Spatial language in Williams syndrome: evidence for a special interaction?

We present data on the language of space in Hungarian individuals with Williams syndrome (WS; 19 in the first, 15 in the second study, between 8; and 21; 11) and a verbal control (VC) group of typically developing (TD; 19 in the first, 15 in the second study, between 3;5 and 10;7) children from: (1) a study of elicited production and comprehension of spatial terms; and (2) a sentence completion task on case markers in their spatial and non-spatial use. The first study showed poorer performance in the WS group, but similar performance patterns and a special difficulty of SOURCE terms in both groups. We did not find overall group differences in the second study. We argue that WS performance patterns reflect WS spatial abilities and seem to be constrained by the same factors in WS as in TD. Results also lead us to conclude that, contrary to most previous claims, there is no selective deficit of spatial terms within WS language, and they also suggest that not all uses of spatial terms require activation of mental models of space.