When two people develop long and lasting emotional bonds, in this case the infant and their caregiver. Both the infant and caregiver seek closeness to each other and feel secure when close to their attachment figure.
The caregiver carefully paying attention to the infant's communication and responding appropriately, such as comforting, feeding or changing the infant depending on what they are trying to communicate.
Stage 1 (birth to 6 weeks) - Asocial stage, infants display behaviors like crying and smiling to any caregiver
Stage 2 (6 weeks to 7 months) - Indiscriminate attachment, infants can tell difference between familiar and unfamiliar adults but don't show separation or stranger anxiety
Stage 3 (5-9 months) - Specific attachment, infants form strong connection to primary caregiver, show separation and stranger anxiety
Stage 4 (9-10 months) - Multiple attachment, infants develop attachments to other caregivers like fathers, stranger anxiety decreases