After all, a newborn infant needs more than just regular feedings and diaper changes. Researchers say that infants have a strong need to communicate. True, a baby cannot talk. But a parent’s eyes, touch, and bodily contact do much to open the lines of communication.

Soviet researcher M. I. Lisina similarly cites an experiment in which babies were spoken to affectionately, smiled at and caressed. The result? After two months these babies reached “a significantly higher developmental level” than other children who did not receive this attention. Such loving communication pays emotional dividends for a child, and as Dr. Lisina further observes: “We believe interaction with other people is critically important in the genesis of [a baby’s] verbal functions.”