Ainsworth’s student Mary Main found signs of a fourth attachment category. Main noticed how some children without secure attachment behaved differently than their anxious or avoidant peers when their mother left and reentered the room. When the mother returned, these little ones would first run toward her, but then pull or run away. Some curled up in a ball or hit the mother. The first impulse to seek comfort is evident, but as the mother approached, the child became afraid. These children were “disorganized” and disoriented, as demonstrated by confused expressions, freezing, or wandering.24