Journal of Epidemiology
Online ISSN : 1349-9092
Print ISSN : 0917-5040
ISSN-L : 0917-5040
Japan Children's Study 2004–2009, a Developmental Cohort Study of Early Childhood
Developmental Trends in Mother-Infant Interaction from 4-Months to 42-Months: Using an Observation Technique
Masatoshi KawaiKumiko NambaYuko YatoKoichi NegayamaShunya SogonHatsumi Yamamoto  Japan Children's Study Group
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2010 Volume 20 Issue Supplement_II Pages S427-S434

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Abstract
Background: It is clear that early social interaction follows from mother-infant interaction after pregnancy. Many researchers have illuminated this interaction in the first years of life. Most common mother-infant interaction is the attachment behavior of an infant. The Japan Children’s Study (JCS) development psychology group hypothesis is that the early mother-infant interaction will predict later social behaviors. But the method applied to evaluate this interaction mainly comes from the evaluation of the whole observation situation and is dependent upon the coder. We applied a new observational method that checked the on/off status of behavior and recorded sequentially.
Methods: Using a semi-structured observation setting as our method, we analyzed the developmental change of mother-infant interaction within a toy situation.
Results: The result indicated that mother-infant interaction with a toy altered at around 9-months and is salient to the usual developmental change of joint attention. Additionally cluster analysis suggested that the developmental pattern is divided into two clusters. This is the first report on a developmental pattern of joint attention.
Conclusions: These results indicated that the developmental trend of gaze direction and vocalization is one candidate of measure for evaluating the mother infant social interaction from the point of joint attention.
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© 2010 by the Japan Epidemiological Association
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