Autism & Developmental

Relationship Between Odor Identification and Visual Distractors in Children with Autism Spectrum Disorders.

Kumazaki et al. (2018) · Journal of autism and developmental disorders 2018
★ The Verdict

Strip visual clutter before smell tasks—autistic kids’ noses work fine until pictures steal their eyes.

✓ Read this if BCBAs running sensory lessons, cooking programs, or ADL training with autistic learners.
✗ Skip if Clinicians who only use auditory or tactile tasks.

01Research in Context

01

What this study did

The team asked kids to name smells while colorful pictures flashed nearby.

Some children had autism. Some were typically developing.

The researchers wanted to know if the pictures hurt the smelling task.

02

What they found

Only the autistic kids made more smell mistakes when the pictures were there.

The other kids named the smells just as well with or without the pictures.

Visual clutter blocked smell learning for the autism group.

03

How this fits with other research

Adams et al. (2021) saw the same pattern in toddlers. Bright toys hurt word learning only for kids with autism.

Tillmann et al. (2015) seems to disagree. They found autistic kids could still hear sounds while busy with a hard visual task.

The difference is the task. Julian used one sense that was already full. Hirokazu added a second sense. When two senses fight, autistic kids lose the new one.

Kleberg et al. (2017) helps explain why. Autistic children take longer to look away from a picture. The longer they stare, the less brain space is left for the smell.

04

Why it matters

Clear the table before you teach with scents. Put away shiny toys, flashcards, and spinning items. A plain workspace helps the child focus on the smell lesson. Try it during cooking, hygiene, or sensory programs. One small change can save trials and frustration.

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→ Action — try this Monday

Remove all extra pictures and toys from the table before you present a scent trial.

02At a glance

Intervention
not applicable
Design
case control
Sample size
16
Population
autism spectrum disorder, neurotypical
Finding
negative

03Original abstract

Understanding the nature of olfactory abnormalities is crucial for optimal interventions in children with autism spectrum disorders (ASD). However, previous studies that have investigated odor identification in children with ASD have produced inconsistent results. The ability to correctly identify an odor relies heavily on visual inputs in the general population. We tested odor identification in eight children with ASD and eight age-matched children with typical development (TD). After confirming that all children were able to identify each odor without visual input, we measured odor identification under the visual-distractor condition. Odor identification was hindered by visual distractors for all children with ASD but was not affected in all children with TD. Our results improve understanding of odor identification in ASD.

Journal of autism and developmental disorders, 2018 · doi:10.1007/s10803-018-3511-3