Evidence concerning the developmental correlates of nonmaternal care in the first year of life are examined with respect to infant-mother attachment and subsequent social development. Even though the evidence is not without its inconsistencies, a circumstantial case, consistent with attachment theory, can be made that extensive infant day care…

Infants who changed in levels of emotionality between three and nine months were compared with infants who remained stable. Maternal personality, marital factors, and mother-infant interaction accounted for the change in highly emotional infants. Father factors accounted for changes by infants who were initially low in negativity. (BC)