Assessing Motor Performance

1
Assessing Motor Performance
2
Performance Outcome Measures

• Measurement of the movement result
• Reaction Time
• Movement Time
• Error Scores
• Distance

3
Movement Response
Movement Time
Reaction Time
initiation of movement
completion of movement
signal
4
Reaction Time

• Simple - involves one external signal one
  response

5
Reaction Time

• Choice - involves multiple signals multiple
  responses

6
Reaction Time

• Discrimination - involves multiple choices
  single responses

7
Movement Response

• Reaction time and movement time used together to
  determine whether movement is being planned in
  advance or during execution
• Practical Implication?

8
Performance Errors

• Absolute Error - measures the overall amount of
  error in performance
• ?X1? ?X2 X3 / trials
• (without regard to sign)

9
Performance Errors

• Variable Error - represents the degree of
  consistency or variability associated with a
  performance
• (X1) (X2) (X3) / trials
• consider sign

10
Performance Errors

• Constant error - measures level of bias in
  performance - considers amount and direction of
  error
• ?CE - (?CE) / trials

2
2
trials
11
Understanding Error
4
AE 2.00
3
CE 2.00
VE 1.00
2
1
0


12
Understanding Error
4
AE 2.00
3
CE -2.00
VE 1.00
2
1
0


13
Understanding Error
4
AE 2.00
3
CE 0.00
VE 2.16
2
1
0


14
Understanding Error
4
AE 2.00
3
CE -1.00
VE 2.24
2
1
0


15
Process Measures

• Measurement of the production of movement
• Force Output
• EMG
• Velocity
• Displacement

16
Response Process Measures

• Kinematic Descriptors - quality of motion
• Video film analysis

17
Response Process Measures

• Kinetic Descriptors - forces during motion
• Force plate measures