Doctors should use biology, not only behavior, to evaluate children

From Forbes:

Autism’s sharp rise is, in large part, a matter of definitions. Is a child with severe learning problems autistic? What about a child who is insensitive in social situations? What about children who have trouble communicating or seem to retreat into their own shells? These days a large number of children who fit any of those descriptions are likely to be tagged with the autism label, or their parents will be told that they have a disorder (like Asperger’s syndrome) that falls somewhere in the autism spectrum.

This looseness of definition is getting in the way of medical progress.