Pre-Attentive Experiment
a
3
6
1
2
N
u
m
b
e
r
o
f
d
i
s
t
r
a
c
t
o
r
s
5
0
0
7
0
0
9
0
0
Number of irrelevant items varies
Pre-attentive 10 msec per item or better.
Decision = Fixed Time
regardless of the number of distractors
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Preattentive