Objective: Autism spectrum disorders are considered to be among the most heritable mental
disorders, a notion based on surprisingly sparse data from small clinical studies. Population …

Background Evidence from twin and molecular genetic studies is accumulating that Autism
Spectrum Disorder (ASD) shares substantial etiological factors with other disorders. This is …

OBJECTIVE: This study investigated the etiology of autistic-like traits in the general
population and the etiological overlap between the three aspects of the triad of impairments …

Genetic epidemiological studies of Autism Spectrum Disorders (ASDs) based on twin pairs
ascertained from the population and thoroughly assessed to obtain a high degree of …

Autism spectrum disorders (ASD) are among the most heritable of all neuropsychiatric
disorders. Discovery of autism susceptibility genes has been the focus of intense research …

Background Although neurodevelopmental disorders are demarcated as discrete entities in
the Diagnostic Statistical Manual of mental disorders, empirical evidence indicates that there …

Unlike such psychiatric disorders as depression, schizo- symptoms such as aggression,
anxiety, and obsessivecompulsive behaviors but little or no inprovement in phrenia, and …

Researchers continue to pursue a better understanding of the symptoms, comorbidities, and
causes of autism spectrum disorders. In this article we review more than 30 twin studies of …

This study aimed to identify empirically the number of factors underlying autism symptoms—
social impairments, communication impairments, and restricted repetitive behaviors and …

Background The etiology of Autism Spectrum Disorder (ASD) has been recently debated
due to emerging findings on the importance of shared environmental influences. However …