A research team studied 11 children with brain lesions, areas of damaged tissue, to determine the relationship between gesture and language development. They compared the children’s development to language development in 53 children without brain injuries.
Researchers found that eight of the 11 children with brain injuries had vocabulary development below the 25th percentile at 18 months, but only five of the children still had delayed language development four months later.
“The striking result of our study is that these five children with language delays were the same five who were low gesture producers at 18 months,” said Susan Goldin–Meadow, the Beardsley Ruml Distinguished Service Professor in Psychology and an expert on gesture.
“Thus early gesture may provide clinicians with a way to identify children who may end up having persistent language difficulties, even before those difficulties appear in the children’s speech,” she added. “Our results also raise the possibility that encouraging children with brain lesions to gesture may prove an effective intervention to prevent language delay.”
Goldin–Meadow is an author of the paper, “Early Gesture Predicts Language Delay in Children with Pre– or Perinatal Brain Lesions,” published in the March issue of Child Development, along with lead author Eve Sauer, a University researcher, and Susan Levine, the Stella M. Rowley Professor in Psychology.
The team studied 11 children from age 18 months to 30 months. All of the children had suffered brain injuries prenatally or during birth.
The children were observed in their homes three times a year for 90 minutes while they interacted with their primary caregivers in normal, everyday activities. Researchers tape–recorded the interactions, which included children’s gestures and their speech.
Although as a group the children with lesions produced as many gestures as the typically developing children, “there was a great deal of variability within the group of children with pre– and perinatal brain lesions,” Sauer said. Of the 11 children in the sample, five were found to be using many fewer gestures.
“At 18 months, it was not possible to reliably distinguish the two groups on the basis of their speech use, only their gesture use,” Levine said. The five children who used fewer gestures later had delayed language development, she said.
Other research, including work by Goldin–Meadow, has shown a strong relationship between gesture and language development in children without brain injuries. The new research shows that this relationship also exists in children with early brain lesions.
Gesture reflects the speed at which children develop language, but gesture may play a role in speeding up language development, Goldin–Meadow said. For example, parents may respond to a child’s pointing at an object by providing a label for the object. This would give the child just the right linguistic input at just the right moment.
The research was supported with grants from the National Institute of Child Health and Human Development and the Brain Research Foundation.