Neural Responses to a Putative Set-shifting Task in Children with Autism Spectrum Disorder.
Kids with autism activate memory areas more during set-shifting, even when performance looks typical.
01Research in Context
What this study did
Dirks et al. (2020) scanned the brains of kids with autism while they switched between sorting rules. The task looked like a card game: first sort by color, then suddenly switch to shape. Kids had to ignore the old rule and follow the new one.
The team compared brain activation in kids with autism to typically developing peers. They watched which areas lit up during these set-shifting trials.
What they found
Both groups sorted cards equally well. No speed or accuracy differences showed up. But inside the brain, kids with autism activated the parahippocampal area more during switch trials. This region helps pull up past memories.
The extra activation suggests kids with autism lean on memory tricks to compensate when rules change. Their behavior looks typical, yet their brains work harder behind the scenes.
How this fits with other research
de Leeuw et al. (2024) extends this finding. They tracked hippocampal connections across age and found weaker posterior specialization in autism. Together the studies paint a picture: memory circuits in autism are altered both during moment-to-moment shifts and across development.
Giesbers et al. (2020) and Desaunay et al. (2020) show similar memory quirks. Both report lower accuracy and different brain waves when kids with autism recall paired pictures or associations. The set-shifting compensation Bryce found fits this pattern: memory systems work overtime to keep up.
Li et al. (2021) adds eye-tracking evidence. Their kids with autism also used extra visual references during spatial memory. All four studies agree—when tasks tax memory, autism brains recruit additional supports.
Why it matters
You may see smooth rule-following in your learner, but hidden effort could drain bandwidth for new skills. Dirks et al. (2020) tells us to check for fatigue after shifts. Offer visual cues or brief breaks when you change tasks. Simplify instructions and pre-teach new rules to ease the memory load. These small tweaks honor the quiet extra work autism brains do every time the game changes.
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02At a glance
03Original abstract
While much progress has been made toward understanding the neurobiology of social and communication deficits associated with autism spectrum disorder (ASD), less is known regarding the neurobiological basis of restricted and repetitive behaviors (RRBs) central to the ASD diagnosis. Symptom severity for RRBs in ASD is associated with cognitive inflexibility. Thus, understanding the neural mechanisms underlying cognitive inflexibility in ASD is critical for tailoring therapies to treat this understudied yet pervasive symptom. Here we used a set-shifting paradigm adopted from the developmental cognitive neuroscience literature involving flexible switching between stimulus categories to examine task performance and neural responses in children with ASD. Behaviorally, we found little evidence for group differences in performance on the set-shifting task. Compared with typically developing children, children with ASD exhibited greater activation of the parahippocampal gyrus during performance on trials requiring switching. These findings suggest that children with ASD may need to recruit memory-based neural systems to a greater degree when learning to flexibly associate stimuli with responses. LAY SUMMARY: Children with autism often struggle to behave in a flexible way when faced with unexpected challenges. We examined brain responses during a task thought to involve flexible thinking and found that compared with typically developing children, those with autism relied more on brain areas involved in learning and memory to complete the task. This study helps us to understand what types of cognitive tasks are best suited for exploring the neural basis of cognitive flexibility in children with autism. Autism Res 2020, 13: 1501-1515. © 2020 International Society for Autism Research, Wiley Periodicals, Inc.
Autism research : official journal of the International Society for Autism Research, 2020 · doi:10.1002/aur.2347