This systematic review was conducted to identify the literature examining the prevalence of problematic internet use (PIU) in individuals with autism spectrum disorder (ASD), the difference in prevalence of PIU between those with and without ASD, and the correlates of PIU in ASD. Ten studies were identified. The eight studies with comparison…

Introduction: Social knowledge is an important aspect of social cognition that pertains to broader knowledge of social concepts and norms. People with intellectual disabilities are more likely to experience mental health challenges, and it's important to pay special attention to how comorbid conditions can affect their social cognition skills,…

Repetitive and restricted behaviours are a core feature of autism, and cognition in autistic individuals may also be repetitive and restricted. We aimed to investigate the relationship between repetitive behaviours and repetitive thinking. We predicted that autistic people would experience more repetitive, perseverative, visual and negative…

Autistic traits are associated with frequent psychological distress, suicidal ideation, and everyday functional challenges. These associations may be especially prominent in women. Some women with autistic traits "camouflage" feelings of awkwardness in typical social situations by effortfully engaging in expected social behaviors. We…

Objective: Oppositional defiant disorder (ODD) is the most common comorbid condition in childhood ADHD. This trial was prospectively designed to explore ODD symptoms in ADHD adults. Method: A total of 86 patients in this placebo-controlled, double-blind trial of methylphenidate transdermal system (MTS) were categorized based on the presence of ODD…

Objective: To test whether children with attention-deficit/hyperactivity disorder (ADHD), free of conduct disorder (CD) in childhood (mean = 8 years), have elevated risk-taking, accidents, and medical illnesses in adulthood (mean = 41 years); whether development of CD influences risk-taking during adulthood; and whether exposure to…

Background: While associations between conduct disorder (CD), oppositional defiant disorder (ODD), attention deficit hyperactivity disorder (ADHD), and interpersonal callousness (IC) symptoms and delinquency onset are well established, less is known about whether these characteristics differentiate desisting and persisting delinquency. The current…

Conduct disorder (CD) is associated with a number of adverse psychosocial outcomes in adulthood. There is consistent evidence that CD is predictive of antisocial behavior, but mixed evidence that CD is predictive of other externalizing and internalizing disorders. Further, externalizing and internalizing disorders are often associated with similar…

Tourette syndrome is a childhood-onset neuropsychiatric disorder with a high prevalence of attention deficit hyperactivity and obsessive-compulsive disorder co-morbidities. Structural changes have been found in frontal cortex and striatum in children and adolescents. A limited number of morphometric studies in Tourette syndrome persisting into…

We examined whether associations between symptoms of attention-deficit/hyperactivity disorder (ADHD), oppositional defiant disorder (ODD), depression, and anxiety assessed in a sample of 2,026 youth aged 6 to 16 years and socioeconomic functioning measured 18 years later varied as a function of whether parents or teachers had rated symptomatology.…

Objectives: To determine how the experiences of child abuse and parental divorce are related to long-term mental health outcomes using a nationally representative adult sample after adjusting for sociodemographic variables and parental psychopathology. Methods: Data were drawn from the National Comorbidity Survey (NCS, n=5,877; age 15-54 years;…

In obsessive-compulsive disorder (OCD), inflated responsibility (IR) beliefs and thought-action fusion (TAF) are two cognitive schema argued to contribute to obsessions and compulsions. We investigated whether IR and TAF are OCD-specific or whether they occur in other anxiety disorders. Adults diagnosed with OCD (n = 20) or other anxiety disorders…

In high care settings for persons with intellectual disability (ID) aggressive incidents often occur. Still little is known about factors that are associated with an increased risk for aggressive behavior in clients who are admitted to an inpatient treatment facility. In four inpatient facilities, 108 adults with mild and borderline ID and…

Background: Prospective studies show that the adult outcomes of adolescents who deliberately harm themselves are marked by high rates of adversity and psychiatric disorders. The goal of this study was to identify pathways linking childhood risk factors to early adult outcomes of suicidal adolescents. Methods: A clinical sample of 158 adolescents…

Background: Studies of people with intellectual disability suggest that several individual characteristics and environmental factors are associated with behaviour disorder. To date there are few studies looking at risk factors within specific syndromes and the relationship between early risk markers and later behaviour disorder. The key aim of the…