Study mapped their brain response while copying adults playing with toys
THURSDAY, Oct. 31, 2013 (HealthDay News) -- Babies imitate other people to learn how to do things, and now researchers say they've pinpointed just how infants' brains work during that process.
Copying others is a vital learning tool for babies, who often will observe how other people do things -- for example, guiding a spoon to the mouth -- and then imitate those body movements.
This study is the first to identify specific brain activation patterns in babies when watching an adult perform tasks with different parts of the body, according to the authors of the study, which was published online Oct. 30 in the journal PLoS One.
Seventy 14-month-old infants were fitted with caps with embedded sensors that detected brain activity in regions of the cortex that respond to movement or touch of the feet and hands. The babies sat on a parent's lap and watched as a researcher touched a toy placed on a low table between the baby and the researcher.
When the researcher used her hand to touch the toy, the hand area of the infants' brains showed increased activity. When the researcher used her foot to touch the toy, the foot area of the infants' brains showed increased activity.
"Babies are exquisitely careful people-watchers, and they're primed to learn from others," study co-author Andrew Meltzoff, co-director of the Institute for Learning and Brain Sciences at the University of Washington, said in a university news release. "Now we see that when babies watch someone else, it activates their own brains. This study is a first step in understanding the neuroscience of how babies learn through imitation."
"The reason this is exciting is that it gives insight into a crucial aspect of imitation," study co-author Peter Marshall, an associate psychology professor at Temple University, said in the news release.
"To imitate the action of another person, babies first need to register what body part the other person used," Marshall said. "Our findings suggest that babies do this in a particular way by mapping the actions of the other person onto their own body."
Zero to Three has more about infants' brain development (http://main.zerotothree.org/site/PageServer?pagename=ter_key_brainFAQ ).
SOURCE: University of Washington, news release, Oct. 30, 2013