“…Countless studies have documented the impaired language and intellect and disturbed behavior that characterize such children and limit their adult functioning (Bakwin, 1942;Dennis, 1973;Goldfarb, 1945Goldfarb, , 1955Pringle & Bossio, 1960;Provence & Lipton, 1962;Spitz, 1946; see reviews by Ainsworth, 1962;Bowlby, 1951;Ferguson, 1966;Rutter, 1974;Yarrow, 1961). Children growing up in orphanages and residential institutions compose a natural experiment that can offer important information about the effects of child care.…”