Chapter 2 Flashcards
(38 cards)
Response Outcome Measures
Chronometry
Performance Errors
Chronometry
Timing/Duration of movements -Reaction time Simple Rt Choice Rt Discrimination Rt
Reaction Time
Time interval between onset of stimulus and initiation of response
Simple RT
One stimulus and one possible response
Choice RT
Multiple stimuli and multiple possible responses
Discrimination RT
Multiple possible stimuli, multiple possible responses, with only a single correct response (Go/No Go)
Fractionated Reaction Time
Using electromyography, RT can be fractionated into pre-motor and motor components
Pre-Motor Time
Fractionated
Reflects time required to develop the plan of action and send it to the musculature involved (cognitive)
Motor Time
Fractionated
Represents the mechanical processes associated with the action (mechanical)
Variables Influencing RT
Number of response choices Complexity of the response Accuracy demands Amount of practice Alcohol and RT
Number of response choices
increase # of response choices = increase RT
Complexity of the response
Number of components
Increased complexity = increased RT
Accuracy demands
Increased accuracy demands = increased RT
Amount of practice
Increased amount of practice = decreased RT (up to a certain point)
Alcohol
Increased alcohol intake = increased RT
Total Response Time
Time from the initiation of the stimulus until the movement (response) is completed
-Foreperiod or warning interval: time from the warning stimulus until response time
Movement Time
Time between the start of the movement and its completion
Effective in demonstrating speed-accuracy trade-offf
Fitts’ Law and Movement Time
Speed-Accuracy Trade-off
The faster you move, the less accurate you are
Performances Errors
AE
CE
VE
E
Absolute Error
Overall amount of error in a performance
Constant Error
level of bias in a performance (considers amount and direction of error)
Variable Error
Measures the inconsistency in performance
Total Error
Provides an overall measure of performance. It is derived combination of CE and VE.
Performance Errors- Continuous Skills
Root-mean-square error (RMSE)
