They did specifically say, on page 6:

3 A PRAGMATIC APPROACH

A long-term research agenda for developing human-centered in- formation spaces is necessarily ambitious. We argue it should be pursued incrementally and strategically by situating initial efforts in the context of specific domain activities and focusing on cen- tral problems of those domains. This approach allows one to nar- row the enormous design space of information behaviors, while chipping away at the cognitive design and systems engineering challenges therein. It should also be informed by theory and data. In our work, we leverage the framework provided by distributed cognition [15, 17] and methods of cognitive ethnography [16]. Dis- tributed cognition seeks to understand the organization of cognitive systems. Unlike explanatory theories of cognition, it extends the reach of what is considered ’cognitive’ beyond the individual to encompass interactions between people and with resources and the material environment. Methods of cognitive ethnography build on this framework, providing tools for determining what things mean to the participants in an activity and for documenting the means by which these meanings are constructed.

Based on our prior work and ecosystem of current tools, we suggest that the activity of data analysis and visualization and the pervasive problem of activity fragmentation are an ideal testing ground for exploring these concepts.