Smell Test Could Provide Earlier Diagnosis of Autism

Researchers find that unlike typically developing children, most kids with autism fail to adjust their sniffing to stinky odors.

Imagine the way you might smell a rose. You’d take a nice big sniff to breathe in the sweet but subtle floral scent. Upon walking into a public restroom, you’d likely do just the opposite–abruptly limiting the flow of air through your nose.

Now, researchers reporting in the Cell Press journal Current Biology have found that people with autism spectrum disorder (ASD) don’t make this natural adjustment like other people do. Autistic children go right on sniffing in the same way, no matter how pleasant or awful the scent.

The findings suggest that non-verbal tests related to smell might serve as useful early indicators of ASD, the researchers say.

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