Although considerable significance has been attributed to sibling relations by behavioral scientists, little empirical research has been conducted regarding the interaction of siblings with each other. Several factors account for the paucity of such research. Social problems involving children have focused attention on the adult-child dimension. Freudian thought has stressed the regimes of infancy, not socializing influences during childhood and youth. Occupational pressures upon family sociologists have prompted an emphasis on dating, courtship, and marital interaction. The attenuation of kinship and certain methodological problems have made study difficult. Nonetheless, research is needed concerning this neglected aspect of family life.