The autistic activists say they want help, too, but would be far better off learning to use their autistic strengths to cope with their autistic impairments rather than pretending that either can be removed. Some autistic tics, like repetitive rocking and violent outbursts, they say, could be modulated more easily if an effort were made to understand their underlying message, rather than trying to train them away. Other traits, like difficulty with eye contact, with grasping humor or with breaking from routines, might not require such huge corrective efforts on their part if people were simply more tolerant.

Spurred by an elevated national focus on finding a cure for autism at a time when more Americans are receiving autism diagnoses than ever before -- about one in 200 -- a growing number of autistics are staging what they say amounts to an ad hoc human rights movement. They sell Autistic Liberation Front buttons and circulate petitions on Web sites like neurodiversity.com to "defend the dignity of autistic citizens." The Autistic Advocacy e-mail list, one of dozens that connect like-minded autistics, has attracted nearly 400 members since it started last year.

"We need acceptance about who we are and the way we are," said Joe Mele, 36, who staged a protest at Jones Beach, on Long Island, while 10,000 people marched to raise money for autism research recently. "That means you have to get out of the cure mind-set."

A neurological condition that can render standard forms of communication like tone of voice, facial expression and even spoken language unnatural and difficult to master, autism has traditionally been seen as a shell from which a normal child might one day emerge. But some advocates contend that autism is an integral part of their identities, much more like a skin than a shell, and not one they care to shed.

The effort to cure autism, they say, is not like curing cancer, but like the efforts of a previous age to cure left-handedness. Some worry that in addition to troublesome interventions, the ultimate cure will be a genetic test to prevent autistic children from being born.

That would be a loss, they say, not just for social tolerance but because autistics, with their obsessive attention to detail and eccentric perspective, can provide valuable insight and innovation. The neurologist Oliver Sacks, for instance, contends that Henry Cavendish, the 18th-century chemist who discovered hydrogen, was most likely autistic.

"What they're saying is their goal is to create a world that has no people like us in it," said Jim Sinclair, who did not speak until he was 12 and whose 1993 essay "Don't Mourn for Us" serves as a touchstone for a fledgling movement.