Changes in Japanese mother-child separation anxiety in Japan (1963-1972).
D000223:Adaptation, Psychological; D000367:Age Factors; D001007:Anxiety; D002675:Child, Preschool; D003423:Critical Period, Psychological; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008426:Maternal Deprivation; D009034:Mother-Child Relations