“…Previous reviews have dealt primarily with the findings (Bowlby, 1951;Glaser & Eisenberg, 1956), or with the methodology of a few studies (Pinneau, 1950(Pinneau, , 1955. The chief effort of this review will be directed towards sorting out on an empirical level the varied antecedent conditions of maternal care described in the literature, and relating these empirical conditions to some major theoretical concepts.…”