Autism & Developmental

The Effect of Attention on Auditory Processing in Adults on the Autism Spectrum.

Crasta et al. (2024) · Journal of autism and developmental disorders 2024
★ The Verdict

Autistic adults' brains take longer to register sounds and sync less well, and these neural delays track with their everyday sensory and social difficulties.

✓ Read this if BCBAs working with autistic teens or adults who struggle with auditory processing or following verbal instructions
✗ Skip if Practitioners focused solely on motor skills or visual-based interventions

01Research in Context

01

What this study did

Adams et al. (2024) hooked up autistic and neurotypical adults to EEG caps. They played simple tones while the adults sat quietly.

The team measured two brain waves: the N1 response that marks early sound detection and gamma waves that show how neurons sync up.

02

What they found

Autistic adults' N1 peaks arrived later and their gamma power was weaker than controls. The more their brain responses differed, the more sensory and social challenges they reported in daily life.

The pattern held across the whole autistic group - no one had

03

How this fits with other research

Liu (2025) found the same negative direction using a nearly identical setup. Their autistic adults also showed reduced attention-dependent brain responses, making this a clean conceptual replication.

Panganiban et al. (2025) extended the finding downward to kids. They showed that reduced P300 brain responses in autistic 7-14-year-olds link to slower processing and daily living difficulties - the same real-world connection E et al. found in adults.

Nijs et al. (2016) foreshadowed this work by showing autistic adults had heightened bottom-up sound processing but reduced top-down control. E et al.'s delayed N1 fits right into that earlier pattern of atypical auditory attention circuits.

04

Why it matters

When an autistic client seems to miss or mis-time spoken instructions, the issue might be neural, not behavioral. These EEG studies show measurable lags in basic sound detection that correlate with real-world sensory and social challenges. Consider adding visual supports, written cues, or extra processing time to your sessions - the client's brain literally needs more milliseconds to register what they heard.

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02At a glance

Intervention
not applicable
Design
quasi experimental
Sample size
48
Population
autism spectrum disorder, neurotypical
Finding
negative

03Original abstract

This study examined the effect of attention on auditory processing in autistic individuals. Electroencephalography data were recorded during two attention conditions (passive and active) from 24 autistic adults and 24 neurotypical controls, ages 17-30 years. The passive condition involved only listening to the clicks and the active condition involved a button press following single clicks in a modified paired-click paradigm. Participants completed the Adolescent/Adult Sensory Profile and the Social Responsiveness Scale 2. The autistic group showed delayed N1 latencies and reduced evoked and phase-locked gamma power compared to neurotypical peers across both clicks and conditions. Longer N1 latencies and reduced gamma synchronization predicted greater social and sensory symptoms. Directing attention to auditory stimuli may be associated with more typical neural auditory processing in autism.

Journal of autism and developmental disorders, 2024 · doi:10.1037/a0018265