The correct answer would be, Resistant Babies.
Resistant Babies in Ainsworth's study were clinging and unwilling to explore, very upset by the stranger regardless of the mother's presence, protested mightily when the mother left, were hard to soothe, and had mixed reactions upon mother's return
Explanation:
Ainsworth's study is called the Strange Situation. This was developed by Mary Ainsworth, in the year 1970. This study was devised to observe relationship based on attachment between the child and the caregiver, who is usually the mother.
This study can be applied on the children with the age from 9 to 18 months.
According to this study, the Resistant babies were clingy and unwilling to explore and do not welcome strangers even in the presence of their mother. They protest mightily when the mother leaves and were hard to soothe. Their reaction on mother's return was observed to be mixed.
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