Executive function, repetitive behaviour and restricted interests in neurodevelopmental disorders.
Executive-function problems do not always predict repetitive behaviors in autism, so match your intervention to the syndrome’s real drivers.
01Research in Context
What this study did
Perry et al. (2022) compared executive function (EF) and repetitive behaviors in adults with four conditions: autism, Cornelia de Lange, fragile X, and Rubinstein-Taybi syndromes.
They gave standard EF tests and behavior rating scales to see if poorer EF lined up with more repetitive behaviors in each group.
What they found
Every group scored below average on EF tests, but the link between EF problems and repetitive behaviors was not the same.
In autism, EF scores did not predict repetitive behaviors at all; in the three genetic syndromes the links were present but differed by syndrome.
How this fits with other research
Iversen et al. (2021) pooled almost 3,000 kids and found a clear medium-size tie between poor EF and more repetitive behaviors in autism. Victoria’s team saw no tie in their autistic adults, creating an apparent contradiction. The gap likely comes from age: kids versus adults and different EF measures.
Saunders et al. (2005) first showed that flexibility, working memory, and inhibition linked to repetitive behaviors in autistic adults. Victoria’s autism group showed no link, suggesting the adult EF-RRB tie may be weaker or need specific tests.
Case-Smith et al. (2015) described a unique repetitive-behavior profile in Rubinstein-Taybi syndrome. Victoria’s RTS adults also showed syndrome-specific patterns, confirming that each genetic condition needs its own lens.
Why it matters
If you write plans for autistic clients, do not assume EF training will directly cut repetitive behaviors; the adult data show no automatic link. Instead, assess the person’s exact EF profile and target repetitive behaviors with environmental or sensory strategies. For clients with CdLS, FXS, or RTS, check whether flexibility or inhibition issues fuel their repetitive habits and tailor supports to that synergy.
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02At a glance
03Original abstract
BACKGROUND: Individuals with genetic syndromes show unique profiles of repetitive behaviours and restricted interests (RRBs). The executive dysfunction account of RRBs suggests that in autistic (AUT) individuals executive function impairments underpin RRBs, but not communication and social interaction autistic characteristics. AIMS: To 1) describe profiles of behavioural manifestations of executive function (EF behaviours) and 2) explore the relationship between EF behaviours and autistic traits across individuals with Cornelia de Lange (CdLS), fragile X (FXS) and Rubinstein-Taybi syndromes (RTS), and AUT individuals. METHOD: Carers completed the Behavior Rating Inventory of Executive Function - Preschool Version and the Social Communication Questionnaire. Data reporting on 25 individuals with CdLS (Mage = 18.60, SD = 8.94), 25 with FXS (Mage = 18.48, SD = 8.80), 25 with RTS (Mage = 18.60, SD = 8.65) and 25 AUT individuals (Mage = 18.52, SD = 8.65) matched on chronological age and adaptive ability were included in analyses. RESULTS: All groups showed impairments across EF behaviours compared to two-to-three-year-old typically developing normative samples with no differences between groups. Different EF behaviours predicted RRBs in the syndrome groups with no associations found in the AUT group. CONCLUSIONS: Syndrome related differences should be considered when developing targeted interventions that focus on EF behaviours and/or RRBs in these groups.
Research in developmental disabilities, 2022 · doi:10.1016/j.ridd.2021.104166