Background: The Developmental Behaviour Checklist (DBC) is an established, internationally used questionnaire for assessing behavioural and emotional problems among young people with developmental or intellectual disabilities (ID). The present study aims to evaluate the psychometric properties of its German teacher version (DBC-T). Method: The…

Introduction: The aim of this study was to adapt the Health of the Nation Outcome Scales for people with Learning Disabilities into French (F-HoNOS-LD) and to examine its validity and reliability. Method: Sixty-six adults with intellectual disabilities (ID) admitted to a psychiatric hospital took part in the study. Clinicians used the F-HoNOS-LD…

A systematic review was completed to identify assessments used with children with intellectual disabilities to assess adaptive behaviour, challenging behaviour and autism-related behaviour and consider their appropriateness for use by special education teachers with autistic pupils. The findings of this review led to the recommendation that the…

Autistic people with intellectual disabilities appear to be at increased risk of schizophrenia. While current recommendations emphasize adapting interventions used for people with schizophrenia in general, few studies to date have investigated treatment of co-occurring schizophrenia in this specific population. To explore what interventions are…

Background: Fragile X syndrome (FXS) is the most common cause of inherited intellectual disability among men. This syndrome is frequently underdiagnosed in adults. The aim of this study was to develop and validate a French translation of the screening checklist "Fragiele-X screeningslijst." Method: The validation sample for the…

Fragile X syndrome (FXS) is characterized by variable neurobehavioral abnormalities, which leads to difficulties in developing and evaluating treatments and in determining accurate prognosis. We employed a pediatric cross-sectional sample (1,072 males, 338 females) from FORWARD, a clinic-based natural history study, to identify behavioral subtypes…

CDKL5 deficiency disorder (CDD) results in early-onset epilepsy and lifelong cognitive and motor impairments. With no validated measure for communication in CDD, this study evaluated the psychometric properties of the Communication and Symbolic Behavior Scales-Developmental Profile Infant Toddler Checklist (CSBS-DP ITC). Caregivers (n = 150;…

Student engagement is recognised as being necessary for students to achieve well academically. Much student engagement research is centred on the perceptions of students via self-assessment or teacher questionnaires. For young students, particularly those with intellectual disability (ID), self-assessment can be problematic due to their…

Introduction: Adults with intellectual disabilities (ID) face a high risk of developing psychiatric disorders, yet there is a lack of valid instruments measuring psychopathology in this population. Two existing instruments are the PAS-ADD Checklist questionnaire and the Mini PAS-ADD interview, two third-party assessments that can be used for the…

The United States has a long, complicated history with sex education as, often, different stakeholders advocate dissimilar educational frameworks (Irvine, 2004). Although controversies remain in defining the boundaries of sex education, there is a movement both nationally and internationally to define sex education comprehensively (Haberland &…

Mental illness, and its assessment and treatment, is a concern for caregivers and professionals working with people with intellectual disability (ID), as well as a cause of distress and disability for people with ID. Research in this area is hindered by difficulties associated with recognizing symptoms of mental illness and tracking their changes.…

Cornelia de Lange syndrome (CdLS) is associated with repetitive and self-injurious behaviors (RBs, SIB). Evaluating children with CdLS, this study: (1) characterizes the spectrum of RBs; (2) characterizes the impact and severity of RBs including SIB; (3) describes how age and adaptive functioning relate to RBs including SIB. Fifty children…

This paper reports on a qualitative, longitudinal case study conducted in England that explored the transition experiences of autistic students with intellectual disabilities (ID) as they left special school to go to colleges of further education (FE). Sequential interviews with six young people, their parents/carers and educators were developed…

In March 2020, many schools were closed to prevent the spread of COVID-19 in Japan, and it is predicted that many children, especially those with neurodevelopmental disorders (NDDs), will be affected emotionally and behaviorally. Here, we examined the impact of school closures due to COVID-19 on school-aged children with NDDs using the Child…

Irritability and aggression (IA) are highly prevalent in individuals with autism spectrum disorder (ASD). Although clinical correlates of IA in this population have been previously examined, findings from existing studies capturing symptoms as a set of latent variables do not fully explain meaningful associations between the symptoms themselves.…