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Related Experiment Videos

Quieting during early infancy: evidence for a developmental change?

B Hopkins1, B Janssen, O Kardaun

  • 1Department of Developmental Neurology, University Hospital, Groningen, The Netherlands.

Early Human Development
|December 1, 1988
PubMed
Summary

Newborns can stop crying without help, with or without hand-mouth contact. This ability changes in infants up to 18 weeks, influenced by movement and posture, not intentionality.

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Area of Science:

  • Developmental Psychology
  • Infant Behavior
  • Neonatal Studies

Background:

  • Infants often cry to communicate needs.
  • Understanding self-soothing behaviors in newborns is crucial for developmental research.
  • Previous research has explored infant calming techniques, but developmental changes in spontaneous quieting require further investigation.

Purpose of the Study:

  • To investigate the developmental trajectory of spontaneous quieting (ability to terminate crying without intervention) in infants from birth to 18 weeks.
  • To examine the role of hand-mouth contact in infant quieting.
  • To explore potential explanations for observed changes in quieting abilities.

Main Methods:

  • A study involving two groups of infants: 11 newborns within the first hour after birth and 14 infants longitudinally observed every 3 weeks from 3 to 18 weeks.

Related Experiment Videos

  • Observation of crying episodes and the infant's ability to self-quiet, with and without hand-mouth contact.
  • Recording instances of hand chewing/sucking during quieting episodes.

    • Main Results:

    • Most newborns demonstrated quieting abilities both with and without hand-mouth contact.
    • In the longitudinal group, quieting with hand-mouth contact emerged at 9 weeks, while quieting without contact was present from 3 weeks.
    • Hand chewing/sucking frequently accompanied quieting with hand-mouth contact.

    Conclusions:

    • Infant quieting abilities undergo developmental changes between 0 and 18 weeks.
    • The emergence and disappearance of quieting with hand-mouth contact are likely related to developmental shifts in infant movement and posture.
    • The data do not support intentionality as an explanation for these quieting behaviors.