Reaction to Stranger (Stranger Anxiety):
Insecure Avoidant/Anxious (Type A): plays with stranger regardless of mother's presence -> doesn't check for mother's presence
Secure (Type B): is indifferent to stranger when mother is present but ignores stranger when alone(stranger fear)
Insecure Resistant/ Anxious (Type C): shows fear of the stranger + avoids stranger with or without mother being present