Background Children with intellectual disability are at heightened risk for behaviour problems and diagnosed mental disorder. Methods The present authors studied the early manifestation and continuity of problem behaviours in  pre-school children with and without developmental delays. Results Behaviour problems were quite stable over the year from age  - months. Children with developmental delays were rated higher on behaviour problems than their non-delayed peers, and were three times as likely to score in the clinical range. Mothers and fathers showed high agreement in their rating of child problems, especially in the delayed group. Parenting stress was also higher in the delayed group, but was related to the extent of behaviour problems rather than to the child's developmental delay. Conclusions Over time, a transactional model fit the relationship between parenting stress and behaviour problems: high parenting stress contributed to a

Background The COVID‐19 pandemic introduced challenges to families with young children with developmental delays. Beyond the widespread concerns surrounding illness, loss of employment and social isolation, caregivers are responsible for overseeing their children's educational and therapeutic programmes at home often without the much needed support of professionals. Method The present study sought to examine the impact of COVID‐19 in 77 ethnically, linguistically and socioeconomically diverse families with young children with intellectual and developmental disabilities (IDDs) in California and Oregon, who were participating in larger intervention studies. Parents responded to five interview questions about the impact of the pandemic, services for their child, silver linings or positive aspects, coping and their concerns about the long‐term impact of the pandemic. Results Parents reported that their biggest challenge was being at home caring for their children with the loss of many essential services. Parents reported some positive aspects of the pandemic, especially being together as a family. Although there were positive aspects of the situation, many parents expressed concern about long‐term impacts of the pandemic on their children's development, given the loss of services, education and social engagement opportunities. Conclusion Results suggest that parents of young children with IDD report significant challenges at home during the pandemic. Professional support, especially during the reopening phases, will be critical to support family well‐being and child developmental outcomes.

Caregivers of young adults with autism report more maladaptive behaviour problems and lower personal well-being, or stress, relative to other diagnostic groups, regardless of cultural group. However, cultural differences exist in caregiver reports of depression, morale, and positive perceptions. Implications for service provision aimed at families of children with challenging behaviour problems are discussed in the context of culture.

Children with ID had less positive early school experiences, as indicated by multiple indices of adaptation to school. Fostering early social skills may be an important target for increasing the positive adaptation to school for young children, especially those with ID.