Factors Effecting Simple Reaction Time
u Typical Situation
l First Stimulus: a Ready or Warning Signal, alerts
subject to upcoming reaction time stimulus.
l Foreperiod: the time subject waits for the reaction
time stimulus, may be constant or variable.
l Second Stimulus: the Reaction Time Stimulus, the
stimulus the subject responds to.
l Response: the reaction time is the time from the
onset of the reaction time stimulus to the
beginning of the response.
Ready    Foreperiod             Reaction Time Stimulus
Time