Although comorbid or co-occurring psychiatric diagnoses such as attention deficit hyperactivity disorder, anxiety disorders, depression, and oppositional defiant or conduct disorders have been well studied in children or adolescents with autism spectrum disorders (ASDs), very little research is available on preschool samples. The current study…

A study involving 1,097 2-year-olds examined whether the items located on the Child Behavior Checklist/1-5 would provide reasonable indicators of the seven first-order behavioral dimensions purportedly measured by this instrument. Results support the presence of six factors: somatic complaints, withdrawn, attention problems, aggressive behaviors,…

Standardized rating scales are the most often used part of the multidimensional assessment of children's behavior. However, low cross-informant correlations raise concerns about the reliability and validity of the resulting scores. This study examined whether the manner in which behavioral constructs are measured differs across informants, across…