Preattentive perception of elementary three dimensional shapes

inter-stimulus interval (ISI) time of 0 , 16, or 26 msec and a 200 msec mask. Stimulus screens contained 3, 6, 12, 18 or 24 items of display, with each item ...
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CUBES VS PYRAMIDS 350

SOA for 75% Accuracy (msec)

cubes 300

pyramids rev pyr

250

200

150

100

50 3 items

¢´&-G:C5 c “D¥©=,5E"*H&(F6$…˜

12 items

24 items

s5J"23 a

Number of Display Items

SOA for 75% Accuracy (msec)

CUBES VS Y-JUNCTION IN CIRCLES 200 180

cubes

160

Y in circles

140 120 100 80 60 40 20 0 3 items 12 items 24 items Number of Display Items



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SOA for 75% Accuracy (msec)

ASYMMETRY IN Y-JUNCTION IN CIRCLES TASKS 120 normal 100 reverse 80 60 40 20 0 3 items 12 items 24 items Number of Display Items

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