Observed classroom behavior of children with ADHD: relationship to gender and comorbidity

Examined hypothesized gender and comorbidity differences in the observed classroom behavior of children with attention deficit hyperactivity disorder (ADHD). The behavior of 403 boys and 99 girls with ADHD, ages 7–10, was compared (a) to observed, sex-specific classroom behavior norms, (b) by sex, and (c) by comorbid subgroups. Boys and girls with ADHD deviated significantly from classroom norms on 15/16 and 13/16 categories, respectively. Compared to comparison girls, girls with ADHD had relatively high rates of verbal aggression to children. Boys with ADHD engaged in more rule-breaking and externalizing behaviors than did girls with ADHD, but the sexes did not differ on more neutral, unobtrusive behaviors. The sex differences are consistent with notions of why girls with ADHD are identified and referred later than boys. Contrary to hypothesis, the presence of comorbid anxiety disorder (ANX) was not associated with behavioral suppression; yet, as hypothesized, children with a comorbid disruptive behavior disorder (DBD) had higher rates of rule-breaking, and impulsive and aggressive behavior, than did children with ADHD alone and those with ADHD+ANX. Elevated rates of ADHD behaviors were also observed in children with comorbid DBD, indicating that these behaviors are truly present and suggesting that reports of higher ADHD ratings in this subgroup are not simply a consequence of negative halo effects and rater biases.     

Finite Mixtures of Hidden Markov Models for Longitudinal Responses Subject to Drop out

Abstract

Drop out is a typical issue in longitudinal studies. When the missingness is non-ignorable, inference based on the observed data only may be biased. This paper is motivated by the Leiden 85+ study, a longitudinal study conducted to analyze the dynamics of cognitive functioning in the elderly. We account for dependence between longitudinal responses from the same subject using time-varying random effects associated with a heterogeneous hidden Markov chain. As several participants in the study drop out prematurely, we introduce a further random effect model to describe the missing data mechanism. The potential dependence between the random effects in the two equations (and, therefore, between the two processes) is introduced through a joint distribution specified via a latent structure approach. The application of the proposal to data from the Leiden 85+ study shows its effectiveness in modeling heterogeneous longitudinal patterns, possibly influenced by the missing data process. Results from a sensitivity analysis show the robustness of the estimates with respect to misspecification of the missing data mechanism. A simulation study provides evidence for the reliability of the inferential conclusions drawn from the analysis of the Leiden 85+ data.     

UN Convention on the Rights of the Child and Global Childhoods: Transdisciplinary Reflections from Nepal

Abstract

Globally, humans face innumerable socioeconomic, cultural, and environmental problems while being threatened by ever more interconnected and complex geopolitical concerns. In this planetary context, unidisciplinary research and related teaching approaches often work to constrain our ability to move beyond institutional and bureaucratic mind-sets to become agents of social change within local systems impacting children. During its 40-year evolution from a sub-discipline of psychology, the international field of child and youth studies has sought common ground for interpreting these pedagogical and professional issues. Many authors now argue for transdisciplinary approaches to address and overcome these tensions in the effort to re-integrate epistemologies of the global South within more dominant global North knowledge production systems. Such approaches have been posited to add new analytical and methodological tools to achieve praxis—the Greek word for translating theory into practice. Transdisciplinary research transcends the usual gap between academia and the broader public by acknowledging the value of knowledge obtained from diverse, nonacademic stakeholders in the community, government, and business. In addition, these approaches in child and youth studies offer us new possibilities for translating and understanding the local and global implications of implementing the 1989 United Nations Convention on the Rights of Child, and the vast differences in the experiences of childhood amongst and between various socioeconomic, cultural, and political contexts in recognizing their own rights in situ. Moving beyond adult-focused and Eurocentric understanding of the childhood literature (and of children’s human rights), this paper reflects our experiences working with young people affiliated with the Lalitpur Metropolitan City Child Clubs in Nepal, and observing their participatory planning processes for annual budgets. In response to increasing complexity throughout all regions of the world, we consider historical, political, and cultural experiences in Nepal through this transdisciplinary approach to child-centered research and activism. Our paper details key learning and transitions from being “academic researchers” and “observers” of a participatory, child- and youth-focused budgeting process to “collaborators” and “co-constructors of knowledge” with key stakeholders—the young people of Lalitpur, Nepal.