Aphasia is a systemic disturbance of speech, revealing in the complete loss or partial loss of speech and local lesion caused by one or more of the speech areas in the brain. In most cases, aphasia occurs in adults, however, it is also possible in children, if the brain injury occurred after it had been formed, at least partially. The term ‘aphasia’ is derived from the Greek ‘fasio’ (say) and t...

Differential profiles of language impairments in genetic developmental disorders have been argued to reveal the component parts of the language system and perhaps even the genetic specification of those components. Focusing predominantly on a comparison between Williams syndrome and Specific Language Impairment, we argue that the detailed level of behavioural fractionations observed in these di...