Question 1
At the absolute threshold, what proportion of the time is a target stimulus detected?
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1 percent of the time◦
25 percent of the time◦
50 percent of the time◦
100 percent of the timeQuestion 2
At the level of the retina and brain, which colour vision theory is supported?
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opponent process theory at the retina, but trichromatic theory in the brain◦
trichromatic theory◦
trichromatic theory at the retina, but opponent process theory in the brain◦
opponent process theory