Discourse processing certainly represents an aspect of verbal communication that will allow bridge between more classically language-related aspects of cognition and other aspects of cognition that are not exclusive to language but nonetheless allow optimal interpersonal communication abilities. Studying discourse together with other disciplines could help us to understand different aspects which take part in communication processes and could be impaired in Alzheimer communication: how we perceive the world, remember things, comprehend social and linguistic events, and act effectively to satisfy one's needs.
Studies in discourse impairments in brain-damaged individuals should systematically incorporate an appreciation of all cognitive abilities that are necessary in order to achieve normal interpersonal communication (working memory, semantic memory, attention, inferential abilities, visual skills...) Also these studies should propose approaches that enable capturing inter and intra subject variability.
The major issue between persons living with AD and the people who interact with them is communication. We need to really listen, to make sure that we understand and are understood.
How people acquire and represent knowledge about their world, how they organize and use that knowledge, how they use language in speaking. This is a complex cognitive skill. So that, the management of knowledge is a complex cognitive skill and I suggest to focus the study of Alzheimer discourse on that issue: Which is the rol of knowledge in dicourse production and comprehension?