Key points are not available for this paper at this time.
Craig Edelbrock, Anthony J. Costello, Mina K. Dulcan, Robert Kalas, Noelle Calabro Conover, Age Differences in the Reliability of the Psychiatric Interview of the Child, Child Development, Vol. 56, No. 1 (Feb., 1985), pp. 265-275
Edelbrock et al. (Fri,) studied this question.