Research into causes has been hampered by the inability to identify biologically meaningful subgroups within the autistic population and by the traditional boundaries between the disciplines of psychiatry, psychology, neurology and pediatrics.
A investigación das causas do autismo viuse dificultada pola incapacidade de identificar subgrupos bioloxicamente significativos dentro da poboación autista e polos límites tradicionais entre as disciplinas da psiquiatría, psicoloxía, neuroloxía e pediatría.