Key points are not available for this paper at this time.
Ann L. Brown, Sandra S. Smiley, Jeanne D. Day, Michael A. R. Townsend, Sallie C. Lawton, Intrusion of a Thematic Idea in Children's Comprehension and Retention of Stories, Child Development, Vol. 48, No. 4 (Dec., 1977), pp. 1454-1466
Brown et al. (Thu,) studied this question.