Sunday, October 25, 2015

Probing the mysterious perceptual world of autism

The perceptual world of a person with autism spectrum disorder (ASD) is unique. Beginning in infancy, people who have ASD observe and interpret images and social cues differently than others. Caltech researchers now have new insight into just how this occurs, research that eventually may help doctors diagnose, and more effectively treat, the various forms of the disorder. The work is detailed in a study published in the October 22 issue of the journal Neuron. The new study investigated how visual input is interpreted in the brain of someone with ASD. In particular, it examined the validity of long-standing assumptions about the condition, including the belief that those with ASD often miss facial cues, contributing to their inability to respond appropriately in social situations. "Among other findings, our work shows that the story is not as simple as saying 'people with ASD don't look normally at faces.' They don't look at most things in a typical way," says Ralph Adolphs, the Bren Professor of Psychology and Neuroscience and professor of biology, in whose lab the study was done. Indeed, the researchers found that people with ASD attend more to nonsocial images, to simple edges and patterns in those images, than to the faces of people.

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