This paper takes one step towards addressing the question of how activity mediated by shared representations — notations that are manipulated by more than one person — might constitute knowledge construction activity, and how the shared representations are appropriated for this purpose. The primary contribution of this paper is a methodology for qualitative analysis of activity in a workspace built on the concept of “uptake”: how participants take up and build on prior contributions. By examining patterns of uptake we can see ways in which participants ’ activities constitute an intersubjective cognitive activity distributed across persons and the representations they are manipulating. The analysis is conducted in three phases: identification of acts of media manipulation, identification of information uptake relations between these acts, and application of theoretical perspectives to identify evidence of knowledge construction via the representational media. The uptake graph is intended to minimize theoretical commitments in order to support eclectic analysis. The methodology is applied to data from a prior study in which participants collaborated via an evidence map and a chat tool. These case examples illustrate how the methodology uncovered argumentation and knowledge construction conducted solely through the graph workspace
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