Transient and Sustained Contrast Processes Underlying the Human Stereoscopic Depth Mechanism

Abstract

Stereo detection performance was measured with random-dot stereograms with interocular delay. When a 10 ms pattern pulse was presented at various point of a 200 ms presentation to the other eye, detection decayed quickly and reached the chance level around 50 ms SOA, but detection was almost perfect up to 200 ms SOA when contrast was high. However, when two patterns had an equal duration (50-150 ms), and were presented successively with no ISI, detection declined around 80 ms SOA regardless of contrast level, which suggest limited duration of transient responses even at higher contrasts.