This article discusses various metaphorical texts where the authors construct or ‘make up’ their own sources. Such data contrast with the kinds of examples usually found in studies of metaphor, where the source is typically one that is ‘pre-given’. From a discourse perspective, it becomes interesting to ask under what circumstances a speaker/writer would attempt to create a brand new source instead of simply drawing upon pre-existing entities and events. The article shows that constructed sources tend to be used when (...) the goal is the clarification of complex concepts. The complexity of the target concepts means that existing events and entities often lack the right structure that can easily be mapped onto the target, whereas the construction of their own sources allows the authors to have structures that are homologous with that of the target. (shrink)

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)