A rare condition marked by a sudden and profound loss of skills is biologically distinct from other forms of autism.
Spectrum: Autism Research News
Children missing a stretch of DNA on chromosome 16 show worsening motor and social skills in the first eight years of life; those with an extra copy of the region do not show this decline.
Children with autism inherit a greater burden of common genetic variants associated with autism than would be expected by chance. These variants combine with rare, spontaneous mutations to boost autism risk.
Between the ages of 2 and 8, intelligence increases in half of children with autism. In some of these children, intellectual disability gives way to average intelligence.
The idea that one residential model is appropriate for the entire spectrum of intellectual and developmental disability is patently absurd.
A minority of boys with autism have brains that are unusually large relative to their bodies — a trait tied to regression and intellectual disability.
A picture-based test is a fast and flexible way to assess intelligence in large studies of people with autism.
Girls who show severe emotional or behavioral problems are more likely to be diagnosed with autism than those who do not.
A combination of multiple diagnostic tests may gauge the extent to which adults with autism attempt to blend in.