In three eye-tracking studies, Kovacs and Mehler found that infants, reared with two languages from birth, display improved cognitive control abilities compared with matched monolinguals.

These infants displayed unique abilities from infancy and were called child gods by some, child demons by others.

Such infants often display oral-tactile hypersensitivity (also known as oral aversion).

Still other infants display no obvious symptoms at birth, going many months without a confirmed diagnosis of hydranencephaly.

Children were named after events, their birthplace, other favored locations, animals, or any characteristics the infant displayed.

In support of fetal olfactory learning, newborn infants display behavioral attraction to the odor of amniotic fluid.

Newborn human infants, like animals, do not display any sense of empathy with their fellow creatures, nor answerability to obligation, nor guilt or remorse.

Biologically, infants display fasting hypoglycemia, postprandial hyperglycemia and hyperinsulinemia, which progress to permanent hyperglycemia and recurrent diabetic ketoacidosis.

From this groundbreaking study, Ainsworth developed different forms of attachment styles that infants display with the people they are close to.

At age 6 months, infants display joint attentional skills by: