AI Article Synopsis
- Within-individual variability in infant handedness suggests that it only becomes consistent during childhood.
- Research indicates that the way infants use their hands is affected by their developing ability to sit, crawl, and walk.
- A study of 275 infants found that changes in how they use one hand (lateralized hand-use) are not linked to their postural development, while their ability to use both hands symmetrically for grabbing objects improves with greater postural skills.
Article Abstract
Within-individual variability is such an apparent characteristic of infant handedness that handedness is believed to consolidate only in childhood. Research showed that manifest handedness is influenced by emerging postural skills (sitting, crawling, and walking). In this investigation, it was proposed that symmetric hand-use (tendency to acquire objects bimanually), rather than lateralized hand-use (the use of one hand more than the other), may be influenced by postural changes. Trajectories of lateralized and symmetric hand-use for object acquisition were examined in 275 infants tested monthly from 6 to 14 months. Multilevel modeling revealed that change in lateralized hand-use is unrelated to developmental transitions in infant posture, whereas the trajectory of symmetric hand-use changes significantly with the development of postural skills.
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| http://dx.doi.org/10.1111/cdev.12121 | DOI Listing |
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