ths and weaknesses, and a recognition of the need for cooperative behavior. Peer-group conformity reaches a peak when children are about 12 years of age. Conformity never disappears, but its manifestations among adults are less obvious. The members of peer groups change with age. Preadolescent groups are homogeneous; that is, members are usually of the same sex and come from the same neighborhood. Among older children, social relationships are based on shared interests and values. Within a given group, the popular children tend to be more intelligent, higher achievers, and socially and emotionally more mature.Much current work involves identifying the cognitive components (such as memory and attention span) used in problem-solving activities. Researchers also are trying to identify the processes that occur in the transition from one level of thought to the next. Another area of investigation is the cognitive components in reading and arithmetic. It is hoped that this research will lead to improved methods of teaching academic skills and more effective remedial teaching....