Unformatted text preview: t al. (1966) 10 Reaction Time and Sprinting
In track and field sprints, the sport's governing
body, the IAAF, has a rule that if the athlete
moves within 0.10 seconds after the gun has
fired the athlete has false started. http://www.condellpark.com/kd/reactiontime.htm because there is no way you can react that fast-because you are no longer reacting you are anticipating. trendline---the middle of all the points plotted---its almost horizontal
what does that mean?????…it means that the reaction time is a very
reaction time isnt really signiﬁgant in efecting the race time
the force plates determine if the racer is initiating a start too soon.
if they apply a little too much force it will considered a false start. Performance Measures: Time
know this shit!!!!!!!!!!!!!!!!!!!! time (RT): the interval of time from the
onset of a ‘go’ signal or stimulus to the initiation of
• Movement time (MT): the interval from the
initiation of the response to the completion of the
• Response time: the sum of RT + MT. From the
onset of a ‘go’ stimulus to the completion of the
movement. studies have shown that tlking on a cell phone is just as bad as
being drunk. the reaction time is slower when you are talking on a cell
phone than when you are driving drunk.
-but talking to someone next to you no problem.
-talking to a passenger in the car is contextual to the experience you
are in and when you are on a cell phone they have no idea what
your context is. These are all defined by observable events Electromyography (EMG) in RT measures
• EMG, which indicates electrical activity of muscle,
has been used to separate RT into central and peripheral
components. • Research shows that following presentation of a stimulus, for a portion
of RT, there is no electrical activity. This 40-80 ms period is known as
pre-motor RT represents CENTRAL PROCESSES (decision making/
perceptual processes etc).
Weiss, 1965 11 KNOW THIS SHIT!!!!!!! WILL BE VERY VERY HELPFUL ON THE EXAM!!!!!!!!!
Electromyography (EMG) in RT measures
Foreperiod Motor RT MT Response time Measures of Magnitude
Indicate the ‘size’ of an outcome, and have particular
relevance in sports settings. Weight Distance How far you throw Height
How much you lift How high you jump Performance Outcome Measures
Magnitude Accuracy Distance
Weight Dichotomy hit/miss
Zones of accuracy
RMSE Time/speed there are two types of measure out come and process measures
all of these are outcome measures know that they are outcome
measure and be able to distinguish them from process measures. Reaction Time
Response Time 12 Performance Process Measures
• Outcome measures do not tell us how a result was
achieved. To understand what underlies
performance, we need process measures Kinematics
Kinetics EMG EMG is a process measure but it is involved in outcome
but IT IS A PRO...
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This document was uploaded on 03/28/2014 for the course KNES 385 at Maryland.
- Fall '08