Williams Syndrome (WS):
(more or less) general cognitive retardation except in language
Results from the deletion of the long arm of chromosome 7.
Specific Language Impairment (SLI):
Language problems without any obvious cause.
fifty to seventy percent of children with SLI have at least one other family member with the disorder
If the brain is a general purpose problem solver, one’s
general intelligence should be predictive of abilities such as language.
For people affected by WS or SLI that’s simply not true.