A striking difference between physical and mental healthcare (broadly defined) is that processes and outcomes in the latter rely to a large extent on language use. Consider the following extract from the prototypical mental healthcare context of a psychological counseling session.Client: I'm super, super sensitive the last four or five days. I haven't been around people much, and it's kind of purposeful, I think. I just don't want to be around them, because I don't really feel like talking and because, well, they are something other than -it's fun to talk to them when I've got my act together, but when I don't, it's like it takes my mind away from what I'm doing. And I've had enough trouble, I don't want to lose track of it any more. But I was noticing on the way home that, from one song on the radio to the next, my mood shifts, sometimes almost 180 degrees. And it's like, the way I am right now, just the slightest little thing can change my emotions. It's like a feather in a rapid stream, which I don't like. I hate the instability of it. And yet, there doesn't seem to be any This is the Pre-Published Version.