Robert H. Bradley, Bettye M. Caldwell, The Relation of Infants' Home Environments to Mental Test Performance at Fifty-Four Months: A Follow-Up Study, Child Development, Vol. 47, No. 4 (Dec., 1976), pp. 1172-1174
No takes yet. Share an insight, caveat, or question.
Bradley et al. (1976) studied this question.