The Unique Roles of Executive Function in Co-Occurring Psychopathologies in Autism.
Shing-Him Ng, Jet Leung, Keith Chun Lok Lee and 11 others
Among 701 children with autism, weaker attention, working memory, and self-control predicted more severe ADHD.
Better executive function also softened the link between being overwhelmed by sensory input and anxiety. A pattern no other cognitive domain showed.
Key findings
1Executive function (attention, working memory, inhibition) predicted clinician-diagnosed ADHD status in a dose-dependent manner: for each standard-deviation increase in EF, the odds of a higher ADHD severity category decreased (OR = 0.59, 95% CI 0.43–0.82, p = 0.002), independent of core autism symptom severity, other cognitive domains, and IQ.
2Executive function buffered the association between sensory over-reactions (hyperresponsiveness and sensory seeking) and anxiety: the positive link was significantly stronger at lower EF levels than at higher EF levels, and this moderation was specific to EF — no other cognitive domain showed the same effect.
3EF deficits were specific to the co-occurring ADHD group: children with ASD but without ADHD, and those with subclinical ADHD features, did not differ significantly from non-autistic children on EF, whereas the co-occurring ADHD group scored significantly lower (p < 0.001).
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What it does not show
Cross-sectional design: no causal inferences can be drawn; bidirectional relationships between EF, ADHD, and anxiety are possible. Anxiety was assessed only by parent questionnaire, not by clinician-administered diagnostic interview, limiting the specificity of anxiety findings. All participants were ethnically Chinese children from one clinic in Hong Kong; findings may not generalise to other populations. Only 13.4% of participants were female, limiting ability to examine sex-specific effects. The EF construct did not include cognitive flexibility (set-shifting loaded onto a different domain), so the findings apply to attention, working memory, and inhibition specifically. Performance-based EF tasks may not capture the everyday executive difficulties autistic children experience in natural settings. The subclinical ADHD group had only 48 children, limiting the reliability of findings specific to that subgroup.
Declared interests
Funded by The D.H. Chen Foundation. The authors declare no conflicts of interest.
The easy way to misread this
Do not read the EF-ADHD finding as proof that EF training will treat ADHD in autistic children. The study is cross-sectional and correlational, and the EF-anxiety moderation effects were small (standardised β = −0.08 for both sensory hyperresponsiveness and sensory seeking). The paper itself calls for longitudinal and intervention studies before clinical conclusions can be drawn.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →