adolescent/young adulthood than any other age group (young people living at home, moving out and living independently or with peers/partners, moving back home, etc). . The SEU project Young Adults with Complex Needs thus aims to identify how services can best fit the needs of year olds experiencing problems in . The current study examined stability and change in personality and social relations in young adults (N&barbelow; = ), aged 18 to 23, over a week interval. Young adulthood is a transitional period in development where both social relations and personality are likely to change.