Final answer:
The four types of infant attachment observed in the Strange Situation are secure attachment, avoidant attachment, resistant attachment, and disorganized attachment.
Step-by-step explanation:
In secure attachment, the toddler prefers the parent over a stranger and seeks the attachment figure in times of stress. Securely attached children are happy to see their caregivers when they return in the Strange Situation experiment. Avoidant attachment is characterized by the child avoiding or ignoring the attachment figure and showing little distress when they leave the room. Resistant attachment involves clingy behavior, fearfulness, anger with the parent during separation, and difficulty in comforting. Disorganized attachment is seen in children who have been abused and is characterized by freezing, running around the room erratically, or trying to run away when the caregiver returns.