Restricted interests and repetitive behaviors (RRBs) are core symptoms of autism spectrum disorder (ASD), and commonly occur in attention-deficit/hyperactivity disorder (ADHD). Little is known about how RRBs manifest in ADHD. We quantified and compared factor structures of RRBs in children with ASD (n = 634) or ADHD (n = 448), and related factors…

3q29 deletion syndrome (3q29del) is associated with neuropsychiatric and neurodevelopmental phenotypes. We previously reported that graphomotor weakness is present in up to 78% of individuals with 3q29del. We have now explored nuances of the graphomotor phenotype and its association with other comorbidities in this population. Participants were…

This study is a conceptual replication of a widely cited study by Moffitt et al. (2011) which found that attention and behavior problems in childhood (a composite of impulsive hyperactive, inattentive, and impulsive-aggressive behaviors labeled "self-control") predicted adult financial status, health, and criminal activity. Using data…

Some of the worst long-term outcomes of children are associated with the presence of both externalizing behavior and low academic achievement. Additionally, trajectories of externalizing problem behavior have shown that when children enter kindergarten with problem behavior, it tends to persist and is often associated with low academic…

Children with complex behavioral profiles (e.g., ASD + ADHD) may experience delays in obtaining a final diagnosis. Low-resource or underrepresented groups may be at even greater risk for delayed diagnosis. We assessed the effect of sociodemographic factors, symptom complexity and co-occurring conditions, and identifier of first symptoms on…

This study investigated the relationship between mathematics difficulties and psychopathology in a large community sample (N = 881) of youth (8-18 years of age) in the United States. The primary aims of the study were to (a) test the associations between mathematics difficulties and specific components of internalizing, externalizing, attention,…

Poor reading has been linked to negative outcomes on a wide range of emotional-behavioural dimensions in children. However, little is known about the time course of these associations. In this study we analyse data from a sample of Finnish children (N = 199; 106 boys) which included measures of reading fluency in grade 1 (age 7 or 8), and…

Children who exhibit inattention (IA) and hyperactivity-impulsivity (HI), symptoms often indicative of attention-deficit/hyperactivity disorder (ADHD), have notable social impairments. We investigated whether IA and HI are directly connected to peer difficulties or indirectly connected through their known association with other problem behaviors.…

Background: Integrated primary care (IPC) can address prevalent behavioral health concerns identified in pediatric office visits, but research on IPC consultation patterns is limited. Objective: This study investigated variation in consultation rates across presenting problems, patient sociodemographic factors, and IPC treatment duration. Method:…

The unique residential context found within boarding schools may have important implications for students' perceptions of school climate and, in turn, may impact their social-emotional well-being. However, there is limited research on the relations between school climate and boarding students social-emotional well-being. This study intended to…

With the research reported on here we sought to determine whether children with attention-deficit/hyperactivity disorder (ADHD) displayed more symptoms of oppositional defiant disorder (ODD), conduct disorder (CD) and anger, which are categorised as externalising disorders, when contrasted to the control group and, also, whether gender and age…

School disruption (SD) places students at risk of early school departure and other negative psychological outcomes. Based on the data derived from a sample of Ontario children and youth, this study aims to identify risk factors associated with SD among 1,241 school-aged students. A logistic regression model revealed that substance use, family…

Objective: Children with ADHD often experience functional impairments across various aspects of daily life. This study addresses the dearth of longitudinal research on functional impairment trajectories from preschool to school age in children with symptoms of ADHD and comorbid disorders. Methods: We investigated the extent to which functional…

The purpose of this study was to identify predictors of friendship quality in adolescents with and without ADHD. The participants were 115 adolescents (61 ADHD, 54 non-ADHD), ages 13-18. The adolescents completed questionnaires assessing the quality of their relationships with their best friends, social perspective taking, anxiety and depression.…

Observed frequently within higher education settings, student incivility need to be dealt with since they affect teaching-learning process adversely. The aim of this study is to determine the frequency of student incivility in higher education and coping techniques employed by academics. Both qualitative and quantitative data were collected…