title: Development of infant crying behavior: a longitudinal case study.
abstract: This study documents the development of infant crying behavior during the second half of the first year (across a key developmental transition). Two female infants were observed twice a month for 6 months when the infants were between 7 and 14 months of age. The infants exhibited crying behavior that seemed to become more sophisticated with increasing age. This marked a proactive stance in communicating with the mother on the part of the infant. Interestingly, at 11-12 months, "fake crying" was observed during a naturalistic interaction with the mother. This implied that deceptive infant behavior could be seen at quite an early stage.
authors.affiliation: Faculty of Foreign Languages, Tajik State Institute of Languages, Dushanbe, Tajikistan. hnkym@hotmail.co.jp
authors.forename: Hiroko
authors.initials: H
authors.lastname: Nakayama
mesh_terms: D000367:Age Factors; D003448:Crying / Q000502:physiology* / Q000523:psychology; D005149:Facial Expression; D005260:Female; D006801:Humans; D007223:Infant; D018730:Infant Behavior; D008137:Longitudinal Studies; D008425:Maternal Behavior; D009034:Mother-Child Relations; D011930:Reaction Time / Q000502:physiology; D014741:Video Recording