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Focal
Vision and Movement Before
realizing there could be an ambient system for movement control,
scientists believed that a conscious focal system was the only way
visual information could influence action. Under
this outmoded view, a baseball batter watching a pitch come toward
the plate relied only on the relatively slow processes in the information-processing
stages to detect the balls flight pattern and to initiate changes
in movement control. This idea was supported by numerous
experiments that seemed to show that visual information requires
about 200 ms (or approximately the value of visual reaction time)
for processing (e.g., Keele & Posner, 1968) and that visual
control of action was particularly slow and cumbersome. However,
recent information about the ambient visual system, together with
the ideas about optical-flow processes in vision, have markedly
changed the understanding of visual information processing for action.
Focal
vision can dominate sensory input. Visual dominance prevents
the additional help of other sensory information: When vision dominates,
it sometimes actually leads to poorer performance when other senses
are more appropriate. If you use vision in a conscious information-processing
mode (i.e.,FOCAL VISION), processing can be slow and attention demanding.
On the other hand, if you use kinesthetic information (touch, feel,
balance), responses can speed up noticeably. Experiments on fencers
(]ordan, 1972) suggest just this, where allowing visual information
actually slowed performers responses by shifting attention away
from the more relevant kinesthetic senses.
In the same general way, asking a performer to concentrate
(consciously) on certain visual events can have detrimental effects
on performance. Such a shift to conscious processes would shift
control from the relatively fast ambient system to the slower focal
system. For example, coaches often use various visual aids for performance,
such as telling a batter to initiate the swing when the pitched
ball has passed a certain visually determined point in space or
when it is a certain measured distance away. Such an instruction
seems certain to cause a shift to conscious control by the ambient
system, probably resulting in poorer, rather than better, performance.
A more natural strategy would be to instruct the performer to watch
the ball and to swing when the time feels right. Such an instruction
should encourage the use of the ambient system, allowing the time-to-contact
information more reliably derived from optical flow to trigger the
response (McLeod, McLaughlin, & Nimmo-Smith, 1985).
This
is another example of the Bliss-Boder hypothesis, in which performance
is hurt by instructions to intervene in natural processes by conscious
activities that demand attention and controlled processing. Remember
that a high-level performer has developed many elegant, nonconscious
processes for detecting and processing visual and kinesthetic information,
along with very fast and effective processes for making corrections
based on this information. When asked by the coach to pay
attention to these processes, the performer is forced out of these
nonconscious modes of processing and into the more conscious, controlled
information- processing activities, which are usually not very effective
for skilled performance.
FEEDBACK
Feedback is information about the difference between some goal state
and performance. A coach gives you feedback when you take a swing
and he tells you your dropping your elbow or to hold the bat higher.
Feedback is extremely important. Dr. Schmidt makes thefollowing
statement on feedback;
Without doubt, one of the most important learning processes
concerns the use of feedback about actions attempted in practice
Some of these findings can be summarized as follows; If learners
have no knowledge of their own errors, then practice results in
no learning. Feedback in the form of Knowledge of Results (KR) generates
rapid and permanent learning. Generally, information about errors,
is essential for learning to occur.
Summary Feedback for Enhancing Learning
For years researchers have believed in the premise that the more
frequent the feedback, the faster the learning. Recent studies show
this is not true. Too much feedback can make the learner dependent
(learning lazy). It was found that with-holding feedback could increase
learning as measured by retention (how well you performed after
some period of time had passed). With-holding feedback for a certain
number of trials and then presenting it is called summary feedback.
In this method, first studied by Lavery (1962), the feedback is
withheld for a set of trials-say from 5 to 20 trials-and then is
summarized for the learner in various ways.
On the surface summary feedback would seem to be particularly
ineffective for learning. Early research by Lavery (1962; Lavery
& Suddon, 1962) and more recent efforts have shown that summary
feedback can be particularly effective for learning. Generally,
even though summary feedback is less effective than every-trial
feedback for performance during practice, when feedback is withdrawn
in retention tests, subjects who had received summary feedback performed
better than subjects who had received every-trial feedback. These
results show that, relative to every-trial feedback, summary feedback
produces poorer performance in the acquisition phase but better
learning, as measured on a retention test.
This is just what was shown in an experiment by Schmidt, Lange,
and Young (1990), who studied different numbers of summary feedback
trials on a laboratory task resembling batting in baseball. As seen
in Figure 10. 10, there was an inverted-U relationship between summary
length and learning, with the 5-trial summary feedback length being
best. Again, even though the 1-trial condition (every-trial feedback)
was best for performance during earlier practice, when feedback
was being presented, the 5-trial condition was best for learning.
MOTIVATION and GOAL SETTING
Common sense tells us that a motivated individual will try harder
than a unmotivated individual. Studies show this to be true. The
main difficulty is finding the most effect means of motivation.
Telling an athlete to do his or her best or to try harder are rarely
very effective. The most effective motivation results when the athlete
is given specific goals and sees concrete progress. The SMART POWER
TRAINING SYSTEM establishes very specific goals (bat speed, bat
power, reaction time, number of swings, etc.) and allows the athlete
to see the immediate results of his or her effort. The following
is taken from Dr. Schmidts book;
Most Important: Amount and Quality of Practice It almost goes
without saying that the most important variable for learning is
practice its self. With the highest skill levels shown by champion
athletes, the amount of time, effort, and practice that went into
preparation is very impressive. For example, Kottke, Halpern, Easton,
Ozel, and Burrill (1978) estimated that across 15-year careers in
their respective sports, a quarterback in professional football
throws 1.4 million passes and a basketball player shoots 1.0 million
baskets! It is clear that a high level of practice is critical for
sophisticated skill development, so the athlete who really wants
to be successful should be prepared to maximize the amount of practice.
Theres no easy way around it.
But the amount of practice time is not the only concern here.
Certainly, the quality of this practice is critical, too. A athlete
can exert much effort over many hours in ineffective practice, emerging
with little to show for it except boredom and frustration. It is
critical to organize and structure practice effectively.
The SMART POWER TRAINING SYSTEM uses all of these concepts. All
of the SMART POWER products provide vital information about your
swing performance. The SMART TRAINING manual tells you how to most
effectively use this information to get the greatest results in
the least amount of time.
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