Monthly Archives: November 2010

Non-specific variables

The idea seems to recur to me that good dynamical modeling needs to not only define its systems with care, and their dynamics, but it also needs to pick its variables with care. They should be as meaningless as possible. This is why we can see something interesting in the blinking of the eye, the twitching of the thumps on the video controller, the synchronization of eye movements in/as film… Being entirely non-specific, they might appear the same to everyone.

Don Norman had the notion of weak general interfaces. The keyboard and the video game controller are good examples. But so are the eyeballs. Are the hands acting as sensory devices as they play GTA? Why yes! Looking at it like this makes it clear that there is no ‘perception’ that is differentiable from action.

Susan Hurley said that the ecological approach was instrumental, and the dynamic approach was constitutive. Perhaps these two approaches see the same relation from different sides, as it were. The ecological approach points out the lawfulness inherent in the P/A relation. Lawfulness is boring. No information, because it behaves as expected. That is one view. Like looking at the single cell from the outside, knowing all about its metabolism, the glucose and the gradient. It looks mechanical.  It is too, given some very important presuppositions.  One of which is that there is something it is like to be the cell.

Dynamics ought to allow one to keep that in mind, while simultaneously acknowledging the view from the inside. Hence it allows the constitutive to appear.

 How might one investigate more specific instances, such as dance, in which there is more feeling, and sensory-motor skill is required?  We have meaningless ones of these too, in sport.