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Updated: Jun 12, 2026

Exploring Infant Sensitivity to Visual Language using Eye Tracking and the Preferential Looking Paradigm
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Development of infant crying behavior: a longitudinal case study

Hiroko Nakayama1

  • 1Faculty of Foreign Languages, Tajik State Institute of Languages, Dushanbe, Tajikistan. hnkym@hotmail.co.jp

Infant Behavior & Development
|June 19, 2010
PubMed

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.

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