Tamiko Ogura

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BACKGROUND Child development integrates several interdependent domains, but few studies have attempted to identify the common factors that contribute to these different domains of development in infancy. The aim of the present study was to identify the factors that contribute to several domains of developmental attainment in 9-month-old infants. METHODS(More)
Detection of social signals, such as biological motion and social causality, is of basic importance in early infancy. There have also been some accounts that infants' visual preference or reaction to social signals change during development because of their changing understanding of such signals, and the detective abilities of primary social signals are(More)
BACKGROUND The purpose of this study was to examine the relations between children's social competence and initial index of theory of mind at 30 months of age. METHODS The participants of the study were 322 toddlers and parents/caregivers who were registered with the Japan Science and Technology Agency (JST) project. They completed a five-minute(More)
This study investigated developmental changes and sex differences in infants' responses to a female stranger during a face-to-face interaction, still-face, and reunion phase. Twenty-two infants (11 boys and 11 girls) were observed at five and nine months of age. At five months, the infants smiled less in the still-face phase, while at nine months the(More)
Between 10 and 15 months of age, infants seem to become increasingly communicative. The focus of this study was changes in request behavior among infants at ages 11, 13, and 15 months (N = 22) in a longitudinal design. Changes in durations and frequencies of four different modes of behavior were examined, namely, use of hands, eye gaze, facial expression,(More)
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