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Quantified Assessment of Infant's Gross Motor Abilities Using a Multisensor Wearable
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Infant Spontaneous Motor Tempo.

Sinead Rocha1,2, Victoria Southgate3, Denis Mareschal1

  • 1Centre for Brain and Cognitive Development, Birkbeck University of London, London, UK.

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|August 30, 2020
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Summary

Infant spontaneous motor tempo (SMT) speeds up with age, contrary to predictions. Parent body size, not infant size, influences SMT, suggesting rhythm is learned through caregiver-carried movement.

Keywords:
Spontaneous Motor Tempobody sizeinfant developmentlocomotionrhythmvestibular

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Area of Science:

  • Developmental Psychology
  • Motor Control
  • Infant Rhythms

Background:

  • Spontaneous Motor Tempo (SMT) is influenced by age and body size in adults and children.
  • Previous research suggests larger body size correlates with slower SMT, possibly due to biomechanics or locomotion experience.

Purpose of the Study:

  • To document infant SMT from 5 to 37 months using a drumming task.
  • To investigate the influence of infant age, own body size, and parent body size on infant SMT.
  • To test the hypothesis that rhythmic experience, specifically locomotion, shapes SMT.

Main Methods:

  • Infants aged 5-37 months performed a simple drumming task to measure SMT.
  • Statistical analyses were used to determine predictors of SMT, including infant age, infant body size, and parent body size.

Main Results:

  • Contrary to predictions, older infants exhibited faster SMT than younger infants.
  • Infant SMT was significantly predicted by parent body size, but not by the infant's own body size.
  • This finding suggests SMT is not solely determined by intrinsic biomechanics.

Conclusions:

  • Infant SMT development is not a simple slowing with age as seen in adults.
  • The influence of parent body size suggests SMT may be acquired through passive rhythmic experiences, such as being carried.
  • Vestibular stimulation from caregiver-carried locomotion may play a key role in setting early infant rhythms.