Saturday, January 27, 2007

Norm of reaction and Williams Syndrome   posted by Razib @ 1/27/2007 01:40:00 PM

Despite the differences in upbringing, in both countries children with Williams syndrome were rated significantly higher in global sociability and their tendency to approach strangers than were their typically developing counterparts. But cultural expectations clearly influenced social behavior, since the sociability of normal American kids was on par with Japanese Williams syndrome kids, whose social behavior is considered out of bounds in their native country.

Norm of reaction "describes the pattern of phenotypic expression of a single genotype across a range of environments." So it seems there is a weakness in this study: Americans (mostly of European ancestry) do not share the same genetic background as Japanese. So a better test would be Japanese American children with Williams Syndrome vs. Japanese.