Can watching television cause autism?

"Today, Cornell University researchers are reporting what appears to be a statistically significant relationship between autism rates and television watching by children under the age of 3. The researchers studied autism incidence in California, Oregon, Pennsylvania, and Washington state. They found that as cable television became common in California and Pennsylvania beginning around 1980, childhood autism rose more in the counties that had cable than in the counties that did not. They further found that in all the Western states, the more time toddlers spent in front of the television, the more likely they were to exhibit symptoms of autism disorders...

So Waldman studied precipitation records for California, Oregon, and Washington state, which, because of climate and geography, experience big swings in precipitation levels both year-by-year and county-by-county. He found what appears to be a dramatic relationship between television viewing and autism onset. In counties or years when rain and snow were unusually high, and hence it is assumed children spent a lot of time watching television, autism rates shot up; in places or years of low precipitation, autism rates were low...

Research has shown that autistic children exhibit abnormal activity in the visual-processing areas of their brains, and these areas are actively developing in the first three years of life...

If television viewing by toddlers is a factor in autism, the parents of afflicted children should not reproach themselves, as there was no warning of this risk. Now there is: The American Academy of Pediatrics currently recommends against any TV for children under the age of 2. Waldman thinks that until more is known about what triggers autism, families with children under the age of 3 should get them away from the television and keep them away.

Researchers might also turn new attention to study of the Amish. Autism is rare in Amish society, and the standing assumption has been that this is because most Amish refuse to vaccinate children. The Amish also do not watch television."

[Note: correlation is not the same as causation; this is discussed at the Slate article from which the above text was excerpted. Even though I'm no fan of television, I'm not taking a position on any role it might have re autism - just offering this information as food for thought.]