This study used the correlated trait-correlated method minus one model to examine the convergent and discriminant validity of the Child Behavior Checklist (CBCL), Teacher's Report Form (TRF) and Youth Self-Report (YSR), based on ratings of clinic-referred adolescents. A total of 294 adolescents, comprising 70.5 % males, provided self-ratings on the YSR. The adolescents were also rated by their mothers and teachers on the CBCL and TRF respectively. The findings indicated some support for convergent validity for the CBCL and TRF for Anxious/Depressed, Withdrawn/Depressed and Rule Breaking Behavior, and for the convergent validity for the CBCL and YSR for Rule Breaking Behavior. There was support for the discriminant validity between virtually all the traits. The findings are discussed in relation to the construct validity, cross-informant agreement, and clinical use of the CBCL, TRF and YSR.

The findings support the validity of the bifactor model.

The current study used latent profile analysis (LPA) to ascertain distinct groups of children with ADHD (N = 701) in terms of performance on working memory (WM) tasks that tapped visuospatial sketchpad, spatial central executive, and verbal central executive functions. It compared the WM performances of these classes with a clinical comparison group (N = 59). The participants' age ranged from 7 to 16 years (586 males, 71 females). The results of the LPA supported three classes. For all three WM tasks, class 1 (N = 196) had more difficulties than classes 2 (N = 394) and 3 (N = 111), and the clinical comparison group. Class 2 had more difficulties than class 3 and the clinical comparison group, and there was no difference between class 3 and the clinical comparison group. Class 1 had lower IQ and academic abilities, and relatively more individuals with depressive disorders. The implications of the findings for understanding ADHD and its treatment are discussed.

The current study used confirmatory factor analysis (CFA) to examine the factor structure of anxiety and depressive disorders in a sample of clinic-referred adolescents, aged between 12 and 18 years, for diagnoses based on parent (N = 655; male = 441) and adolescent (N = 626; male = 417) interviews. Three models were examined: a 1-factor model, with all anxiety and depressive disorders in a single factor; a DSM-based 2-factor model, with anxiety disorders in one factor, and depressive disorders in another factor; and an alternate 2-factor model, with fear related anxiety disorders in one factor, and other anxiety and depressive disorders in another factor. The findings indicated support for all three models. Also, ADHD and ODD/CD were associated with only the shared variances between the latent factors in the 2-factor models, and not their unique variance. The implications of the findings for taxonomy, comorbidity, and clinical practice are discussed.