When looking at the wall-mount telephone straight on, a rectangular image forms on Kirby's retinas; looking at the same phone at an angle from the side, a trapezoidal shape forms in each eye. Yet the phone retains the same appearance despite the changing images. This is best explained by

Question

Quizplus · Accepted Answer

Shape constancy allows us to perceive objects as having the same shape regardless of changes in retinal image. In this case, the wall-mount telephone retains the same overall shape and appearance despite the different images formed on Kirby's retinas when viewed from different angles.

When Looking at the Wall-Mount Telephone Straight On, a Rectangular