Answer: The sum of ratings on all the problem items is analogous to the general intelligence dimension (g factor) found in analyses of the items and scales of intelligence tests. The items comprising all the syndrome, DSM-oriented, Internalizing, and Externalizing scales are included in the Total Problems score, which is typically among the strongest discriminators between children referred for mental health services and demographically similar non-referred peers (Achenbach & Rescorla, 2001). The Total Problems score thus provides an efficient basis for grouping societies according to informants’ ratings of the broad spectrum of problems assessed by the CBCL, TRF, and YSR.