Final answer:
Avoidant attachment is characterized by a lack of responsiveness to the parent, indifference to their departure and return, and a lack of preference for the parent over a stranger.
Step-by-step explanation:
Based on how the infants/toddlers responded to the separation and reunion, Ainsworth identified three types of parent-child attachments: secure, avoidant, and resistant. In the case of avoidant attachment, the child is unresponsive to the parent, does not use the parent as a secure base, and does not care if the parent leaves. This type of attachment is often associated with a caregiver who is insensitive and inattentive to the child's needs.