What automated vocal analysis reveals about the vocal production and language learning environment of young children with autism.
Adults need an extra 150 ms to read autism cries, so teach caregivers to move fast before the window for rich interaction closes.
01Research in Context
What this study did
Researchers played baby cries to the adults. Half the cries came from babies later diagnosed with autism. Half came from typically developing babies.
Adults pressed a key as soon as they knew if the cry sounded "normal" or "not normal." The team timed their answers to the millisecond.
What they found
Adults needed about one extra heartbeat—150 milliseconds—to label the autism cries.
That small delay can stall a parent’s quick check-in. A slower response means fewer chances to soothe and talk to the baby.
How this fits with other research
Laposa et al. (2017) followed baby siblings and found the cries themselves are shorter. Put together: babies with ASD cry in briefer bursts, and adults take longer to read those bursts.
Lortie et al. (2017) showed kids with ASD still detect sounds, but their brains don’t swivel toward voices. The 150 ms adult delay may start this cycle early—baby signals oddly, parent hesitates, interaction dips.
Dube et al. (1991) traced auditory sluggishness to the brainstem. The new study shows the slowdown also shows up in everyday ears—no wires needed.
Why it matters
If parents hesitate even a tenth of a second, comfort and eye-contact moments vanish. You can coach families to respond fast anyway: "Don’t wait to decode the cry—go in, name it, soothe." Add this tip to early-screening packets. A stopwatch and a one-page handout may prime quicker turn-taking from day one.
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02At a glance
03Original abstract
BACKGROUND: The cries of children with Autism Spectrum Disorder (ASD) contain atypical acoustic features. The cries of typically developing infants elicit automatic adult responses, but little is known about how the atypical cries of children with ASD affect the speed with which adults process them. METHOD: We used a reaction time (RT) categorical task to analyze adults' categorization of typically developing cries, atypical (ASD) cries, mammalian animal cries, and environmental noise control sounds. 40 nonparent women (M age = 27 years) were instructed to categorize acoustic stimuli as human infant cries or non-human sounds as quickly as possible. RESULTS: The RTs for correctly categorizing the cries of children with ASD (M = 831ms, SEM = 27) were slower than RTs for typically developing child cries (M = 680ms, SEM = 6) as well as mammalian animal cries (801ms, SEM = 11) and environmental noise control sounds (M = 692ms, SEM = 10). CONCLUSIONS: This difference may reflect difficulties in adults' perceiving and processing atypical cries of children with ASD, and the findings may have implications for the parent-child relationship and for the quality of care children with ASD receive.
Journal of autism and developmental disorders, 2010 · doi:10.1007/s10803-009-0902-5