Children with autism often exhibit very subtle and very mild behaviors before full blown symptoms develop. One way to study these early signs and symptoms is to follow infants at high risk for an ASD diagnosis and carefully monitor their development in a number of domains. One of these is domains is speech. There can be very, very small differences in early vocalizations that persist to when babies can start forming vowels. The difference in the way infants with ASD pronounce vowels may not be able to be heard by the human ear, but it can be distinguished using other methods. Ms. Chenausky will take already collected data in a high risk infant development study and use this new funding to collaborate with experts in acoustics and speech to study very early differences in vowel production. While these early and specific changes in speech may not problematic on their own, without speech therapy, they may lead to larger speech and language deficits. Therefore, these findings may lead to a way to detect changes leading to earlier intervention and better outcomes for those at risk for ASD.