Optical Trajectories and the Informational Basis of Fly Ball Catching

Richard S. Marken
2005 Journal of Experimental Psychology: Human Perception and Performance  
2002) plotted the optical trajectories of uncatchable fly balls and concluded that linear optical trajectory is the informational basis of the actions taken to catch these balls. P. McLeod, N. Reed, and Z. Dienes (2002) replotted these trajectories in terms of changes in the tangent of optical angle over time and concluded that optical acceleration is the informational basis of fielder actions. Neither of these conclusions is warranted, however, because the optical trajectories of even
more » ... le balls confound the information that is the basis of fielder action with the effects of those same actions on these trajectories. To determine the informational basis of fielder action, it is necessary to do the control-theory-based Test for the Controlled Variable, in which the informational basis of catching is found by looking for features of optical trajectories that are protected from experimentally or naturally applied disturbances.
doi:10.1037/0096-1523.31.3.630 pmid:15982135 fatcat:3rt3bdmhbnbmlbm7ax46beulqu