PES quiz

Which aspect of the tasks conducted in Lab 5 best exemplifies closed-loop motor control?

Forming the initial three loops for the knot-tying task

ID can be increased by one unit by cutting the target in half or by doubling the movement amplitude (while holding the other value constant).

true

Based on the finite capabilities of human information processing, what is the approximate boundary for the length of time that it takes to complete an action and still utilize closed-loop control? In other words, any action that lasts less than _________ milliseconds cannot be corrected using closed-loop control.

300

In class, we discussed two exceptions to the SATO, which included timing accuracy in anticipatory tasks and timing accuracy in forceful movements. For the latter category, beyond what force range of a Maximum Voluntary Contraction (MVC) do researchers observe a decrease in errors?

50-70%

In Fitts' Task, the Index of Difficulty (ID) represents the relationship between Movement Amplitude and Target Width. Movement Amplitude is the distance between two targets while Target Width is the size of the target.

true

Open-loop motor control is characterized by feed forward rather than feedback

true

The Speed-Accuracy Tradeoff (SATO) is a fundamental limitation of human movement control.

true

The results of the Slater-Hammel (1960) experiment suggest that a person needs about 200 milliseconds to inhibit a preplanned response.

true

When signing your name to a space that is smaller than one you are accustomed to, this is an example of adjusting the Parameter Settings.

true

f you were to summarize research on rapid, discrete aiming in a succinct sentence, which of the following would be the most accurate?

As movement velocity increases, so does variability.

Sometimes, performers may successfully or unsuccessfully attempt to make corrections during rapid actions. Two examples of this interesting phenomenon of motor control could include checking (stopping) one's swing in a baseball or softball game and realizing too late that you just closed your car door after locking the key fob inside. These examples may be best explained by what mechanism?

Enacting a second Motor Program before full completion of the first

Which motor skill does not constitute an example of utilizing open-loop motor control?

Heading a ball in soccer Catching a line drive in softball Flipping a light switch Pressing an elevator button

Which mathematical equation best describes Fitts' Law?

MT = a + b*ID

Which aspect of the tasks conducted in Lab 5 best exemplifies open-loop motor control?

Pulling a completed knot tight in the final step

Which line of evidence for motor programs suggested that our movements our planned in advance and lengthier (more) movements will take longer to program?

Reaction Time Studies

As a researcher, if I want to know if two motor skills utilize the same Generalized Motor Program (GMP), what Invariant Feature should I examine via the recording of multiple trials of the activity in question?

Relative Timing

In a motor skill such as Fitts' Task, which of the following statements best describes the way that the movement is conducted?

The first part of the movement is controlled in an open-loop fashion and the second part is controlled in a closed-loop fashion

What would be the best example of Coincidence-Anticipation Timing (CAT)

catching a ball

Another name for the Speed-Accuracy Tradeoff (SATO) is Fitts' Law, due to the immense amount of research that was conducted on the topic by Dr. Paul Fitts.

false

When the amplitude of the movement is exactly _______ (as) the width of the target, the ID is zero.

one half