Infants with a clear hand preference show advanced language ability as toddlers

July 16, 2014 by Daniel Kienzler, Florida International University

(Medical Xpress)—Infants who exhibit a consistent right hand preference are more likely to develop advanced language skills by age two, according to a study by FIU psychologist Eliza L. Nelson. The findings were recently published in the journal of Developmental Psychology.

In the study, Nelson measured handedness – the tendency to use one hand more naturally than the other – in different ways according to the age-appropriate motor level. She looked at how used their hands to pick up toys and compared it to how they used their hands in combination to manipulate toys as toddlers.

"We can't ask an infant to write, as we might do with an adult participant," Nelson said. "So a challenge for researchers studying the development of handedness is to choose tasks that are fun and engaging for the child and sufficiently challenging without being frustrating."
The study suggests there may be an advantage to having consistent hand preference as an infant. Results showed children who had clear early hand preference performed better on tests than those who did not develop handedness until toddlerhood. Those who were inconsistent in their hand use as infants, but developed a preference for the left or right hand as toddlers, had language scores in the typical range for their age.

"We know that when children enter school they vary in their language and fine motor abilities, and these differences are linked to later academic achievement," Nelson said. "Our larger goal in this work is to identify how language and motor skills are linked in development and to identify earlier markers of school readiness."

Nelson tracked 38 children over 16 monthly visits – nine infant visits at 6 to 14 months of age, and seven toddler visits at 18 to 24 months of age. Language skills were measured by the Bayley Scales of Infant and Toddler Development – an individually administered test designed to assess developmental functioning of infants and toddlers. Some children showed a clear right-hand preference during the infant visits and continued to be right-handed as toddlers. Others did not show a clear as infants, but were either right or left-handed by age two.

Explore further: A dominant hemisphere for handedness and language?

More information: The study is available online: psycnet.apa.org/journals/dev/50/3/809.html

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Rosser
not rated yet Jul 16, 2014
So - what's the long term difference? Do children who have a clear preference continue to do better, or do the others catch up and perhaps surpass their peers at a later age? I'm not sure of the significance of this research. Without knowing the long term effect this could lead to bad decisions on the part of child development specialist and do more harm than good.

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