MC Exam 2: Studying Motor Performance

Question 1

What is a discrete skill?

Answer 1

recognizable beginning and end

EX: kicking, throwing

can be highly motor or highly cognitive

Question 2

What is a continuous skill?

Answer 2

no recognizable beginning or end

ex: walking, running, swimming

Question 3

What is a serial skill?

Answer 3

number of discrete tasks strung together

order and timing may be important

starting a car, playing the piano

Question 4

What is a closed skill?

Answer 4

the environment is somewhat constant

Ex: an assembly line, treadmill, bicep curl

Question 5

What is an open skill?

Answer 5

environment is constantly changing

ex: driving on busy road

Question 6

What are three criteria for measuring motor behavior?

Answer 6

objective, reliable, valid

Question 7

What is objectivity?

Answer 7

will two observers get the same result when evaluating the same motor performance

Question 8

What is reliability?

Answer 8

is measurement reproducible

Question 9

What is inter rater reliability?

Answer 9

do different people rate the same

Question 10

What is intra rater reliability?

Answer 10

how consistent is same person

Question 11

What is validity?

Answer 11

are you measuring what you think and want to measure

Question 12

What in content validity?

Answer 12

does instrument measure all dimensions of a particular function

Question 13

What is face validity?

Answer 13

does instrument appear to measure what it sets out to measure at face value

Question 14

What is construct validity?

Answer 14

does instrument accurately measure a construct

Question 15

What is concurrent validity?

Answer 15

does instrument agree with other instruments used

Question 16

What is sensitivity?

Answer 16

a test detecting dysfunction when it is present

100% sensitivity = no false negatives

negative test rules out a dysfunction (Snout)

Question 17

What is specificity?

Answer 17

a test detecting no dysfunction when it is not present

100% specificity = no false positives

a positive test rules in a dysfunction

Question 18

What are four ways to measure outcome?

Answer 18

1. error
2. time and speed
3. movement magnitude
4. performance

Question 19

What are three types of error?

Answer 19

1. constant error- how far deviated from target
2. absolute error- overall deviation w/o concern of sign
3. variable error- consistency of trials

Question 20

What is main measurement for time and speed?

Answer 20

reaction time- this is time from the beginning of stimulus to beginning of a response

Question 21

What does reaction time involve?

Answer 21

central planning (premotor) and muscle activation (motor)

Question 22

What is movement time?

Answer 22

the initiation of response to the end of the movement

Question 23

What is reaction time and movement time?

Answer 23

response time

Question 24

What is movement magnitude?

Answer 24

1. how large is movement?- long jump, how far can you get in an obstacle?
2. physiological reaction- BP, HR, O2, EMG

Question 25

Who is Edward Muybridge?

Answer 25

he first started studying movement though time lapse photography

Question 26

What is usual muscle pattern on an EMG?

Answer 26

1. the moving of muscle
2. stopping of muscle
3. stabilizing of muscle

Question 27

What is important to remember about correlation?

Answer 27

correlation does not indicate causation