Joint attention and intelligence in children with autism spectrum disorder without severe intellectual disability.

This study measured association, not causation, so it cannot show that improving joint attention will raise intelligence. The K-ABC test requires the child to follow the examiner's objects and directions, so poor joint attention may depress intelligence scores directly. The main analysis included only children assessed at ADOS-2 Module 2 language level, so the result may not apply to children with higher language or development levels. Children with K-ABC Mental Processing Index below 60 were excluded, so the paper does not describe children with severe intellectual disability. The study used the original Japanese K-ABC rather than the second edition, which the authors state did not align with best practice standards. No typically developing comparison group was included, so it remains unclear whether the same relation exists outside autism. Possible confounders such as parental financial situation and education were not measured.

Do not conclude that improving joint attention will raise intelligence. This study measured association only, and the K-ABC test itself requires joint attention, so poor joint attention could lower test scores rather than prove lower intelligence.