Ray there are numerous books and articles on athletes and various "visualization " kinds of cues techniques ,etc .
The research ,however , is somewhat unclear as to how effacacious this kind of thing really is .There are somewhat conflicting accounts as to what works ,how it works ,and why .
Having said this ,there is no doubt that for some in some situations ,with some people ,these kinds of visualization techniques can be very effective .
Many athletes [myself included ] have reported as to being able to "see themselves performing " or visually "reherse " their technique in the "minds eye " so to speak .And that this kind of visual rehersal or internalized vision can be variously effective ,ie channels focus , helps to mitigate against negative thoughts or "extraneous "kinds of of impediments,acts a kind of controller of arousal states ,etc .
In terms of the other question ,that of tracking the ball ,this is ,in actuality ,a very complex kind of question .
You might want to do a search on the "ambient visual system" and "optic flow",to better understand why I would say that trying to conciously focus on a point would be somewhat "problematic " ,ie you are using a visual system that is designed for tracking slow moving objects .[If you do this search put it here and start a thread and I will add some stuff to it ].
I know that years ago ,when I first heard people talk of actively focusing on "the square" for example ,I said to myself "where and what the hell did I focus on " and when I went to hit live and think about this ,I said to myself that "I have really no idea exactly what I am focusing on ."
Later ,as I read some of Paul Nymans "stuff" that he put up on high speed tracking ,and when I saw othersimilar articles---including articles on elite athletes and "anticipation "---- I came to realize why my "instincts " were more correct than I realized .
I have Richard Schmidt's book and I have two books that I am currently reading "Visual Perception and Action in Sports" [A.Williams] and "Interceptive Actions in Sports" [eds.Kieth Davids].
Three sources of which have nothing but hundreds of pages explaining why its the BRAIN and not the HANDS that controls the process ,ie the "coupling of action to perception " and the process involved in how a dynamical system --in this case the dynamical system which is the brain ,and the human body ----learns to to ,for example ,find a ball at a precise point with a bat in hand .
Coupling action to perception is a "systems problem with systems soloution ."
Sorry to get all pedantic and sh*t on you Ray .Its just that the question came at a time when I have been going thru these books under the ongoing thoery that ---
-----"I aint that smart ,Ijust aint got nothin better to do ."
steve