Understanding early communication signals in autism: a study of the perception of infants' cry.
Autism infants produce higher-pitched cries that adults find hard to ignore, so treat the sound as an early communication tool.
01Research in Context
What this study did
Sharp et al. (2010) played baby cries for adults.
Some cries came from babies later diagnosed with autism. Others came from typically developing babies.
Adults rated how unpleasant each cry sounded.
What they found
Cries from autism babies sounded more aversive.
The pitch was higher and the tone quality differed.
Adults reacted faster and wanted to stop the sound sooner.
How this fits with other research
Michel et al. (2024) asked adults with autism to rate voices. They also found vocal sounds less pleasant, extending the cry result to older ages.
Rosenthal et al. (1980) measured heart rate and skin response in autistic kids listening to sounds. They saw weaker body reactions, seeming to clash with the new finding that cries grab adult attention. The gap makes sense: babies send urgent signals while older kids dampen their own response.
Dwyer et al. (2023) tracked toddler brain waves during repeated tones. Autistic toddlers showed slower neural habituation, matching the idea that their sounds stay intense to listeners.
Why it matters
You now know that an autism infant’s cry is not just louder—it is acoustically tuned to pull adult care. Use this insight when coaching parents. Tell them the cry is a signal, not defiance. Teach them to respond quickly and calmly. Quick response lowers family stress and builds trust.
Want CEUs on This Topic?
The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.
Join Free →Record a client’s cry for one minute and share the clip with parents while pointing out the unique pitch—then practice soothing responses together.
02At a glance
03Original abstract
BACKGROUND: Previous studies have highlighted that episodes of crying of children with autistic disorder (AD) were perceived as inexplicable from their parents who could not identify causative factors. These results supported the view of AD as related to a problem of expressing and sharing emotions. Moreover, no evidence has been presented on which characteristics of a cry episode influence the adult perception. Aim of our research is to investigate how acoustical features of crying episodes modulate their perception of infants with ASD compared with infants with typical development (TD) and infants with developmental delay (DD). METHODS: Two studies were employed. In study 1, we artificially modified structural parameters (fundamental frequency, duration of the pauses, waveform modulation) of a cry episode, and then 50 adults (parents and non-parents) were asked to judge the level of distress elicited. In study 2, acoustic analysis was applied to episodes of crying selected from retrospective home videos of 42 children with AD, TD and DD at 18 months. RESULTS: The results showed that (1) differences in the fundamental frequency and in other structural parameters of the cry lead parents and non-parents to perceive an episode of crying as more aversive and (2) at 18 months of age, AD episodes of crying have higher fundamental frequency (f0). CONCLUSION: Our findings offer support for the hypothesis that acoustic characteristics of episodes of crying of children with autism, especially higher fundamental frequencies, may account for mental states of uneasiness in the listener.
Journal of intellectual disability research : JIDR, 2010 · doi:10.1111/j.1365-2788.2010.01252.x