Evidence suggests that visual processing is divided into the dorsal ("how") and ventral ("what") streams. We examined the normal development of these streams and their breakdown under neurological deficit by comparing performance of normally developing children and Williams syndrome individuals on two tasks: a visually guided action ("how") task,…

In normal-hearing children the latency of the P1 component of the cortical evoked response to sound varies as a function of age and, thus, can be used as a biomarker for maturation of central auditory pathways. We assessed P1 latency in 245 congenitally deaf children fit with cochlear implants following various periods of auditory deprivation. If…

A preliminary experiment was conducted to explore the effects of illiteracy on hemispheric specialization. Groups of literate and illiterate Iranian children were tested on three dichotic tapes consisting of monosyllabic animal names, double-digit numbers, and nonverbal environmental sounds. All children were also tested for handedness and for…

A study of differential brain hemisphere involvement in second language acquisition is reported. The study examined the idea that the right hemisphere is progressively more involved the later the second language is acquired. Various techniques for monitoring hemispheric functioning are described, especially the Evoked Potential (EP) technique. In…