The conceptualizations of morphogenic processes suggested by systems theorists provide a useful framework for describing growth and development in complex adaptive self-directing organisms. These processes involve changes in (1) a system's structure, state, or functioning; (2) discontinuities in development; and (3) at least two kinds of…

This study longitudinally examined attributes of children's social networks as they changed from the preschool period to middle childhood. The social networks of 75 middle class white children at 3, 6, and 9 years of age were assessed for daily contact and number of contacts with kin, nonkin, adults, peers, and same and opposite sex friends. Data…