"A survey of certain aspects of socialization in 110 cultures shows that differentiation of the sexes is unimportant in infancy, but that in childhood there is, as in our society, a widespread pattern of greater pressure toward nurturance, obedience, and responsibility in girls, and toward self-reliance and achievement striving in boys. There are a few reversals of sex difference, and many instances of no detectable sex difference; these facts tend to confirm the cultural rather than directly biological nature of the differences. Cultures vary in the degree to which these differentiations are made; correlational analysis suggests some of the social conditions influencing these variations, and helps in understanding why our society has relatively small sex differentiation.".