We are delighted to be invited for this task as our own work on conceptual change (e.g. Duit & Treagust, 2003) so far has not explicitly included ideas of the conceptual metaphor field. In other words, we see this task as a chance to revise and further develop our more "classical" conceptual change views.
COMMENTS ON OUR OWN RESEARCH WORK ON THE ROLE OF ANALOGIES AND METAPHORSThe role of analogies and metaphors has played a significant part in our work on teaching and learning science. Reinders Duit's academic study leave at the Science and Mathematics Education Centre (SMEC) of Curtin University in 1988 was the start of that work. Duit (1991) summarized the state of literature on the role of analogies and metaphors in science teaching and learning in a review paper. Analogies were seen as comparisons of structures between two domains based on structural similarities between these domains used to initiate understanding of the key features of a concept to be learned. With regard to metaphors we conceptualized them as analogies with particular emphasis: "taken as literal, a metaphorical statement appears to be perversely asserting something to be what it is plainly known not to be. … But such 'absurdity' and 'falsity' are of the essence: in their absence, we would not have a metaphor but merely a literal utterance" (Black, 1993, p. 21). Briefly put, a metaphor in this sense compares entities without doing so explicitly. Metaphors are comparisons where the basis of comparison must be revealed or even created by the addressee of the metaphor. A "good" metaphor always includes some dose of surprise. Clearly, this is a different meaning compared to the conceptual metaphors discussed in the various papers of the present issue. As used in these studies, conceptual metaphors denote linguistic figures of speech based on