Perception of numbers by human infants.
Infants are capable of discriminating, representing, and remembering particular small numbers of items. A perceptual enumeration process called subitizing, present in 2-year-olds, probably underlies this capacity. This finding indicates that some number capacity is present before the onset of verbal counting, and it suggests that verbal counting may have precursors present during infancy.
D006185:Habituation, Psychophysiologic; D006801:Humans; D007223:Infant; D008433:Mathematics; D010465:Perception / Q000502:physiology*; D011287:Prejudice