Assessment & Research

QEEG spectral and coherence assessment of autistic children in three different experimental conditions.

Machado et al. (2015) · Journal of autism and developmental disorders 2015
★ The Verdict

Autistic children’s EEG patterns shift when cartoon sound is added, giving an easy window into sensory integration problems.

✓ Read this if BCBAs who assess sensory or language issues in clinic or school.
✗ Skip if Practitioners looking for ready-made intervention protocols; this is assessment only.

01Research in Context

01

What this study did

Researchers wired autistic kids to EEG caps while they watched cartoons.

One round had sound on, another had sound off.

They compared brain waves across the two rounds to see how adding audio changed neural traffic.

02

What they found

When the sound came on, power and coherence shifted in specific brain spots.

The pattern looked like the children’s brains struggled to fuse the picture with the new sound.

Authors call this a sign of weak sensory integration.

03

How this fits with other research

Wang et al. (2025) used the same cartoon setup but added machine-learning to read semantic processing. They found clear ASD signatures, proving the cartoon EEG idea still works when you dig deeper.

Taylor et al. (2010) and Feng et al. (2021) both saw weaker multisensory fusion in autism with different tasks. Calixto’s EEG shifts line up with their behavioral drops, giving a brain trace for what they measured.

Hua et al. (2024) meta-analysis shows autistic youth under-activate temporal areas during auditory language. Calixto’s coherence changes in similar zones suggest the cartoon task taps the same weak auditory network, just in a calmer, non-language context.

04

Why it matters

You now have a cheap, five-minute EEG marker that surfaces sensory trouble while a child simply watches a cartoon.

Use it to screen new clients, check if audio supports help, or show parents why their child covers his ears when the TV is on.

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Try a quick A-B listening check: mute and un-mute a short cartoon clip while watching for covering ears, gaze shift, or agitation to spot kids who may need auditory supports.

02At a glance

Intervention
not applicable
Design
other
Population
autism spectrum disorder
Finding
not reported

03Original abstract

We studied autistics by quantitative EEG spectral and coherence analysis during three experimental conditions: basal, watching a cartoon with audio (V-A), and with muted audio band (VwA). Significant reductions were found for the absolute power spectral density (PSD) in the central region for delta and theta, and in the posterior region for sigma and beta bands, lateralized to the right hemisphere. When comparing VwA versus the V-A in the midline regions, we found significant decrements of absolute PSD for delta, theta and alpha, and increments for the beta and gamma bands. In autistics, VwA versus V-A tended to show lower coherence values in the right hemisphere. An impairment of visual and auditory sensory integration in autistics might explain our results.

Journal of autism and developmental disorders, 2015 · doi:10.1002/ajmg.c.31328