What categorical induction variability reveals about typical and atypical development.
Lisa Tecoulesco, Deborah Fein, Letitia R Naigles
PMID 33198848WHAT IT FOUND
Children with autism were less likely to use a shared category name to extend a property.
Typically developing peers did so more consistently, and early shape bias predicted later category reasoning only in typical development.
Key findings
01Typically developing children extended a property to category matches above chance, while children with autism did not differ from chance.
02Children with autism extended properties to perceptual matches more often than typically developing children, but their perceptual-match performance was not different from chance.
03Shape bias measured at an earlier visit was related to later categorical induction in typically developing children, but not in children with autism.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The ASD group had only 16 children, and the TD group had 30, so the study is small and cannot support fine-grained conclusions. Only children with autism who could complete the yes/no categorical induction task were included; 5 children did not complete it and 3 answered yes to every question, so results may not apply to children unable to perform the task. The ASD group was chronologically older than the TD group because the groups were compared after language ability was considered. Children's attention and overselective focus during testing may have affected performance. The shape bias score came from one visit and may not reflect each child's peak shape bias, especially for children with autism whose performance varied across visits. The shape bias task used 2-dimensional videos and a color foil, which differs from some canonical 3-dimensional or texture versions.
Declared interests
The article is listed as supported by NIH extramural research funding. No author conflict-of-interest declaration is provided in the supplied text.
The easy way to misread this
Do not conclude that children with autism lack category knowledge or that training shape bias will improve semantic reasoning. The study shows weaker use of category labels for property extension, not a treatment effect, and it included only children with autism who could complete the task.