are consistent with the suggested mood diagnosis. Further research will be required to identify whether the correlates and outcomes of TDD differ from the current specification of ODD and to identify the clinical characteristics of children with ODD who do not meet the TDD criteria. A growing body of evidence also indicates that callous and unemotional traits may usefully sub-type CD (Frick & White, 2008; Rowe et al., 2010). It is unclear whether similar sub-typing may be useful for ODD as well.