The gray intersections in the Hermann Grid
A) are physically present.
B) are explained by dark adaptation.
C) support the claim that "perception is not the same as the physical stimulus."
D) are best explained by feature detectors.

Question

Quizplus · Accepted Answer

The gray intersections in the Hermann Grid illusion illustrate the phenomenon of contextual modulation, where perception is influenced by the surrounding context, rather than just the physical stimulus. Therefore, these gray intersections are not physically present and are not explained solely by dark adaptation. Feature detectors may play a role in visual processing, but they do not account for the Hermann Grid illusion.

The Gray Intersections in the Hermann Grid