Key points are not available for this paper at this time.
Marilyn Shatz, Rochel Gelman, The Development of Communication Skills: Modifications in the Speech of Young Children as a Function of Listener, Monographs of the Society for Research in Child Development, Vol. 38, No. 5, The Development of Communication Skills: Modifications in the Speech of Young Children as a Function of Listener (Oct., 1973), pp. 1-38
Shatz et al. (Mon,) studied this question.