellectual functioning in the preschool and elementary school years. The reason for this is inadequate education and a non-intellectual environment for the development of children. These children are often victims of abuse and abandonment. (Huston 1991) A mother's discussion of financial matters and personal problems with her children, and a greater demand for children's involvement in maintaining the home, places greater responsibility on the child. Commands without explanation and little reward for good behavior, combined with poor communication also promote melancholy in the child. A parent's behavior is not only entirely their fault, because "low income reduces parents' ability to be good parents, not because poor families have less money to invest in their children, but because low income decreases the quality of parents." non-monetary investments, such as those of parents". ' interactions with their children. This in return compromises children's chances of success." (Mayer 1997) Parental stress in return influences children's outcomes and causes psychological problems, such as high attention deficit from parents to children and hyperactivity disorder in children.