Reaction Time: General - 2
u History - continued
l Donders Subtractive Method
u Three Types of Trial
v a reaction:   Stimulus and response are always the
same.
v b reaction:   More than one stimulus, each with own
response.
v c reaction:   More than one stimulus, only one of which
has a response.
u The subtraction
v a reaction time =   nervous system conduction from
sensation to motor response.
v c - a time =   identification time. Why?
v b - c time =    selection time. Why?