Key points are not available for this paper at this time.
Nancy Bayley, Earl S. Schaefer, Correlations of Maternal and Child Behaviors with the Development of Mental Abilities: Data from the Berkeley Growth Study, Monographs of the Society for Research in Child Development, Vol. 29, No. 6, Correlations of Maternal and Child Behaviors with the Development of Mental Abilities: Data from the Berkeley Growth Study (1964), pp. 1+3+5+7-9+11-51+53-71+73-77+79-80
Bayley et al. (Wed,) studied this question.