Background: The sociocommunicative problems in autism spectrum disorder (ASD) are traditionally linked to impairments in Theory of Mind (ToM), the ability to ascribe mental states to others. Although ToM impairments are consistently reported in young children with ASD, findings on more advanced ToM understanding in older individuals with…

Objective: The societal changes experienced by Western societies in recent decades have raised concerns about increases in the level of children's mental health problems. Although studies of secular changes in the prevalence of psychiatric diagnoses have indeed shown increases, their results may have been influenced by methodological problems,…

Objective: To determine the extent to which the Youth Self-Report (YSR) can be used to assess emotional and behavioral problems in adolescents with intellectual disabilities (IDs). Method: In 2003, 281 11- to 18-year-olds with IDs (IQ greater than or equal to 48) completed the YSR in an interview, and in 1993, 1,047 non-ID adolescents completed…

Objective: To compare the predictive validity of the clinical-diagnostic and the empirical-quantitative approach to assessment of childhood psychopathology, and to investigate the usefulness of combining both approaches. Method: A referred sample (N = 96), aged 6 to 12 years at initial assessment, was followed up across--on average--a period of…