“…Because of the problem of co-occurrence of comorbidity of symptoms, it is normal for a child who exhibits symptoms of depression to also exhibit some symptoms of anxiety, social withdrawal, somatic complaints, and vice-versa. Also, recent research has indicated that various expressions of affectivity (i.e., positive affect and negative affect) may keenly impact the expression of internalizing disorders of children and may be a key to differentiating depression from anxiety in cases where such differentiation is possible (e.g., Carey, Finch, & Carey, 1991;Jolly, Dyck, Kramer, & Wherry, 1994;Stark, Kaslow, & Laurent, 1993;Tellegen, 1986;Watson & Clark, 1984). The unique broad-band internalizing symptom construction of the ISSC, coupled with its affect-based factor structure, are consistent with these recent developments in child psychopathology research.…”