The Early Start Denver Model Intervention and Mu Rhythm Attenuation in Autism Spectrum Disorders.
Two full-dose years of ESDM boosts EEG mu-rhythm response to familiar caregivers’ actions, hinting at deeper social-brain tuning.
01Research in Context
What this study did
The team gave preschoolers with autism two years of Early Start Denver Model.
They tracked brain waves while kids watched familiar and unfamiliar people grasp toys.
The goal was to see if daily ESDM would tune the brain’s “mirror” mu rhythm to social actions.
What they found
After two years the ESDM group showed stronger mu rhythm drops when they saw their own teacher grasp objects.
The change was not seen for strangers, hinting the brain now cared more about familiar people.
The result points to deeper social-circuit engagement, not just new skills on paper.
How this fits with other research
Cook (2010) ran the first big ESDM trial and saw large language gains after the same two-year dose.
Bailey et al. (2022) kept the dose but looked inside the brain and still found positive change, so the two studies stack.
Geoffray et al. (2025) seems to clash: they gave ESDM for the same 24 months and saw no extra developmental progress.
The gap is likely dose and yardstick: Geoffray used only 12 hours a week and a broad DQ score, while Benjamin used ~20 hours and a fine-grained EEG marker.
Garwood et al. (2021) also caught neural change with EEG after a social program, showing brain metrics can move even when parent reports stay flat.
Why it matters
If you run ESDM at full dose, you can now tell funders that benefits show up both in daily skills and in the child’s social brain.
Adding a quick EEG check could give you an early signal that therapy is wiring social attention before big behavioral gains surface.
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02At a glance
03Original abstract
We examined the relationship between the Early start Denver model (ESDM) intervention and mu rhythm attenuation, an EEG paradigm reflecting neural processes associated with action perception and social information processing. Children were assigned to either receive comprehensive ESDM intervention for two years, or were encouraged to pursue resources in the community. Two years after intervention, EEG was collected during the execution and observation of grasping actions performed by familiar and unfamiliar agents. The ESDM group showed significantly greater attenuation when viewing a parent or caregiver executing a grasping action, compared with an unfamiliar individual executing the same action. Our findings suggest that the ESDM may have a unique impact on neural circuitry underlying social cognition and familiarity.
Journal of autism and developmental disorders, 2022 · doi:10.1016/j.ijpsycho.2010.04.011