What are conditions that are similar to autism, but not autism?

None with the same: Underlying deficits. Lack of theory of mind impacts the functioning of all people with autism, even those with normal iq's & good languange skills, currently called Asperger syndrome.Toddlers with fetal alcohol spectrum disorders & emerging mood disorders may appear autistic. At a developmental age of 4, a child with intellectual disability can pass the " sally-anne test" if he is not autistic.