An afterimage when viewed in the dark appears to move when you move your eyes. The corollary discharge theory predicts this because _____.
A) there is an IDS, but not a CDS
B) there is no IDS, but there is a CDS
C) there is no IDS and no CDS
D) there is both IDS and CDS

Question

Quizplus · Accepted Answer

The corollary discharge theory suggests that an afterimage appears to move in the dark when you move your eyes because there is a corollary discharge signal (CDS) sent to the brain about the eye movement, but no image displacement signal (IDS) since the afterimage does not actually move on the retina.

An Afterimage When Viewed in the Dark Appears to Move