Skip to main content
size constancy

size constancy

7.0
Seeing a familiar object as the same size even when distance makes it look smaller or larger
  • noun
  • /saɪz kənˈstænsi/
  • Specialized
translation icon : constancia del tamaño
  • In psychology class, we learned that size constancy allows us to recognize a car as the same size, whether it's close or far away.

Examples

  • Preliminary results in the application of the hypercolumn theory applied to image features understanding reveal tremendous potential for the development of algorithms that can provide credence to the principles of size constancy and orientation independence.

    Academic text (1995)
  • Even though the tree looked smaller from a distance, her understanding of size constancy helped her realize it was the same height as before.

  • When he stepped back, the painting appeared to shrink, but his grasp of size constancy reminded him that its actual dimensions remained unchanged.

Surface Forms

Morphology

size + constancy

The meaning is directly compositional: 'size constancy' denotes the constancy (stability) of an object's size. A B1 learner who knows 'size' and 'constancy' can reasonably infer this refers to perceiving an object's size as remaining the same despite changes in distance or retinal image; it is a technical term but follows standard, transparent noun+noun composition found across languages.

Etymology

Size constancy comes from a simple image: imagine a car moving away and looking smaller to your eyes, but you still know how big the car really is. Your brain keeps the object's size constant, the constancy part, so you think of it as 'the same size' even when the picture on your eye becomes smaller.