four-year-old susan has just been diagnosed with autism. research suggests that her chances of never developing speech proficiency sufficient to communicate her needs are about percent.

The answer is about 25 percent.

Autism refers to a range of conditions characterized by different kinds of challenges. We know that there is not one autism but many types caused by different combinations of genetic and environmental influences. Around 1/3 of people diagnosed with autism remain non-verbal and have an intellectual disability.

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