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Chapter 7
PERFORMANCE AND MOTOR CONTROL CHARACTERISTICS OF FUNCTIONAL SKILL
7
Medical
Undergraduate 2
03/18/2015

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Cards

Term
Manual Aiming Skills
Definition

·      Speed is determined by the performer (versus skills where the speed is determined by the skill itself, ie: throwing a baseball, typing, etc.)

Term
What is Speed Trade-off?
Definition

·      A trade-off the emphasizes speed negatively impacts accuracy and vice versa


 

·      Fast and accurate movement or accurate movement at an unspecified speed


 

·      Ex: a soccer player making a penalty kick; need to sacrifice accuracy for speed, or vice versa

Term
What is Fitts Law?
Definition

·      Predicts movement time for aiming movement (that requires both speed and accuracy)


Index of dificulty 

 

Term
What is the equation for Fitts Law?
Definition

MT = a+b log2(2D/W)


MT = Movement Time

A & B = Constants

D = Distance Moved

W = Target Width 

Log2(2D/W) = Index of Difficulty

Term
How Do You Calculate the Index of Difficulty?
Definition

| Log2 (2D/W) = X | D =32 W = 4 |


 Log2 (16) = X


2= 16 | 24 = 16 


Log2 (16) = 4

 

Term
What are the two Motor Processes Outside the lab?
Definition

2.     Closed-loop control process: feedback used

Term
What are the Phases of Visual Information?
Definition

§  CNS needs to interpret this information to determine what modifications need to be made

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