The specificity of inhibitory impairments in autism and their relation to ADHD-type symptoms.
In autism, only conflict inhibition is reliably shaky, especially when inattention is high.
01Research in Context
What this study did
Sanderson et al. (2013) tested three kinds of inhibition in kids with autism. They used conflict, delay, and distractor tasks.
Each child tried all tasks so the team could see which type, if any, was hard for autism.
What they found
Only conflict inhibition was weaker in the autism group. Delay and distractor scores matched typical peers.
Kids who also had high inattention ratings did the worst on conflict tasks like Stroop.
How this fits with other research
Early et al. (2012) saw the opposite pattern: distractor problems but intact conflict. The two studies look contradictory, yet both used small samples and different tasks. Together they show inhibition in autism is patchy, not global.
Tonizzi et al. (2022) pooled many studies and found a medium conflict deficit across autism. Their meta-average supports the 2013 focus on conflict while smoothing out the task-to-task noise.
Lindor et al. (2019) narrowed the distractor problem to autistic kids with motor issues. That explains why Charlotte et al. saw no broad distractor deficit — most of their sample may have had typical motor skills.
Why it matters
Screen conflict-type tasks when a child with autism shows attention problems, but do not assume every inhibition skill is weak. Use clear pre-cue warnings or reduce Stroop-like competition in instructions. If a kid struggles to ignore side pictures, also check motor skills before you build an intervention plan.
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02At a glance
03Original abstract
Findings on inhibitory control in autism have been inconsistent. This is perhaps a reflection of the different tasks that have been used. Children with autism (CWA) and typically developing controls, matched for verbal and non-verbal mental age, completed three tasks of inhibition, each representing different inhibitory subcomponents: Go/No-Go (delay inhibition), Dog-Pig Stroop (conflict inhibition), and a Flanker task (resistance to distractor inhibition). Behavioural ratings of inattention and hyperactivity/impulsivity were also obtained, as a possible source of heterogeneity in inhibitory ability. CWA were only impaired on the conflict inhibition task, suggesting that inhibitory difficulty is not a core executive deficit in autism. Symptoms of inattention were related to conflict task performance, and thus may be an important predictor of inhibitory heterogeneity.
Journal of autism and developmental disorders, 2013 · doi:10.1007/s10803-012-1650-5