John Maeda posted my diagram on multitasking here, which in turn was a response to his original post. Sandwiched between them is an interesting filling "Converge or Diverge-Depends where you stand", which reminded me of two pieces of work that may complement John's thought-piece.
Rich Gold, when he was Manager - Research into Experimental Documents at Xerox Parc, presented the idea of the Humidity of Spaces. I have one or two of his original slides, the original links have long since decayed (as predicted by William Mitchell in City of Bits). The metaphor (which his staff hoped he wouldn't use) went like this:
There are three types of space that we work in
In Rich's words: "What is a “wet space”? Well this room ( in which Gold was delivering lecture) is a wet space. You can smell, touch, feel each other; Pheromones and hormones are swirling; Very “mammal” - pack formations, leaders; Lots of gossip.