Measurement Of Motor Skills Flashcards
(51 cards)
What is performance measurement essential for
- Performance assessment/evaluation
- Motor learning and control research
What are the two general categories of performance measurements
- Performance outcome measures
- Performance production measures
What are performance outcome measures
- category of motor skill performance that indicates the outcome or result of performing a motor skill
- e.g. how far someone threw a ball
What do performance outcome measures not inform us about
- behaviour of the limbs of the body that led to outcome
- the activity of various muscles involved
What are performance production measures
- measures of motor skill performance that indicate the performance of specific aspects of the motor control system during the performance
- e.g. EMG, EEG, recordings
What are examples measures of measurement devices for performance outcome measures
- time to complete a task
- amount of error in performing criterion movement
- number of successful attempts
- time on/off balance
- distance
- trials or reps to complete
Examples of measures of measurement device for performance production measures
- displacement
- velocity
- acceleration
- joint angle
- Joint torque
- EMG
- EEG
- PET
- fmri
What are error measures
Allow us to evaluate performance for skills that have spatial or temporal accuracy action goals
- show us how well we perform against a criterion/goal
Spatial accuracy
Where something is occurring
Ie) throwing darts, high jump
Temporal accuracy
When something is occurring or the timing of a skill
Ie) ones timer, musical instrument, volleyball spike
What are one-dimension accuracy goals that assess error in skills
Absolute error (size of error)
Constant error (direction of error)
Variable error (consistency/variability)
Absolute error (AE)
- tells us magnitude of error
- how accurate we are
- average of the absolute values
AE = goal - actual
Constant error (CE)
- direction of error
- provides an index of tendency for the performance error to be directionally biased
= (performance - criterion)/ number of trials
Variable error (VE)
- consistency of error
- standard deviation of the constant error scores
- how variable the trials are (how close together)
= SD of CE scores
What are skills assessed by two dimension movement goals
Skills requiring accuracy in the vertical and horizontal directions
I.e) darts, archery, golf
What are 2 types of measuring two-dimensional accuracy
Radial error
Qualitative assessment of bias and consistency
Radial error
- AE for two direction accuracy
- similar to AE in one direction accuracy
- calculate hypotenuse of right angle triangle formed by the intersection of x and y axis
Qualitative assessment of bias and consistency
- general approach to assessing bias and consistency
- look at group of locations
Consistency errors
Difficulty in learning the skill
Bias errors
Difficulty in adapting the skill
What do continuous skills require
Spatial accuracy over a period of time
How do you assess error for continuous skills
Root mean squared error (RMSE)
What is RMSE
Indicated amount of error between performance curve produced and the criterion performance curve for a specific amount of time during which performance is sampled
- AE for continuous task
Kinematics
Description of motion without regards to force or mass
