Most often the primary caregiver for the infant is the baby's mother. Usually the baby will form just as strong of an attachment to her father if he is highly involved in her care. Attachment is defined as a strong bond between the infant and the caregiver. It does not necessarily have to be the infant's biological parents. The best way for parents to foster the attachment with infants is to respond to the infants' needs.
Infants communicate mostly through crying.
When a newborn cries and a caregiver responds she learns that the world is a good place and that her caregiver is there to take care of her needs. She also develops a sense of trust. This strong sense of trust is the foundation for the lifetime. Without this development, a baby may have problems trusting others as she grows up. Interaction with Others Infants are born responding to people around them.