KNES 371 Lecture Notes - Lecture 2: Approximation Error, Chronometry, Your Movement
Document Summary
Ch 2 scientific measurement & motor control. Timing/duration of movements: reaction time (rt): period of time between presentation of stimulus and actual response. Perception (identification of stimulus); decision making (what will you do in response to stimulus); response organization (organizing the system to execute action/response); response. Simple reaction time: one stimulus with only one response. Choice reaction time: multiple possible stimuli with their respective responses. Discrimination rt: there are multiple stimuli but you only respond to one. Variables influencing rt: number of response choices. Response organization: takes you longer to put the movement together: accuracy demands. Decreases speed of transmission in the brain. The faster you move, the less accurate you can be: if you move slower, you can be more accurate, if the task requires you to be detailed, your movement speed can be calculated. The speed and accuracy tradeoff occurs in tasks where speed and accuracy are both necessary (sports).
