Slowness Therapy for Children with Autism Spectrum Disorder: A Blind Longitudinal Randomized Controlled Study.
Slowing speech and models during therapy lifts imitation and cuts problem behavior in children with autism.
01Research in Context
What this study did
Bruno et al. (2022) ran a year-long, blind, randomized trial.
Kids with autism got either slowed-down speech clips plus normal speech therapy or normal-speed clips plus the same therapy.
Therapists tracked imitation, problem behavior, and eye gaze across monthly visits.
What they found
The slow-input group copied more actions, showed fewer disruptive behaviors, and looked longer at faces.
Gains appeared gradual but kept building across the 12 months.
How this fits with other research
Ferraro (2016) saw no basic reaction-time slowing in autism, yet Bruno’s kids still gained from slowed input. The gap is about task type: Richard timed button presses; Bruno slowed rich social cues.
Gonsiorowski et al. (2016) found toddlers with autism imitate less, but Bruno shows slowed demos can lift imitation later. Age and added supports likely explain the flip.
Vassos et al. (2023) meta-analysis confirms small but real processing-speed lags in autism. Bruno turns that weakness into a strength by giving the brain extra milliseconds to catch up.
Why it matters
You can add slowness to any video, model, or speech clip without new equipment. Try cutting playback speed to 70% during imitation drills or social stories. The extra pause may boost attending, cut problem behavior, and stretch eye contact—all for free.
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02At a glance
03Original abstract
The world often goes too fast for children with autism spectrum disorder (ASD) to process. We tested the therapeutic effectiveness of input slowing in children with ASD. Over 12 months, 12 children with ASD had weekly speech therapy sessions where stimuli were slowly played on a PC, while 11 age- and level-matched children with ASD had speech therapy using real-time stimuli. At the beginning and end of the study, all participants were assessed on communication, imitation, facial emotion recognition, behavior, and face exploration. Whereas communication and facial emotion recognition improved in both groups, imitation increased, inappropriate behaviors decreased, and time spent fixating mouth and eyes increased solely in the group using slowness. Slowness therapy seems very promising for ASD children.
Journal of autism and developmental disorders, 2022 · doi:10.1023/B:JADD.0000029551.56735.3a