title: The infant's first reaction to strangers: distress or anxiety?
mesh_terms: D001007:Anxiety; D001010:Anxiety, Separation; D004532:Ego; D005149:Facial Expression; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D009034:Mother-Child Relations; D002666:Psychology, Child; D013315:Stress, Psychological