Inherent in the structured diagnostic interviewing of children is the problem of how to resolve differences between the child's own report and that of the parent about the child. A related problem concerns the use of outside source of information about the child, such as information from the teacher. In this study, the authors review the decision-making process used in the assignment of summary psychiatric diagnoses based on the child and parent reports, as well as a number of other sources of information about the child. Provisional rules for making summary diagnoses of children are presented.