How Infants Encode Spatial Extent

This study explores how infants encode an object's spatial extent. We habituated 6.5-month-old infants to a dowel inside a container and then tested whether they dishabituate to a change in absolute size when the relation between dowel and container is held constant (by altering the size of both container and dowel) and when the relation changes (by altering only the size of the container but not the dowel). Infants only dishabituated when the relation changed, suggesting that they do not encode the absolute size of either object but only the relation between them.