title: Why we have to say good-bye. A psychological examination of a social custom.
mesh_terms: D001010:Anxiety, Separation; D002562:Ceremonial Behavior; D002657:Child Development; D005260:Female; D005619:Freudian Theory; D006801:Humans; D007396:Internship and Residency; D007398:Interpersonal Relations; D008297:Male; D009034:Mother-Child Relations; D009769:Object Attachment; D011570:Psychiatry / Q000193:education; D011582:Psychological Theory; D012660:Semantics; D012919:Social Behavior; D012925:Social Conformity; D014705:Verbal Behavior