The differences in how the brains of adults and children understand social interactions is now better understood thanks to a new study.
Research has revealed a striking brain difference between adults and children that potentially explains developmental differences in social interaction understanding.
The results of the study, by Bangor University and the University of Coimbra in Portugal, has been hailed as an important step in gaining further insight into how the brain develops.
The functional magnetic imaging study involved scanning the brains of children (aged six to 12 years old) and adults (18+) while they viewed brief videos of two human figures interacting.
Activation responses in the superior temporal sulcus (STS) – a brain area that is involved in the visual processing of social interactions – were measured and combined with measures of connectivity to other parts of the brain.
The results show that in adults, activation to social interactions in the STS is related to connectivity to brain areas involved in processing static and dynamic body information; in children however, STS activation is related to connectivity to brain areas involved in making deeper social judgements about other people’s hidden thoughts and beliefs (a process known as “mentalising”).
Lead author Jon Walbrin, of the University of Coimbra, explains: “Most previous social neuroscience studies have focused on measuring responses to other people as individuals.
“But more recently there has been an increased interest in understanding brain responses to others in the context of social interactions. However, very little is currently known about how such responses develop during childhood.
“These results suggest that children and adults might employ different strategies for interaction understanding: Adults rely more on observable, body-based information, while children – with less social experience – engage more in effortful reasoning about what others are thinking and feeling during an interaction.
“This likely reflects the process of learning to understand interactive behaviour”.
Author Kami Koldewyn, from Bangor University, added: “The current results help us better understand how brain networks involved in social cognition change across development.
“Most adults don’t need to think to understand social interactions; they get the gist of even complex social encounters simply through information that can be observed directly.
“Children, who have much less social experience, may need to think about the intentions and feelings of the interactants to understand such social scenes.
“The changes we see in the networks that support social understanding across development likely reflect brain changes as children learn about the social world, including how to predict and understand the social encounters they observe around them.
The authors suggest that future efforts should be made to compare similar responses during adolescence as well as later adulthood.
