264) Chorionic villus sampling can be performed earlier than amniocentesis. A) True B) False 265) In Canada, children with all levels of mental retardation are integrated into regular classrooms, typically with a modified curriculum. A) True B) False 266) Maternal smoking during pregnancy may put some children at increased risk of attention-deficit/hyperactivity disorder. A) True B) False 267) Most cases of mild retardation have a biological cause or causes. A) True B) False 268) Most people with savant syndrome are male. A) True B) False 269) Some people can recall verbatim every story they read in a newspaper. A) True B) False 270) Mainstreaming appears to help most children with mild and moderate retardation achieve their full potential. A) True B) False 271) Adults with mild retardation often work in outside jobs and live in their own apartments. A) True B) False 272) Deinstitutionalization of people with mental retardation has largely resulted in massive social problems and swelled the ranks of America’s homeless population. A) True B) False 273) Children with mental retardation are more likely than other children to be depressed. A) True B) False