The ways in which languages express primary sense qualities have been investigated quite unevenly, which is due to the fact that there are great differences in how the senses are linguistically represented, which in turn reflects differences in these sense qualities themselves and their role in cognition.

Unlike a great deal of research on expert/non-expert communication, most of which is based on written materials, this article focuses on face-to-face communication. The analysis is based on a large corpus of transcribed recordings of medical seminars in rehabilitation centres and of interviews with chronically ill patients suffering from heart conditions. The focus is on procedures of illustration, which are often combined with reformulation procedures. Four main types are described: metaphors, exemplification, `scenarios', concretization. Whatever the type of illustration used, participants (...) in face-to-face interaction show a marked preference for procedures which relate abstract medical information to everyday life and experience. After a brief outline of the theoretical approach adopted the analysis proceeds in two steps: first, the emphasis is on techniques employed by the `experts', then on those used by `non-experts', i.e. patients. This is followed by an examination of the question how the roles of expert and non-expert are constituted in and by interaction. (shrink)