2_Unit1.2_Measurement copy

Damon et al 1966 10 reaction time and sprinting in

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

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 weak correlation. 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 •  Reaction onset of a ‘go’ signal or stimulus to the initiation of a response •  Movement time (MT): the interval from the initiation of the response to the completion of the movement. •  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 Warning Stimulus Presentation Movement Onset Movement Offset EMG Pre-motor 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 Height Weight Dichotomy hit/miss Zones of accuracy Absolute error Constant error Variable error 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 Movement 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 measure but IT IS A PRO...
View Full Document

This document was uploaded on 03/28/2014 for the course KNES 385 at Maryland.

Ask a homework question - tutors are online