Which of the following is NOT one of the identified attachment styles from Ainsworth's research?

In Ainsworth's research on attachment styles, three primary styles were identified: secure attachment, insecure-avoidant attachment, and insecure-resistant attachment. Secure attachment is characterized by a strong, healthy emotional bond, where children feel safe and are comfortable exploring their environment, knowing they can return to their caregiver for support. Insecure-avoidant attachment occurs when children avoid or show little interest in their caregiver, typically due to a lack of responsiveness from the caregiver. Insecure-resistant attachment is characterized by anxiety and ambivalence, where children may clinge to their caregiver but also show resistance or distress when they are close.

The term "insecure-transitional" does not correspond to any established category in Ainsworth's framework of attachment styles. Therefore, identifying it as not being one of the defined attachment styles is accurate, as it does not appear in the literature or research around attachment. Understanding these attachment styles helps caregivers and educators recognize children's emotional needs and responses, ultimately guiding effective interaction and support strategies.