Enhanced access to early visual processing of perceptual simultaneity in autism spectrum disorders.
Clients with autism can detect split-second visual timing differences better than neurotypical peers—so keep your visual cues crisp.
01Research in Context
What this study did
The team asked adults with autism and neurotypical adults to watch pairs of simple shapes.
One shape flashed 17 milliseconds before the other. Participants said whether the flashes looked simultaneous.
Brain sensors (MEG) tracked early visual activity while they judged.
What they found
Adults with autism spotted the 17 ms gap more often than controls.
Their early occipital brain waves were also stronger, showing faster first-stage visual processing.
How this fits with other research
Kopec et al. (2020) repeated the result in children using color targets at 39–65 ms, proving the edge survives across ages and tasks.
De Meo-Monteil et al. (2019) moved from perception to action: adults with autism also outperformed controls when tapping in time with a flashing dot, showing the timing strength carries into motor skills.
Shirama et al. (2017) extended the finding to cluttered screens. Even when masks blocked serial search, adults with autism still found targets faster, hinting that the early visual boost helps in busy real-world scenes.
Why it matters
Your client may notice tiny visual lags you cannot see. Use ultra-sharp timing in visual cues—flash cards, video models, or AAC icons—because their brains already track these gaps. Avoid sloppy lip-sync or flickering lights that could distract instead of teach.
Want CEUs on This Topic?
The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.
Join Free →Check that your visual prompts, timers, and tablet apps update at 60 fps with no dropped frames—your client will notice even 17 ms stutter.
02At a glance
03Original abstract
We compared judgements of the simultaneity or asynchrony of visual stimuli in individuals with autism spectrum disorders (ASD) and typically-developing controls using Magnetoencephalography (MEG). Two vertical bars were presented simultaneously or non-simultaneously with two different stimulus onset delays. Participants with ASD distinguished significantly better between real simultaneity (0 ms delay between two stimuli) and apparent simultaneity (17 ms delay between two stimuli) than controls. In line with the increased sensitivity, event-related MEG activity showed increased differential responses for simultaneity versus apparent simultaneity. The strongest evoked potentials, observed over occipital cortices at about 130 ms, were correlated with performance differences in the ASD group only. Superior access to early visual brain processes in ASD might underlie increased resolution of visual events in perception.
Journal of autism and developmental disorders, 2013 · doi:10.1007/s10803-012-1735-1