A piece of paper looks white in both the noonday sun and under moonlight, even though there is less light being reflected off the paper under moonlight. This form of perceptual constancy is called ________.
A) size constancy
B) shape constancy
C) brightness constancy
D) color constancy

Question

A piece of paper looks white in both the noonday sun and under moonlight, even though there is less light being reflected off the paper under moonlight. This form of perceptual constancy is called ________.
A) size constancy
B) shape constancy
C) brightness constancy 
D) color constancy

Quizplus · Accepted Answer

Brightness constancy refers to the fact that an object will still appear to have the same brightness even when the amount of light reflecting off it changes. This is why a piece of paper will still appear white under different lighting conditions, such as in the bright sun or dim moonlight. Size constancy refers to the fact that an object will still appear to have the same size even when viewed from different distances, shape constancy refers to the fact that an object will still appear to have the same shape even when viewed from different angles, and color constancy refers to the fact that an object will still appear to have the same color even under different lighting conditions.

A Piece of Paper Looks White in Both the Noonday