How Aphasia Influences Written and Spoken Texts

Aphasia is disorder of the brain influencing language processing which occurs after the brain damage (such as stroke or brain tumor). People with aphasia have problems in communication in both spoken and written language. Their abilities to understand conversations or written sentences are strongly affected too. In this paper we analyze both written and spoken texts with a help of the graph theoretical, statistics and linguistics methods. We compare several statistical measures and other properties in texts, written or spoken, by people with and without aphasia.