The formation by a child of significant and stable emotional connexions with the significant people in its life. This process begins in early infancy as the child bonds with one or more primary caregivers. A failure by a child to establish these types of important connexions before the age of about five years may result in the child experiencing difficulties with a wide variety of social relationships for significant periods of time in its life. Severe cases can fit within the definition of a more permanent condition known as "reactive attachment disorder. "