Motor Learning: Measuring Performance - Vocabulary Flashcards

Vocabulary flashcards covering key measurement terms from the motor learning lecture notes.

Intra-rater reliability

The consistency of ratings by the same rater across multiple occasions.

Inter-rater reliability

The consistency of ratings between different raters assessing the same thing.

Objective measurement

Data that are quantifiable, observable, and free from personal judgment.

Subjective measurement

Data based on personal judgment or opinion, often from observation or performance quality.

Performance outcome measures

Measures that indicate the outcome or result of performing a motor skill; often discrete data and may miss process information.

Discrete data

Data that are counted or categorized rather than measured on a continuous scale.

Missing process information

Limitation of outcome measures: they do not reveal the underlying motor control processes.

Whole event vs. part of it

Outcome measures can capture either the entire performance or a segment (e.g., split times vs race times).

Performance production measure

Measures that indicate the performance of specific aspects of the motor control system during action (e.g., kinematics, kinetics, EMG); useful for learning and feedback.

Kinematics

Study of motion characteristics such as positions, velocities, and accelerations of body segments.

Kinetics

Forces that cause movement, such as joint moments and ground reaction forces.

Electromyography (EMG)

Measurement of electrical activity of muscles during movement.

2D video analysis

A simple analysis method using two-dimensional video data of movement.

3D motion capture

A advanced technique for capturing three-dimensional body motion.

Error measurement

Evaluation of performance accuracy; can reveal causes of issues via consistency or bias.

Absolute error (AE)

Absolute value of the difference between actual performance and criterion on each trial; AE = sum |performance − criterion| / number of trials.

Constant error (CE)

Signed difference between actual performance and criterion across trials; CE = sum (performance − criterion) / number of trials.

Variable error (VE)

Standard deviation of the CE scores; VE = sqrt( sum (performance − Avg. CE)^2 / number of trials ).

Radial error

2D error measure: the hypotenuse of the right triangle formed by the x and y deviations (distance from target).

RMSE (Root-mean-squared error)

Average of the squared differences between the subject’s response and the stimulus over time, square-rooted to give one RMSE score.