Examining the relationship between executive functions and restricted, repetitive symptoms of Autistic Disorder.
In adults with autism, only cognitive flexibility, working memory, and response inhibition correlate with restricted/repetitive behaviors, so focus your assessments and treatments on those three.
01Research in Context
What this study did
Saunders et al. (2005) asked which executive-function (EF) skills line up with restricted, repetitive behaviors in adults with autism. They gave standard EF tests and autism symptom checklists to a small adult group.
The team looked at five EF areas: planning, fluency, working memory, response inhibition, and cognitive flexibility. Then they ran simple correlations with repetitive-symptom scores.
What they found
Only three EF skills showed a clear link to restricted/repetitive symptoms. Adults who were poorer at cognitive flexibility, working memory, or response inhibition had more repetitive behaviors.
Planning and fluency scores had no relation to the symptoms. In short, flexibility, memory, and inhibition matter; planning and word generation do not.
How this fits with other research
Iversen et al. (2021) pooled almost 3,000 participants and found the same medium-sized links, so the 2005 result still holds. Their meta-analysis puts the 2005 paper inside the bigger picture.
Karaca et al. (2026) looked at adults with high-functioning autism and saw deficits in all five EF domains, including planning and fluency. That seems to clash with the 2005 finding, but Şeyda measured group differences, not which skills track with repetitive symptoms. Planning can be weak in the group yet still unrelated to how severe the behaviors are.
Hoyle et al. (2022) extended the idea to children. They showed that repetitive behaviors jump only when kids face two EF demands at once (inhibition plus switching). This adds a ‘double-load’ rule that the adult study did not test.
Why it matters
When you assess an adult with autism, probe cognitive flexibility, working memory, and response inhibition first. These are the EF pockets that mirror repetitive-symptom severity. Targeting those three skills in intervention, rather than broad EF training, may give you the cleanest shot at reducing restricted and repetitive behaviors.
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02At a glance
03Original abstract
The executive function theory was utilized to examine the relationship between cognitive process and the restricted, repetitive symptoms of Autistic Disorder (AD). Seventeen adults with AD were compared to 17 nonautistic controls on a new executive function battery (Delis-Kaplin Executive Function Scales). Restricted, repetitive symptoms were measured by a variety of instruments (i.e., the Autism Diagnostic Observation Schedule, Autism Diagnostic Interview-Revised, Gilliam Autism Rating Scale, and the Aberrant Behavior Checklist). The study replicated the executive function profile that has been reported in adults with AD. In addition to the replication findings, the study found several executive processes (i.e., cognitive flexibility, working memory, and response inhibition) were highly related to the restrictive, repetitive symptoms of AD; whereas, other executive process (i.e., planning and fluency) were not found to be significantly correlated with restricted, repetitive symptoms. Similarly, we found an executive function model consisting of relative strengths and deficits was the best predictor of restricted, repetitive symptoms of autism. The implications for the executive function theory and how the theory predicts core symptoms of autism are discussed.
Journal of autism and developmental disorders, 2005 · doi:10.1007/s10803-005-5035-x