A recent study in Jerusalem talks about how sniffing could possibly detect if a child is autistic or not.
The researchers proposed that non-verbal tests related to smell might serve as useful early indicators of autism spectrum disorder (ASD).
On their experiment, the researchers formed two groups of children, one group with autism and the other group is the normal developing children. Typical children adjusted their sniffing within 305 milliseconds of smelling an odour, the researchers said, children on the autism spectrum showed no such response. Therefore, to conclude, the way children sniff smells could be a basis to test and detect autism.
Researchers now plan to test whether the sniff-response pattern they have observed is specific to autism or whether it might show up also in people with other neurodevelopmental conditions.