Toddler roberto is left with a stranger for a few minutes. he was quite upset and hard to calm down while his mother was away, but did not really seem happy when she returned. according to ainsworth's t heory, roberto is probably attached group.

Ambivalence attached group

Explanation:

Ambivalently is a mental condition or state of having simultaneous contradictory reactions, in which a person has both positive and negative feelings about the same person or same object. It is a kind of mixed feelings and mixed experienced. Psychologically uncomfortable ambivalence, may results in avoidance and procrastination.

Toddler Roberto is having mixed feeling for a stranger, therefore, Anisworth's theory, Roberto is probably Ambivalently attached group or detached personality.