This paper examines language and number understanding in infants with Down syndrome and Williams syndrome and compares infant performance to that of adults. The crosssyndrome/ cross-domain studies demonstrate that the pattern of performance of infants with Down syndrome and Williams syndrome on two tasks assessing language and number cannot be derived from the pattern of profi ciencies and impa...

Do environments or species traits that lower the mortality of individuals create selection for delaying senescence? Reading literature creates an impression mathematically oriented biologists cannot agree on validity George Williams' prediction (who claimed 'yes'). The abundance models and opinions may bewilder those are new to field. Here we provide heuristics as well simple outline when Willi...

Texture segmentation and Williams syndrome 2 Abstract Williams syndrome (WS) is a developmental disorder in which visuo-spatial cognition is poor relative to verbal ability. At the level of visuo-spatial perception, individuals with WS can perceive both the local and global aspects of an image. However, the manner in which local elements are integrated into a global whole is atypical, with rela...

We propose a greedy mixture reduction algorithm which is capable of pruning mixture components as well as merging them based on the Kullback-Leibler divergence (KLD). The algorithm is distinct from the well-known Runnalls’ KLD based method since it is not restricted to merging operations. The capability of pruning (in addition to merging) gives the algorithm the ability of preserving the peaks ...

BACKGROUND AND PURPOSE Williams syndrome, a rare genetic disorder with a striking neurobehavioral profile characterized by extreme sociability and impaired visuospatial construction abilities, is caused by a hemideletion that includes the elastin gene, resulting in frequent supravavular aortic stenosis and other stenotic arterial lesions. Strokes have been reported in Williams syndrome. Althoug...

Williams syndrome is a neurodevelopmental genetic disorder caused by a hemizygous deletion on chromosome 7q11.23, resulting in atypical brain structure and function, including abnormal morphology of the corpus callosum. An influence of handedness on the size of the corpus callosum has been observed in studies of typical individuals, but handedness has not been taken into account in studies of c...