These social classes may correspond roughly to aggressive and withdrawn children.

Most classrooms include at least one highly aggressive child who tries to have his way by bullying.

One reason is that aggressive children tend to be rejected by their classmates.

The social relationships they do form tend to be with other aggressive children.

Relatives and friends described the girl as an aggressive, inquisitive child.

Child development experts are paying closer attention to these aggressive children and trying to intervene at an early age.

Psychologists have found that both aggressive children and their parents tend to focus on what's wrong with a situation rather than what's right.

The aggressive child does not know what to do with the skill he's been developing, and the other child's discomfort makes him uncomfortable.

Families with aggressive children can be helped by teaching the parents to be more consistent and effective in their control methods.

To be sure, not every aggressive child will end up doing poorly; there are several kinds of bullies.