perceptual constancy perceptual constancy /pərˈsɛptʃʊəl ˈkɑnstənsi/

noun

1. (psychology) the tendency for perceived objects to give rise to very similar perceptual experiences in spite of wide variations in the conditions of observation  ( constancy , perceptual constancy )
   (psychology) the tendency for perceived objects to give rise to very similar perceptual experiences in spite of wide variations in the conditions of observation