Perceptual Constancy + Illusions

Perceptual Constancy

= perceiving objects to be constant despite contradictory sensory info

Shape Constancy

= knowing that a door is still rectangular despite it looking trapezoidal when open

Size Constancy

= an approaching train gets “bigger”, but your brain knows that it’s actual size is the same

Ponzo Illusion

Muller-Lyer Illusion

violation of size constancy

Impossible Figures

Moon Illusion

Why does the moon look so much bigger on the horizon than in the middle of the sky?

Ames Box