Developmental disorders are usually thought about in terms of their impairments. But a welcome trend in recent years is to document their advantages too. I’m not talking about dramatic savant skills like calendar calculating, but rather advantageous manifestations of basic cognitive differences. For example, investigators have shown that children with Tourette’s syndrome – a condition involving involuntary tics – have superior cognitive control and timing, compared with children without Tourette’s. Now Sue Fletcher-Watson and her team have added to this literature with a new study showing that children with autism spectrum disorders (ASD) are quicker than neurotypical children and adults at detecting subtle changes to a visual scene.
The task required that children with ASD and neurotypical children (aged 11 to 16; most were male), and non-ASD adults, look at pictures of non-social scenes (e.g. a furnished room) on a computer. Each scene appeared for just under half a second, the screen would go blank, then the scene would reappear with one subtle change. The changes could be located centrally in the scene or in the periphery, and they could be a change in colour of an object, a change in an object’s presence or absence, or location. The participants’ task was to spot the change as quickly as possible and say what it was.
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