Acoustic Differences In The Imitation Of Prosodic Patterns In Children With Autism Spectrum Disorders.

Diehl et al. (2012) asked kids and teens with autism to copy the rise and fall of a speaker's voice. They also tested typically-developing peers doing the same task.

The team used computers to measure how long each child took to say the copied sentence. They looked for tiny timing gaps that show motor planning trouble.

Children with autism took longer to finish the copied sentences. Their speech also sounded flatter and less like the model.

The longer times point to motor planning problems, not just social issues.

Kissine et al. (2019) seems to disagree. They found adults with autism held vowels more steadily than typical adults. The gap is about task: holding one vowel is simple, but copying a whole prosody pattern is hard.

Lau et al. (2023) and Taylor et al. (2017) extend the story. They show timing issues also live inside single consonants and emotional speech. The trouble spreads across many speech levels.

McDuffie et al. (2007) set the stage by showing different imitation types in toddlers. John’s team moved the lens to voice imitation in older kids.

If a child speaks slowly or sounds flat, it may be a motor issue, not lack of interest. Break prosody targets into short chunks. Give extra wait time and model again. Reward close matches to help the motor plan stick.