... by reviewing the history and current status of the relationship between autism and schizophrenia. A general review was conducted using a chronological approach that focused on phenomenology, aetiology, genetic mechanisms and treatment. Findings – Persons with autism are far more rigid, have difficulties...

.... Design/methodology/approach – This paper reviews quantitative genetic findings in ADHD, primarily focussing on twin studies that describe the role of genetic influences throughout the lifespan and the associated overlap between ADHD and other syndromes, disorders and traits. Findings – This paper...