Exam 1 - Chapter 2 - Part 1 Flashcards
reaction time (RT)
time interval between onset of stimulus and initiation of response (determined by the interval of time)
simple RT
involves one external stimulus and one possible response
-shortest reaction time
choice RT
involves multiple stimuli and multiple possible responses
-longest reaction time
discrimination RT
involves multiple possible stimuli multiple possible responses, with only a single correct response (Go/No Go)
-takes 50 more mill sec
stroop effect
discovered by Dr. Stroop
fractionated reaction time (FRT)
using electromyography RT can be fractionated into premotor components
premotor time (PRMOT)
believed to reflect the time required to develop the plan of action and send it to the musculature involved
motor time
represents the mechanical processes associated with the action
movement time (MT)
defined as the time interval between the start of a movement and its completion
total response time (TRT)
defined as the time from the initiation of the stimulus until the movement (i.e. response) is completed
= RT + MT
Fitts’ Law and MT
a model of human movement, predicting the time required to rapidly move from a starting position to a final target area, as a function of the distance to the target and the size of the target
MT = a+b((log2)2D/W) D = distance W = size of the target
absolute error (AE)
measures the overall amount of error in a performance
accuracy
(picture for equation)
constant error (CE)
represents the subject’s average error in responding. CE is reported in terms of units that represent the amount of deviation from the target
(picture for equation)
variable error (VE)
measures the inconsistency in responding. it represents the variability of a subject’s performance about the subject’s average response
(picture for equation)
total variability (E)
provides an overall measure of performance. it is a derived combination of CE and VE
